180530-00-ME-SPC-0002-A[1]

8/11/2019 180530-00-ME-SPC-0002-A[1]

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PETROM SA

EXPLORATION &

PRODUCTION DIVISION

PROJECT NO: 180530 DOC NO: 180530–00–ME–SPC-0002-A PAGE 2 OF41

REVISION DESCRIPTION SHEET

Rev. Para. Revision Description

HoldNo.

Para. Description of Hold

Instrument Design Specification

Instrumentation and Control for Packages

Instrument Installation

Basic Engineering Design Data

General Specification for Electric Motors

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EXPLORATION &

PRODUCTION DIVISION


1 5 EXECUTIVE SUMMARY

1.1 5 Project Outline

2 6 SCOPE

2.1 6 Definitions

2.2 6 Units

3 7 REGULATIONS, STANDARDS , CODES AND SPECIFICATIONS

3.1 7 EU Directives

3.2 7 Codes and Standard List

3.3 8 Project Specifications

3.4 8 Precedence

4 9 GENERAL REQUIREMENTS

4.1 9 Environmental Data and Utilities

4.2 9 Reparability and Maintainability

4.3 9 System Responsibilit y

4.4 9 Material Selection

4.5 10 Design Li fe

4.6 10 Pressure Vessels

4.7 10 Repair to Castings

4.8 10 Coatings

4.9 10 Nameplate

4.10 11 Spares

4.11 11 Special Tools

4.12 11 Technical Audit

4.13 11 Preservation for Shipping

4.14 11 Certifi cation and Marking

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PETROM SA

EXPLORATION &

PRODUCTION DIVISION


1 EXECUTIVE SUMMARY

PETROM have issued a reimbursable engineering contract to WorleyParsons toprovide a Front End Engineering Design (FEED) and EPC ITT documentation for theCentral and East Region OSPS Facilities consisting of 284 Parks contained within 23Projects (22 in Central Region and 1 in the East). In addition, Pre-feasibility Studiesleading to future FEED design work are to be carried out on 92 Parks (containedwithin 15 Projects) for the Western Region as well as for 45 Tank Farms in the threeregions (2 in the Eastern Region; 38 in the Central Region; and 5 in the Western

Region).

1.1 Project Outline

The Project Scope is comprised of the modernisation or abandonment of existingPark facilities. Modernisation consists of complete replacement of the existing Parkfacilities, sized to present production capacities. The Park facilities will be designed tobe of modular construction, the modules to consist of PETROM design for manifoldonly (PMAN) or one of five metering point (MP) designs as put forward by PETROM.

In addition, there are five Metering Point Production (MPP) designs covering 20 Park

facilities in the Central and East Regions that are to be evaluated for abandonment,modernising, upsizing or downsizing in addition to others in the Eastern Region thatare to be identified. Given the size and complexity of these facilities, only partialmodularisation is expected.

Work on the West Region Parks will culminate in a Pre-feasibility Study following adetailed data gathering exercise and verification of the same. There are 92 Parkscontained in 15 Projects that will be assessed for upgrade or abandonment.

The 45 Tank Farms are to be examined for upsizing, downsizing, modernisation orabandonment and will also culminate as a Pre-feasibility Study.

The scope of work begins at the manifold inlet to the Park facilities and continuesthrough to the delivery points of the Tank Farms or MPP’s; i.e. pipelines andwellheads upstream of the manifolds upstream are not considered. However,interconnecting and delivery pipelines will have to be considered in the overallassessment of the project.

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2 SCOPE

This specification covers the minimum requirements for the design, materials,fabrication, inspection, testing and documentation for Centrifugal, Reciprocating andRotary-type positive displacement Compressors on the PETROM OSPS Project.

2.1 Definitions

• The Contractor is the party who carries out all or part of the design,

engineering, procurement, construction, commission or management of theproject, or operation or maintenance of a facility.

• The Manufacturer/Supplier is the party who manufactures or suppliesequipment and services specified by the Contractor / Company

• The Company is the party who owns and operates the equipment.

• The Notified Body is the inspection body with the responsibility for ensuringthat the directives (e.g.: PED, ATEX) requirements are met.

• The word “shall” indicates a requirement.

• The word “should” indicates a recommendation.

2.2 Units

The S.I. (System International) system of units shall be used as the official unitsthroughout all documentations with the exceptions as shown on data sheets andpiping specifications.

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3 REGULATIONS, STANDARDS , CODES AND SPECIFICATIONS

All work specified shall be in accordance with the applicable sections of the latesteditions of the Regulations, Codes and Standards (and their current amendments),listed below or referenced in this specification, except where modified or supplementedby requirements noted in this specification.

3.1 EU Directives

EU Directive 2006/42/EC Machinery DirectiveEU Directive 97/23/EC Pressure Equipment Directives (PED)EU Directive 94/9/EC ATEX

3.2 Codes and Standard List

ISO 13707: 2000 Reciprocating type compressorsSR EN ISO 13631 Packaged reciprocating gas compressorsSR EN ISO 10439: 2002 Centrifugal CompressorsSR EN 13445 Unfired pressure vesselsEN ISO 10440-1:2000 Rotary-type positive displacement compressors. Part1: Process

compressors (oil free);EN ISO 10440-2:2000 Rotary-type positive displacement compressors. Part 2: Packed aircomp

EN ISO 10442:2002 Centrifugal air compressorsISO 11342:1998 Mechanical vibration - Methods and criteria for the mechanical

balancing of flexible rotors

ISO 1940-1:2003 Mechanical Vibration - Balance Quality Requirements (Part 1)

ISO 1940-2:1997 Mechanical Vibration - Balance Quality Requirements (Part 2)

API STD 613/ISO13691 Special Purpose Gear Units for Petroleum, Chemical and GasIndustry Services (5th Edition – February 2003)

IEC 60034 Rotating Electrical Machines

IEC 60079 Electrical Apparatus for Explosive Gas Atmospheres API STD 617 Axial and Centrifugal Compressors and Expander-compressors forPetroleum, Chemical and Gas Industry Services, (7th Ed. – Jul.2002)

API STD 618 Reciprocating Compressors for Petroleum, Chemical and GasIndustry Services (4th Edition – June 1995)

API STD 619 Rotary-Type Positive-Displacement Compressors for Petroleum,Petrochemical, and Natural Gas Industries, (4th Edition – Dec..2004)

API STD 614 Lubrication, Shaft-Sealing and Control Oil Systems and Auxiliariesfor Petroleum, Chemical and Gas Industry Services (4th Edition - April 1999)

API STD 661/ISO 13706 Air-Cooled Heat Exchangers for General Refinery Services (5thEdition – March 2002)

API STD 670 Machinery Protection Systems (4th Edition - November 2003)

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API STD 671 Special-Purpose Couplings for Petroleum, Chemical and GasIndustry Services (3rd Edition - October 1998) ASME B16.5 Pipe Flanges and Flanged Fittings (December 2003) ASME B31.3 Process Piping (March 2005) ASME Section V Non-destructive Examination ASME Section VIII Rules for the Construction of Pressure Vessels – Div. 1, 2 & 3 ASME Section IX Welding & Brazing Requirements ASME PTC 10 Compressors and ExhaustersBS EN 10204 // SR EN 10204 Metallic Products - Types of Inspection Documents (2004)

NACE MR0175/ISO 15156 Petroleum and Natural Gas Industries - Materials for Use in H2S-Containing Environments in Oil and Gas Production (2002)

3.3 Project Specif ications

180530–00–ME–SPC-0001 Pressure Vessel specification180530-00-IN-SPC-XXXX Instrument Design Specification (HOLD)180530-00-IN-SPC-XXXX Instrumentation and Control for Packages (HOLD)180530-00-IN-SPC-XXXX Instrument Installation (HOLD)180530–00–ME–SPC-0003 Painting and Coating Specification180530–00–PR–SPC-XXXX Basic Engineering Design Data (HOLD)180530–00–EL–SPC-XXXX General Specification for Electric Motors (HOLD)180530-00-EL–PHL-0001 Electrical Philosophy

180530–00–PI–SPC-0002 Pipe Classes and Material Specification180530–00–ME–PHL-0001 Sparing Philosophy

3.4 Precedence

In general, the order of precedence for all design work shall be:

a. Romanian Laws, Decisions, Orders, Prescriptions, Normative, Rules, NationalStandards, Codes and Regulations:

b. EU Directives

c. Contract

d. Datasheets & Drawings

e. Project Specifications and Philosophy

f. Referenced Codes & Standards e.g. IEC or other National Standards

In the event of any conflict arising between the referenced documents, laws, codesand standards, the more stringent shall be applied. Any deviation from the referenceddocuments, laws, codes and standards shall obtain written approval fromCOMPANY.

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4 GENERAL REQUIREMENTS

4.1 Environmental Data and Utilit ies

Environmental data and Utilities available, such as electric power, water, steam, plant airand their physical properties will be as noted in Project Specification 180530–00–PR–SPC-

XXXX - Basic Engineering Design Data.

4.2 Reparability and Maintainability

Equipment shall be selected to maximise availability. Every effort shall bemade to minimise the spares needed by standardisation of designs. However,this standardisation should not interfere with the required operatingperformance.

Equipment design shall take into account the following:• Any maintenance shall be easily accessible• Removal for maintenance shall be considered• Condition monitoring shall be facilitated by the design

4.3 System Responsibi lity

It is the responsibility of the engineering design to ensure that:

• The systems shall be free from excessive vibration, and shall bealigned in accordance with accepted tolerances.

• The system designs shall take account of the potential effects offoreseeable Prime Mover and component malfunction (such asengine misfire or short circuit)

4.4 Material Selection

Materials of construction for each item shall be selected to ensure that the item willremain fit for purpose throughout its design life.When determining the suitability of a material for a given application, considerationshall be given to likely degradation mechanisms, internal/external environments,normal / abnormal operational conditions and interactions with other items / materials/ chemicals, as appropriate.

Where carbon steel is to be exposed to a corrosive environment, an appropriatecorrosion allowance shall be provided, based on predicted corrosion rates over the life ofthe asset. A minimum corrosion allowance of 3.0 mm is required for carbon steel itemsexposed to "sour" hydrocarbon service, as defined by ISO 15156. All the requirements of NACE MR 0175/ISO 15156 (latest edition) shall be applied.

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All other carbon steel items containing hazardous or hydrocarbon process fluids willhave a minimum corrosion allowance of 1.5 mm.Materials selection shall be performed with the aim of minimising life cycle costs over thelife of the asset.

4.5 Design Life

The design life shall be at least 25 years, or as specified in the equipment data sheet.

4.6 Pressure Vessels

All pressure vessels, which are part of the scope of supply, shall comply with PressureVessel Specification 180530–00–ME–SPC-0001.

4.7 Repair to Castings

The repair of defects in castings is not allowed by welding or by plugging except whenis permitted by PETROM.

4.8 Coatings

Coatings may be applied to provide items with protection against degradation and

thereby reduce their life cycle costs (either by extending the life of the item concernedor by reducing other materials costs). Coatings shall be appropriate to the materialsand environment to which they are exposed. For a specific application, the selectedcoating shall have a design life commensurate with the item it is intended to protect.Surface preparation, coating application and testing shall be performed in accordancewith the coating manufacturer's recommendations and shall conform to therequirements of EN/ISO 12944 Parts 1 to 8 and “PAINTING AND COATINGSPECIFICATION” 180530–00–ME–SPC-0003. Wherever possible, coatings shall beapplied in controlled environments and the use of "field" coatings shall be limited tocoating repairs and unavoidable "field joints". Any item that requires insulation /lagging shall be provided with a protective coating.

4.9 Nameplate

Nameplates shall be corrosion-resistant and shall extend beyond the equipmentsurface by the required insulation thickness.In addition to that required by the design Code, nameplates shall bear the following asa minimum:

• Manufacturer, Manufacturer's Serial Number, Date of Manufacture, PurchaseOrder, Equipment Tag Number, National Registration Number if applicable.Model Number, Manufacturer's serial number

•

Power, speed• Performance characteristics as applicable (e.g. Flow Capacity, Pumping head

etc.)

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4.10 Spares

SUPPLIER shall advise two individual lists for start-up / commissioning and two yearsoperating spares, and complete the relevant forms as requested in the material requisition.

For capital spares or additional requirements refer to below specific Sections 5, 6 and 7.The spare part lists shall be prepared in accordance with Project Specification 180530–00–ME–PHL-0001 “Sparing Philosophy”.

4.11 Special Tools

Any special tools required for erection, commissioning or maintenance shall be identified in theSUPPLIER's bid and supplied with the equipment.

4.12 Technical Audit

COMPANY reserves the right to appoint a third party to review the design or attendFactory Acceptance Tests on behalf of it.The Designer shall make all relevant documentation available in a timely manner.COMPANY 's appointed third party shall give the designer an undertaking to keep thedesign information confidential.

4.13 Preservation for Shipping

It shall be assumed that the equipment may spend 6 months in outdoor storage andthis shall be taken into account. The designer's operating manual shall be included inthe packing.

4.14 Certification and Marking

All pressure boundary materials shall have Certified Material Test Reports (CMTRS).Certificates shall be to SR EN 10204:2004 Type 3.1 for pressure and load bearingparts and Type 2.2 for other parts.

Stamping of materials shall be carried out with low stress stamps.

All equipment and associated accessories shall bear the CE mark and beprovided with Certificate of conformity to show compliance with the applicable EUDirectives.

4.15 Documentation

Each compressor package shall be documented according to applicable authorityrequirements and to contractual requirements specified in the material requisition.

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PETROM SA

EXPLORATION &

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5 CENTRIFUGAL COMPRESSORS

5.1 General

All centrifugal compressors, drivers and all ancillaries shall be designed andmanufactured in accordance with the requirements of API Standard 617, 7th edition,July 2002, except where amended by the comments in below Section 5.3.SR EN ISO 10439 “Centrifugal Compressors” may be proposed as an alternativecode; however the use of alternative codes will require written approval by theCompany.

5.2 Prototype Models

All proposed designs shall have satisfactory experience for a minimum of10000 hours at the operating conditions. As an alternative the designer shall demonstrate that the proposed design issimilar to previous designs with satisfactory service experience and that theproposed design will be suitable for the intended purpose. The designer shallsubmit supporting documents for this purpose.

5.3 Comments to API 617

Following are the additions, decisions and modifications to the correspondingparagraph numbers of API 617, Seventh Edition 2002.

Any bullet paragraph not addressed in this Specification will either be covered in thecompressor data sheet or deemed to be not required if referred to in the API as 'whenspecified'.

5.3.1 Chapter 1 – General Requirements

1. SECTION 1 - GENERAL

1.5 Definition of Terms

1.5.55 (New) "Addition" adds the requirement following this term to the referenced API Standard

requirement. An addition does not change the API Standards requirement.

1.5.56 (New) "Modification" changes the API Standard requirement to that which follows the term.

All parts of the API Standard requirement which are not addressed remain applicable.

1.5.57 (New) "Decision" provides direction for choices which are specified by the API Standard

paragraph. Parts of bulleted paragraphs which do not require decisions are fully

applicable.

1.5.58 (New) "Clarification" indicates purchaser's interpretation of clauses in the API Standard.

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EXPLORATION &

PRODUCTION DIVISION


Vendor shall be responsible for the coordination of and the expense of shippingbetween the component manufacturer's facility and the vendor assembly or testingfacility. The Vendor with unit responsibility shall also be responsible for the shipmentof equipment back to the original manufacturing facility for all components, which arediscovered in the course of testing to be unacceptable.

• Participation in Constructability, Maintainability, and HAZOP reviews as required.

2. SECTION 2 – BASIC DESIGN

2.1 General

2.1.1.3 (Add) The SUPPLIER shall use the specified values of gas analysis and mass flow to verifythe specified molecular weight, specific heat ratio, inlet volume flow and compressibility

factors. Where discrepancies occur, the SUPPLIER shall resolve these with

COMPANY/CONTRACTOR prior to the purchase order.

2.1.2 (Mod) The equipment (including auxiliaries) shall be designed and constructed for a minimum

service life of 25 years and at least 2 years of continuous operation.

(Add) The compressor and its auxiliaries shall be suitable for periods of idleness of several

months duration under the specified site conditions, without requiring any special

maintenance procedures.

2.1.5 (Mod) Air shall be used as the cooling medium. Cooling water is not recommended.

2.1.6 (Mod) The equipment shall be arranged to minimise Site erection work. Oil systems and seal

systems shall be integrated within the compressor baseplate, if practical. All rotating

equipment shall have free access to lifting equipment and to be arranged for ease of

maintenance.

All piping services within the baseplate limits shall be fully manifolded (where suitable) and

terminated at the baseplate edge in flanged connections. The manufacturer shall provide

within the baseplate limits all necessary control, non-return and isolating valves. Isolation

valves shall have free and safe access.

2.1.9 (Add) The sound level of the centrifugal compressor package boundary shall not exceed 85

dB(A) at 1 meter (or as defined by the package noise data sheet).

The SUPPLIER’S proposal shall state clearly how the specified sound level limits will be met.

2.1.14 (Mod) "local and/or international codes as specified by the COMPANY e.g. IEC regulations.

2.1.16 (Clar) Compressors shall be suitable for field run on air.

The SUPPLIER shall provide air performance curves, operating guidelines and any

additional/special features required for operation of the compressors in his proposal.

2.1.17 (New) The SUPPLIER shall provide an option in his proposal for capital spares. For eachsize of compressor casing, a complete spare rotor assembly including couplings shall be

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quoted. For two or more identical compressors only, one common spare rotor assemblyshall be quoted.

Capital spares shall be subjected to the same guarantees and warranties as the main

equipment.

2.2 Materials

2.2.1 General

2.2.1.2 (Mod) Materials shall be identified in the proposal with the nearest equivalent Americanmaterial specification including the material grade.

2.2.1.6 (Add) Plate material in contact with sour gas shall be HIC tested.

2.2.1.17 (New) Asbestos shall not be used in any form. The use of polychlorinated byphenyls(PCB’s) is not acceptable.

2.3 Casings

2.3.1 Pressure-Containing Casings

2.3.1.3 (Clar) Cast iron casing material is not acceptable.

2.3.1.4 (Add) A rotor bundle removal system shall be provided for radial split casings. A cradle shall

be provided for handling the removed bundle.

Axially split casings using O-rings on the flange facing are not acceptable.

2.3.2 Pressure Casing Connections

2.3.2.1 General

2.3.2.1.1 (Mod) All connections shall be flanged.

2.3.2.1.8 (New) Bolt holes on all flanges shall be fully back or spot faced.

2.3.2.3 Auxiliary Connections

2.3.2.3.1 (Clar) All internal cavities in the casing shall be individually drained terminating in a block

valve at the skid edge. All sour gas handling connections shall be provided with double block

and bleed valve arrangements.

2.3.2.3.3 (Sub) Threaded connections are not permissible, all connections shall be socket welded or

flanged.

2.5 Rotating Elements

2.5.10 Impellers

2.5.10.1 (Sub) Impellers shall be of the closed type, consisting of hub, disc, vanes and cover and

shall have backward leaning vanes. Impellers and its components shall not be of a riveted or

cast construction.

Welded, milled or vacuum brazed impellers shall be required.

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Welded and vacuum brazed impellers shall consist solely of forged parts and all surfaces tobe machine finished

Each impeller shall be marked with a unique identification number.

Careful consideration shall be given in impeller selection to impeller eye inlet Mach number.

Designs with gas velocities above Mach number 0.8 at any location in the compressor shall

be subject to approval of the COMPANY. These values should be given in the proposal.

(Add) The stress of all rotating parts shall be computed in regard of yield strength of the

metal at overspeed. Those parts include impellers, shaft sleeve, spacers, balance piston and

coupling hub.

The SUPPLIER shall clearly indicate the maximum calculated stress to the maximum

allowable stress. For propane and sour service applications, a FEA (Finite Element Analysis)

shall be provided for each stage.

2.6 Dynamics

2.6.1 General

2.6.1.4 (Clar) This paragraph is applicable. The SUPPLIER proposal shall state the critical speeds

of all shafts in the system.

2.6.2 Lateral Analysis

2.6.2.1 (Add) The critical speed analysis shall be made assuming the possibility of replacement of a

non-lubricated coupling by a continuously lubricated coupling.

2.6.2.6 (Dec) This paragraph is applicable. A train lateral analysis shall be required for machinery

trains with rigid or torsional flexible couplings.

2.6.2.13 (Sub) Calculated critical speeds falling within the separation margin specified in Chapter 1,

Para 2.6.2.10 are not acceptable.

2.6.2.14 (Dec) This paragraph is applicable.

2.6.2.15 (New) The calculated unbalance response curve showing shaft deflection vs. rotor running

frequency at each bearing and at the midspan shall be provided for EPC Contractor/

Company review.

2.6.3 Unbalanced Rotor Response Verification Test

2.6.3.1.1 (Add) The test shall be performed with the contract bearings and seals prior to the

mechanical tests. If the need for a sensitivity test shows up during the mechanical tests or

performance tests, the test shall be repeated after the additional weights are removed and

rotor balance is checked.

2.6.5 Level I Stability Analysis

2.6.5.1 (Add) Level I analysis shall be included in SUPPLIER’S proposal.

2.6.6 Level II Stability Analysis

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2.6.6.1 (Add) Level II analysis shall be included in SUPPLIER’S proposal if required from level Ianalysis result.

2.6.7 Torsional Analysis

2.6.7.1 (Dec) This paragraph shall be applied in any case.

2.6.7.2 (Add) Sources of excitation shall also include one times and two times electrical power line

frequency for units having electric motor drivers.

(Add) Vendor shall calculate the response to short circuit and start-up torques.

2.6.7.5 (Sub) Calculated torsional natural frequencies falling within the margin specified in para

2.6.7.3 are not acceptable.2.6.7.6 (Add) Variable speed drive (VSD) to be added to synchronous motors.

2.6.8 Vibration and Balancing

2.6.8.2 (Add) Rigid rotors shall have a minimum of three balancing planes.

(Add) The dynamic balance of the rotor shall be verified after installation of the coupling hub.

2.6.8.11 (Add) Where the total runout (electrical and mechanical) is equal to or more than a quarter

of the value of double amplitude given above, the demagnetisation of the rotor at the

SUPPLIER’s expense may be requested.

2.8 Shaft End Seals

2.8.1 General

2.8.1.1 (Dec) In the absence of specified settle out conditions, the compressor and seal support

system shall be suitable for the average of the highest specified discharge pressure and the

corresponding specified suction pressure. [Settle out pressures for Refrigeration

compressors are to be based on the pressure developed by evaporation at the highest

ambient or solar temperature specified]. The SUPPLIER shall verify with

COMPANY/CONTRACTOR].2.8.1.7 (Dec) This paragraph is applicable.

2.8.2 Clearance Seals

(Add) This type of seal shall not be used for flammable or toxic gas services.

(Add) The seals shall also be pressurised where starting could cause the suction pressure to

dip below atmospheric pressure.

2.8.3 Oil Seals

(New) Oil seals are not applicable unless otherwise specified.

2.8.4 Self-acting Dry Gas Seal

2.8.4.1

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a) (Clar) When dry gas seals are specified, the dry gas shaft seal and entire sealing systemshall be suitable for the following range of operating conditions:

As specified on Data Sheet.

• Shaft at rest with casing pressure equal to settle out pressure as shown on Data

Sheet

• Acceleration and deceleration

• Low pressure operation

• Reverse rotation for short durations

b) Shaft seals shall be of the self-acting dry gas seal type. A tandem seal arrangement shall be

required consisting of a main primary seal, secondary seal and an intermediate labyrinth, and

a labyrinth / carbon ring type tertiary seal.

A seal gas system complete with all necessary filters, pressure control and instrumentation

shall be supplied.

Dual seal gas filters shall be required complete with change-over valves, vent valves, drains

and instrumentation, to monitor and allow maintenance during continuous operation. All

piping and fittings downstream of the filters shall be stainless steel.

Instrumentation shall be supplied to monitor seal performance and provide remote indication

in the event of seal failure. A separation seal shall be provided between the isolating seal and the bearing, and shall be

purged to ensure isolation from the bearings and to ensure that any isolation seal gas

leakage is kept well below the lower explosive limit. The vent purge is to be vented to

atmosphere and alarm and shutdown shall be provided to detect seal failure or excess gas

leakage. Purge media shall be proposed by SUPPLIER and agreed by the COMPANY.

c) The gas leakage from the main primary gas seal and the isolation seal shall be stated and

guaranteed with the deviation to be expected between as new and worn status.

Factory tests at the seal SUPPLIER’S facility are required to demonstrate the correct design

and manufacture of the seals and that guaranteed leakage values have not been exceeded.

Process gas shall be filtered and used as buffer gas, if suitable.

3. SECTION 3 - ACCESSORIES

3.1 Drivers

3.1.3 (Sub) The compressor/driver train shall be capable of starting when pressurised to suction

pressure and with the recycle valve open. The thrust bearing shall be capable of

withstanding any transient loadings occurring during start-up and shutdowns, including the

ability to start up from settle out pressure.

3.1.5 (Add) SUPPLIER shall size and supply electric motors fully installed on the baseplate.

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Induction motors shall comply with Project specification 180530-00-EL-SPC-XXXX “GeneralSpecification for Electric Motors”. It is the SUPPLIER’S responsibility to size and supply the

couplings.

3.1.7 (Add) Unless otherwise agreed upon, Gas turbine drivers shall have a power margin of atleast 7% between the gas turbine site rated power and driven load maximum powerrequirements at the gas turbine output shaft plus compressor manufacturer's +4% guaranteetolerance (i.e. 11% total) in any specified ambient air condition.

3.2 Couplings and Guards

3.2.2 (Add) Dry diaphragm or flexible element type load couplings shall comply with API 671 and

shall be required between gearbox and compressor and between adjacent compressors.

Coupling hubs shall be hydraulically fitted keyless hubs where removable hubs are required

for maintenance purposes. Heating of hubs for installation/removal is specifically prohibited.

Supply of gear type couplings requires the COMPANY’S specific agreement. Gearboxes

should preferably have flanged shaft ends.

The SUPPLIER shall furnish the necessary pump, hoses and fittings, pressure gauges and

any other equipment required for installation and removal of hydraulically fitted coupling

hubs.

3.3 Mounting Plates

3.3.1 General3.3.1.1 (Dec) In all cases, the equipment shall be furnished with a baseplate.

3.3.1.2.2 (Add) All components directly connected to the compressor, such as gear reducers and

drivers, shall be provided by the SUPPLIER with a minimum ¼ inch (6.3 mm) stack of

stainless steel (ASTM A240 Type 316) shims (not laminated shim stock) between their

supports and the top of the baseplate to facilitate field alignment.

3.3.2 Baseplates

3.3.2.4 (Dec) Non-skid decking or grating shall be provided on top of the baseplate.

3.4 Controls and Instrumentation

3.4.1 General

3.4.1.2 (Add) All controls and instrumentation for package units shall be in accordance with Projectspecification 180530-00-IN-SPC-XXXX “Instrumentation and Control for Packages”.

3.4.1.3 (Add) All controls and instrumentation shall be designed in accordance with Projectspecification 180530-00-IN-SPC-XXXX “Instrument Design Specification”.

3.4.1.5 (Add) All instrumentation shall be installed in accordance with Project specification 180530-00-IN-SPC-XXXX “Instrument Installation”.

3.4.2 Control Systems

3.4.2.2 (Add) The SUPPLIER shall supply an anti-surge control system and, if required by thePurchaser, a load sharing system.

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permission before proceeding with any repairs which may affect equipment operation,integrity or interchangability. Repair procedures shall be approved by COMPANY beforerectification. Rejections made by COMPANY shall be final.

4.3 Testing

4.3.1 General

4.3.3 Overspeed Test

4.3.3.1 (Mod) Any permanent deformation of the bore or other critical dimension outside drawing

tolerances shall be cause for rejection.

4.3.6 Mechanical Running Test

4.3.6.1.2 (Clar) Plots showing synchronous vibration amplitude and phase angle versus speed for

acceleration and deceleration shall be made before and after the 4 hour run. These shall be

Raster (waterfall) type plots. Plots shall be made of both the filtered (once per revolution)

and unfiltered vibration levels. The speed range covered by these plots shall be zero to the

specified driver trip speed.

4.3.6.2.2 (Dec) This paragraph is applicable.

4.3.8 Optional Tests

4.3.8.1 Performance Test

(Dec) Performance test is required. When numbers of fully identical machines are ordered

(including spare rotors), performance test shall be carried out for at least one set of machine.

4.3.8.2 Helium Test

(Dec) Compressors in hydrogen rich gas service shall be leakage tested with helium in

accordance with this requirement.

4.3.8.4 Auxiliary Equipment Test

(Dec) This paragraph is applicable.

4.3.8.5 Post-Test Inspection of Compressor Internals

(Dec) This paragraph is applicable.

4.3.8.6 Full-Pressure/Full-Load/Full-Speed Test

(Dec) Unless otherwise approved by COMPANY, for one train of each compressor item, this

test shall be carried out together with the complete unit test.

4.3.8.8 Spare Parts Test

(Dec) Unless otherwise specified:

Any rotating component (rotor, gear) shall undergo a mechanical running test.

Spare dry gas seal cartridges shall be tested at full speed and full pressure at seal Vendor’s

shop.

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The rise in discharge pressure from normal operating point to surge point related to thenumber of impellers in a compression stage, shall not be less than shown below:

Number of Impellers 1 2 3 4

Minimum % increase in discharge pressure

(abs) from normal operating point to surge

point.

4.0 4.5 5.0 6.0

The head developed at 115% of normal capacity and normal speed, shall be not less thanapproximately 85% of the head at the normal operating point.

The turndown or stability range of any compressor or compressor section, at normal speed

and normal unthrottled suction pressure, shall not be less than 20%.

2.3 Casings

2.3.1.1 (Add) The maximum allowable working pressure of the casing shall also be suitable for the

discharge pressure at surge at maximum specified inlet pressure.

(Add) The SUPPLIER shall indicate in his proposal, the maximum pressure for the casing. In

all cases, the compressor casing and auxiliaries shall be able to withstand the pressuresetting of safety valves associated with the process. The pressure will be defined later if notspecified in the data sheet.

2.3.1.3 (Add) Radial split (barrel) casing and head cover plate shall be forged steel.

2.3.1.6 (Add) For radial split casings a shear ring design is preferred. Where bolted covers are

offered they shall be designed to allow the use of hydraulic bolt tensioning devices which

shall be provided as part of the vendor's special tools.

2.3.4 External Forces and Moments

2.3.4.1 (Sub) – Equation 2.E-1a in Annex 2E shall be modified to:

Fr + 1.09 Mr < 54.1 De

And equation 2.E-5a shall be modified to:

Fc + 1.64 Mc < 40.4 Dc

2.4 Guide Vanes, Stators, and Stationary Internals

2.4.5 (Add) Vendor shall state in his proposal the maximum allowable differential pressure across

diaphragms separating intermediate discharge and suction connections.

2.4.8 (Add) Diaphragms shall be designed such that they can be removed without disassembly of

the rotating element.

2.4.11 (New) Vane entrances and exits shall not have knife-edges.

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2.5 Rotating Elements2.5.3 Shafts

2.5.3.1 (Add) Shafts shall be forged steel and shall be ultrasonically examined prior to machining.

2.5.3.4 (New) The compressor SUPPLIER shall jointly with the driver SUPPLIER, establish the

maximum transient torques that will occur in the shafting system under start-up, running,

fault, and critical speed conditions. All components including the coupling, and the fit of the

coupling hub on the shaft, shall be suitable for at least 175% of this maximum transient

torque figure.

Motor driven trains shall be designed to withstand 3 phase short circuit torques and re-

acceleration torques.

Shear pin couplings shall not be used without the COMPANY’S specific approval.

2.7 Bearing and Bearing Housings

2.7.1 General

2.7.1.2 (Clar) Each radial bearing shall have two thermocouples or RTD’s embedded in the bottom of

the highest loaded shoe. Two thrust bearing pads on each side, 180° apart, shall be

furnished with duplex thermocouples or RTD’s suitable for connection to indication and alarm

instruments. All sensors shall be permanently cabled up to the local junction box at the skid

edge. The indicating device shall indicate two levels : one for the alarm and one for tripping

and shall be set individually and connected to sensing points.

2.7.2 Hydrodynamic Radial Bearings

2.7.2.1 (Clar) Radial bearings shall be of the tilting pad type and shall be split for ease of assembly

and removal. SUPPLIER shall advise capabilities and limitations for reverse rotation.

SUPPLIER shall provide design calculation for bearing sizing.

2.7.2.4 (Clar) Sufficient damping of bearing design is not permitted.

2.7.2.6 (New) The main load pads of radial bearings shall be fitted with a minimum of two duplex PT

100 four-wire RTD’s embedded in the pads and supplied complete with extension wires andconnected to a locally mounted terminal box.

2.7.3 Hydrodynamic Thrust Bearings

2.7.3.1 (Add) The SUPPLIER shall advise capabilities and limitations of the thrust bearing design

considering reverse rotation and load carrying capacity. SUPPLIER shall provide design

calculation for bearing sizing.

2.7.3.8 (New) The pad of active and inactive sides of the thrust bearing shall be fitted with a

minimum of two duplex PT 100 four wire RTD’s embedded in the pads and supplied

complete with extension wires and connected to a locally mounted terminal.

2.8 Shaft End Seals

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2.8.2 (Clar) Refer to the same paragraph stated above in Chapter 1 of API 617.2.8.3 (Clar) This paragraph is applicable. All seals except labyrinth type shall have shaft sleeves.

4. SECTION 4 - INSPECTION, TESTING AND PREPARATION FOR SHIPMENT

4.3 Testing4.3.3 Optional Tests4.3.3.1 Performance Test

4.3.3.1.2 (Add) For variable speed compressors the slope of the surge line shall be verified by

measuring the head and flow at the surge point at maximum continuous speed and at 90%

speed.(Add) In evaluation of performance test results, any Reynolds number correction factor shallbe agreed between CONTRACTOR/SUPPLIER.

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6 RECIPROCATING COMPRESSORS

6.1 General

All reciprocating compressors, drivers and all ancillaries shall be designed andmanufactured in accordance with the requirements of API Standard 618, 4th edition,June 1995, except where amended by the comments in below Section 6.3.


All proposed designs shall have satisfactory experience for a minimum of10000 hours at the operating conditions.

As an alternative the designer shall demonstrate that the proposed design issimilar to previous designs with satisfactory service experience and that theproposed design will be suitable for the intended purpose. The designer shallsubmit supporting documents for this purpose.


All reciprocating compressors, drivers and all ancillaries shall conform to therequirements of API Standard 618, 4th edition, June 1995, as amended by thefollowing comments.

Following are the additions, decisions, clarifications and modifications to thecorresponding paragraph numbers of API 618.

6.3.1 Section 1 - General

1.4 Definition of Terms

1.4.38 (New) - "Addition" adds the requirement following this term to the referenced API Standardrequirement. An addition does not change the API Standards requirement.

1.4.39 (New) - "Modification" changes the API Standard requirement to that which follows the term. All parts of the API Standard requirement which are not addressed remain applicable.

1.4.40 (New) - "Decision" provides direction for choices which are specified by the API Standardparagraph. Parts of bulleted paragraphs which do not require decisions are fully applicable.

1.4.41 (New) - "Clarification" indicates PURCHASER's interpretation of clauses in the API Standard.

1.5 Referenced Publications

1.5.2 (Dec)- The SUPPLIER shall comply with applicable Federal, State or Local codes,regulations ordinances, and rules. Unless defined otherwise these shall be those applying to

the country or state where the equipment is to be installed.1.6 (Add) – All data shall be expressed in metric unit except pressure which will be in barg.

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6.3.2 Section 2 – Basic Design

2.1 General

2.1.1 (Mod)- The equipment (including auxiliaries) shall be designed and constructed for a servicelife of 25 years, or as specified in the equipment data sheet.

(Add) - The SUPPLIER shall only offer reciprocating compressors that have been used insimilar design for the same or similar conditions.

(Add) - The compressor and its auxiliaries shall be suitable for periods of idleness of severalmonths duration under the specified site conditions, without requiring any specialmaintenance procedures. The SUPPLIER shall specify on the proposal the maximum

allowable idleness time.

(Add) - For the purpose of establishing the total cost of ownership over the design life of theequipment, the SUPPLIER shall provide the reliability and life cycle data.

Typically, this data will include:

− Mean Time Between Failures (MTBF)

− Mean Time to Repair (MTTR)

− Mean Time Between Overhauls (MTBO)

− Mean Time to Overhaul (MTTO).

2.1.2 (Clar)- The SUPPLIER's proposal shall state clearly how the specified sound level limits willbe met. The sound level of the reciprocating compressor package boundary shall not exceed85 dB(A) at 1 meter (or as defined by the package data sheet).

2.1.3 (Mod)- Air shall be used as the main cooling medium. Intermediate water-cooling in closedloop is acceptable if required because of space limitations.

2.1.6 (Add) - The equipment shall be arranged to minimise Site erection work. All rotatingequipment shall have free access to lifting equipment and to be arranged for ease ofmaintenance.

2.1.7 (Clar)- "local and/or international codes as specified by the PURCHASER, e.g. IECregulations".

2.1.11 (Mod) - The performance of the package is only the responsibility of the SUPPLIER. All factorwhich may adversely affect site performance of the package shall be checked and rectified

by the SUPPLIER.(Deletion) - Delete “when specified” in this paragraph.

2.1.12 (Add) - Compressors shall be designed for full load continuous duty.

They must be able to operate at the differential pressures consequent to vacuum operationsand continuous duty in the range of the expected partial loads.

(Dec)– The capacity at the normal operating point shall have no negative tolerance.Maximum acceptable positive tolerance is 3%.

2.1.14 (Dec)- Refer to the data sheet for equipment location and environment.

2.1.16 (Add) – SUPPLIER shall clearly indicate in his proposal any limitation or particularprocedures for partially or fully unloaded operation requirements as a result of the specifiedoperating data and/or start-up/stopping sequence of the compressor.

2.1.20 (New) - Unit Responsibility. The compressor SUPPLIER shall have unit responsibility for allequipment unless otherwise stated. Unit responsibility means being responsible for the entire

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The compressor Supplier shall verify that excitations (gas side or mechanical stemming fromthe machine) do not cause impermissibly high amplitudes and stresses to the piping.

2.5.2 (Add) - For compressors with variable speed drivers, the SUPPLIER shall perform aresponse analysis of the rotating system during all possible resonance conditions which mayoccur over the complete operating speed range. All possible excitation frequencies andconsequent torques shall be considered.

2.5.5 (New) - The compressor manufacturer shall jointly with the drive manufacturer, establish themaximum transient torques that will occur in the shafting system under start-up, running,fault, and critical speed conditions. All components including the coupling, and the fit of thecoupling hub on the shaft, shall be suitable for at least 175% of this maximum transienttorque figure.

Motor driven trains shall be designed to withstand, 3 phase short circuit torques, and re-acceleration torques.

2.6 Compressor Cylinders

2.6.1 General

2.6.1.2 (Mod): Unless otherwise specified, horizontal cylinders shall be provided, which shall havetop suction and bottom discharge. The arrangement of valves and ports shall be such as toensure complete drainage of cylinders. In order to avoid condensation inside the cylinder, theSUPPLIER shall make sure that the cylinder internal surface temperature never falls belowthe dew point of the handled gas.

2.6.2 Cylinder Appurtenances

2.6.2.3 (Dec)- Cylinders shall be equipped with dry liners. Cylinders without liners are notacceptable.

2.6.3 Cylinder Cooling

2.6.3.1.3 (Dec)- A pressurized thermosyphon system for cylinder cooling shall not be used.

2.6.3.1.4 (Add) - A single closed cooling system may be used for more than one compressor:However it shall be sized considering all the served compressors in operation, includingstand-by units if any.

2.7 Valves and Unloaders

2.7.3 (Add) - The design of valves shall aim for maximum valve life by employing, for example,

minimum valve lift and rigid plates or discs. If valves are required to operate with different gascompositions, the SUPPLIER shall clearly state in his proposal for which of the gascomposition the valve design has been optimized and what restrictions are to be appliedduring operation with other gases.

2.7.5 (Add) - All valves located at the bottom side of a cylinder shall be provided with anarrangement to retain the complete valve assembly, including cage, in position while thecover plate is removed or installed.

2.7.7 (Add) - Valve spring shall be made of corrosion resistance material.

2.7.9 (Dec)- The SUPPLIER shall submit a written valve dynamics report to the PURCHASER.

2.7.11 (Dec)- Paragraph 2.7.11 will apply.

2.7.12 (Mod)- Unless otherwise specified, cylinder unloading shall be furnished and all lines to andfrom the unloaders shall be 316L stainless steel. Cylinder unloading shall be achieved bymeans of valve depressors. Plug type unloaders and valve lifters shall not be used.

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and post-lubrication, the operation of which shall be integrated into the compressor staringand shutdown sequence.

2.12.4 (Add) - Air-cooled heat exchangers designed for 17% extra surface area for fouling and withminimum 2x100% fans shall be supplied for lube oil cooling. Oil coolers shall be provided tomaintain the oil supply temperature at/or below 55°C. Air cooler shall be in accordance with API 661.

2.12.6 (Add) – Filter shall be dual flow with change over transfer valve, differential pressure alarmand indication facilities.

2.12.7 (Dec)- A thermostatically controlled, electric immersion heater shall be provided, ifnecessary. Compressor packages without heaters shall not have any starting/operatinglimitation due to the minimum ambient temperature.

2.13 Cylinder and Packing Lubrication

2.13.1.1 (Dec)- Cylinder and Packing lubrication shall be by means of “divider block” mechanicallubricator system driven by a separate electric motor.

2.13.1.4 (Dec)- A heating device shall be provided for lubricator reservoir if required because ofminimum ambient temperature or start-up condition.

2.14 Materials

2.14.1 General

2.14.1.1 (Add) - Gray cast iron shall not be used for compressor cylinders.

2.14.1.6 (Clar) - The COMPANY/CONTRACTOR will specify the gas composition and any erosiveagents present in the gas stream or in the environment. If concentration of these erosiveagents is not quantified, the SUPPLIER shall state any concentration limitation required forhis compressor to suit his material selection.

2.14.1.10 (Add) - All materials exposed to H 2S gas service shall be in accordance with NACE MR0175/ ISO 15156.

In Non-Sour Service, for Carbon and Carbon Manganese Steel parts, the carbon contentshall be 0.25% maximum and the carbon equivalent (C.E.) shall be 0.45% maximum.

Where C.E. = C + Mn/6 + (Cr + Mo +V)/5 + (Ni + Cu)/15

2.14.1.14 (New) - For pressure containing parts the selected material shall be suitable to operate atspecified minimum ambient temperature.

2.14.6 Repair to castings and Forgings

2.14.6.1 (Add) - Welded or brazed repairs on cast iron components are prohibited. Weld proceduresfor all major repair welding on pressure-containing parts shall be submitted toCOMPANY/CONTRACTOR for approval prior to commencement of repair.

2.14.7 Welding

2.14.7.5.1 (Dec)– All welding of pressure-containing parts shall be subject to 100% radiography.

6.3.3 Section 3 - Accessor ies

3.1 Drivers

3.1.1 General

3.1.1.1 Refer to the data sheet for the type of driver required.

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(Add) - SUPPLIER shall consider full flow relief valve condition at the discharge and minimumsuction condition for driver sizing.

3.1.2 Motor Drivers

3.1.2.1 - 3.1.2.5 - 3.1.2.13 - (Mod)- The design of Electric Motors shall conform to the ProjectSpecification 180530-00-EL-SPC-XXXX “General Specification for Electrical Motors” andsuitable for the area classification, gas grouping and temperature classes specified in thedata / Requisition sheets.


3.2.1 Couplings

3.2.1.2 (Dec)- Couplings and coupling mounts shall comply with API 671.

3.2.2 Guards

3.2.2.1 (Add) - Guards shall be non-sparking type.

3.3 Reduction Gears

3.3.1 (Add) – Gears with power transmission above 150 kW shall conform to API 613. HoweverISO 6366 may be used as an alternative code although each individual gear unit shall beapproved by the Company.

3.4 Belt Drives

3.4.1 (Dec)- Belt Drives shall not be used for reciprocating compressors.

3.5 Mounting Plates

3.5.1 General

3.5.1.1 (Clar)- The equipment shall be furnished with a heavy-duty, single fabricated steel baseplatefor the complete compression unit.

3.5.1.2.5 (Clar)- Horizontal jackscrew shall be provided to the mounting plates for each compressorcomponent that weighs more than 50 kg to facilitate longitudinal, transverse and verticaladjustments.

3.5.1.2.9 (Add) - All components directly connected to the compressor, such as gear reducers anddrivers, shall be provided with a minimum ¼ inch (6.3 millimetres) stack of stainless steelshims (not laminated shim stock) between their supports and the top of the baseplate orsoleplate to facilitate field alignment.

3.5.1.2.12 (Mod/Dec) – Anchor bolts shall be furnished by the SUPPLIER.

3.6 Controls and Instrumentation

3.6.1 General

3.6.1.1 (Add) - All controls and instrumentation shall be in accordance with Project specification180530-00-IN-SPC-XXXX “Instrumentation and Control for Packages”

3.6.1.3 (Add) - All instrumentation design and installation shall be in accordance with ProjectSpecifications 180530-00-IN-SPC-XXXX “Instrument Design Specification” and 180530-00-IN-SPC-XXXX “Instrument Installation”.

The compressor shall be supplied with all instrumentation, process, hydraulic and pneumatic

tubing and piping, local interconnecting equipment and local panel(s), as required for theSUPPLIER to complete the mechanical installation, calibrate all instruments, test installationequipment, pre-commission loops, in order to enable the package to be commissioned ready

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for safe operation.The SUPPLIERs proposed standard instrument types shall be subject to review and approvalby CONTRACTOR.

3.6.1.9 (New) - Each piston rod of a horizontal compressor shall be provided with a non-contactingprobe for rod run-out measurement. The probe shall be located in the distance piece on thepacking case flange and shall be wired to an outside junction box where the proximiter isinstalled.

(New) - The junction box shall provide plugged type connection for portable run-outequipment


3.6.2.3 (Add) – SUPPLIER shall state in the proposal the extent of unloading required for start-up.

3.6.3 Instrument and Control Panels

3.6.3.1 (Add) - The SUPPLIER shall provide a PLC Control Panel suitable for installation asspecified in the package data sheet.

Each compressor control panel shall be designed to accommodate dual power supplies from AC and/or DC UPS systems.

3.6.4 Instrumentation

3.6.4.5 Relief Valves

3.6.4.5.1(Deletion) – Delete “When specified”

3.6.4.5.4(New) – Brass or cast iron safety relief valves and fittings are not permitted. All safety reliefvalve shall have flanged inlet and outlet connections.

3.6.5 Alarms and Shutdowns

3.6.5.1 (Add) – SUPPLIER shall add the following alarms and shutdowns to table 4:

- High lube oil outlet temperature alarm.

- High jacket water outlet temperature alarm

- Excessive cylinder jacket water temperature alarm and shutdown

- High rod-drop “run-out” alarm

3.6.7 Vibration and Position Detectors

3.6.7.1 (Add) - Machine condition monitoring equipment shall be part of the compressor SUPPLIER’sscope of supply. For each compressor train this scope shall include, but not be limited to:

- Bearing temperature sensors for compressor and drive motor

- Vibration sensors and key phasor sensor

- Monitors for bearing temperature, vibration and key phasor

- Condition Monitoring Data Gathering System

Vibration monitoring shall be performed by means of accelerometer or non-contactingproximity probes.

The overall high-level process control and safeguarding of the plant and equipment shall beperformed by the PURCHASER’s DCS and ESD System. However, local machine controland protection shall be provided by the SUPPLIER.

In the case that this arrangement is not possible, each compressor shall be provided with aLocal Control Panel to be connected to the main Control Systems.

3.6.7.4 (Dec)- Contact type rod-drop detectors shall not be used (see item 3.6.1.9.above).

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3.7 Piping and Appurtenances

3.7.1 General

3.7.1.5 (Dec)- SUPPLIER shall supply all process and auxiliary piping in accordance with Projectspecification 180530-00-PI-SPC-0002 “Pipe Classes and Material Specification”..

3.7.1.7 (Mod)- Delete “When specified”.

3.7.1.14 (Clar)- Each utility connection e.g. air, gas, cooling water shall be manifolded to a commonconnection.

3.7.1.15 (New) - SUPPLIER shall clearly identify, on schematic drawing, all piping required insulationor heat tracing.

3.7.4 Coolant Piping3.7.4.3 (Deletion) - Delete “When”

3.7.6 Process Piping

3.7.6.3 Pulsation suppression devices and temporary start up screens (just upstream of suctionpulsation suppression device) shall be supplied by SUPPLIER.

3.8 Intercoolers and Aftercoolers

3.8.1 (Mod)– Air cooled heat exchanger shall be supplied in accordance with API 661.

3.9 Pulsation and Vibration Control Requirements

3.9.1 Pulsation and Vibration Control Requirements3.9.1.a (Clar)– Pulsation Suppression devices at suction and discharge side of each cylinder shall be

supplied by the SUPPLIER.

3.9.1.d (New) – Use of intercoolers/Aftercoolers as pulsation suppression devices are notacceptable.

3.9.2 Design Approaches

3.9.2.1 (Dec)- Design Approach 3 shall be utilized for pulsation and vibration control.

3.9.2.8 (Dec)- Replace “should normally be specified” with “shall be performed”.

3.9.3 Pulsation Suppression Devices

3.9.3.1 (Add) - Pulsation suppression equipment shall be designed and fabricated in accordance

with Project Specification 180530–00–ME–SPC-0001 “Pressure Vessel Specification”.3.9.3.14(Clar)- Connections to process piping, including inter-stage piping, shall be flanged.

Machined and studded connections are not acceptable.

3.9.4 Supports for Pulsation Suppression Devices

(Dec)Paragraph 3.9.4 shall apply.

6.3.4 Section 4 - Inspect ion, Testing, And Preparation For Shipment

4.1 General

(Add) - The SUPPLIER shall provide at least 15 working days notice to the PURCHASER for

any hydrostatic, and mechanical test. This amount of notice shall also be given for the datewhen equipment will be ready for final inspection prior to shipment.

Refer to the data sheet for PURCHASER’s requirements for witnessed tests.

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4.1.4 (Add) The SUPPLIER shall provide a quality control plan showing the proposed programmeof inspection and testing and which items are to be witnessed or observed. This plan will bereviewed by the COMPANY who will advise any required amendments. The SUPPLIERshall provide a copy of his quality control procedures for COMPANY’S review.

4.1.4.2 (Add) - The SUPPLIER shall provide test results from the preliminary test to thePURCHASER at the time of the witness test notification so the PURCHASER can be surethe equipment is ready for witness test.

4.1.6 (Dec) This paragraph is applicable.

4.2 Inspection

4.2.1 General

4.2.1.5 (New) COMPANY’S inspector shall be informed of any defects noticed during manufacture.SUPPLIER shall also inform COMPANY and obtain his permission before proceeding withany repairs which may affect equipment operation, integrity or interchangability. Repairprocedures shall be approved by COMPANY before rectification. Rejections made byCOMPANY shall be final.

4.2.3 Mechanical Inspection

4.2.3.3 (Dec)- A final cleanliness inspection shall be performed on all the compressor piping and allappurtenances furnished by the SUPPLIER.

4.2.3.4 (Dec)- Hardness verification shall be required whenever hardness limitations are specified orwhenever process gas components have been specified which would require limitedhardness materials to prevent stress corrosion cracking.

4.3 Testing

4.3.2 Hydrostatic and Gas Leakage Tests

4.3.2.6 (Mod)– Change 30 minutes to 60 minutes.


4.3.3.1 (Add) - The SUPPLIERs test procedures shall be submitted to COMPANY / CONTRACTORfor approval.

4.3.3.2 (Dec)– The units, including integral auxiliary system packages, shall receive a 4-hourmechanical running test before shipment.

(Dec)- Auxiliary system consoles can be separately tested.

4.3.3.6 (Dec)- Whether to dismantle or not after a test shall be the joint decision of the PURCHASERand SUPPLIER.

4.3.4 Other Tests

4.3.4.4 (New) – Complete unit test shall be performed on each compressor type.

4.4 Preparation for Shipment

4.4.3.2 (Mod)– Exterior surfaces, except for machined surfaces shall be painted in accordance withProject Specification 180530-00-ME-SPC-0003 “Painting and Coating Specification” (refer toabove Clause 4.7).

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7 ROTARY TYPE POSITIVE DISPLACEMENT COMPRESSORS

7.1 General

Rotary type positive displacement compressors, drivers and all ancillaries shall bedesigned and manufactured in accordance with the requirements of API Standard 619,Fourth Edition, 2004, except where amended by the comments in below Section 7.3.

Standard air compressors for light duty may be designed and manufactured inaccordance with International Standard ISO 10440: 2001 -Rotary Type PositiveDisplacement Oil-free Compressors for General Refinery Services Part 2- Packaged Air Compressor.


All proposed designs shall have satisfactory experience for a minimum of10000 hours at the operating conditions.

As an alternative the designer shall demonstrate that the proposed design issimilar to previous designs with satisfactory service experience and that theproposed design will be suitable for the intended purpose. The designer shallsubmit supporting documents for this purpose.


All Rotary type positive displacement compressors for heavy duty gas process service,drivers and all ancillaries shall conform to the requirements of API Standard 619,Fourth Edition, 2004, as amended by the following comments.

Following are the additions, decisions, clarifications and modifications to thecorresponding paragraph numbers of API 619.

7.3.1 Section 2 – Normative References

2.5 (New) - The SUPPLIER shall comply with applicable Federal, State or Local codes,regulations, ordinances, and rules. Unless defined otherwise these shall be those applying tothe country or state where the equipment is to be installed.

7.3.2 Section 3 – Definit ion of Terms

3.65 (New) - "Addition" adds the requirement following this term to the referenced API Standardrequirement. An addition does not change the API Standards requirement.

3.66 (New) - "Modification" changes the API Standard requirement to that which follows the term.

All parts of the API Standard requirement which are not addressed remain applicable.

3.67 (New) - "Decision" provides direction for choices which are specified by the API Standard

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PETROM SA

EXPLORATION &

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paragraph. Parts of bulleted paragraphs which do not require decisions are fully applicable.3.68 (New) - "Clarification" indicates PURCHASER's interpretation of clauses in the API Standard.

7.3.3 Section 5 - Basic Design

5.1 General

5.1.1 (Mod) - The equipment (including auxiliaries) covered by this standard shall be designed andconstructed for a minimum service life of 25 years and at least 3 years of uninterruptedoperation, or as specified in the equipment data sheet.

(Add) - The compressor and its auxiliaries shall be suitable for periods of idleness of severalmonths duration under the specified site conditions, without requiring any specialmaintenance procedures.

(Add) - For the purpose of establishing the total cost of ownership over the design life of theequipment, the SUPPLIER shall provide the reliability and life cycle data.

Typically, this data will include:

− Mean Time Between Failures (MTBF)

− Mean Time to Repair (MTTR)

− Mean Time Between Overhauls (MTBO)

− Mean Time to Overhaul (MTTO).

5.1.8 (Clar) –Air cooled systems shall be utilised.

5.1.9 (Clar) - All piping services within the baseplate limits should be fully manifolded (where

suitable) and terminated at the baseplate edge in flanged connections. The manufacturershall provide within the baseplate limits all necessary control, non-return and isolating valves.

5.1.16 (Dec) – Paragraph 5.1.16 shall apply.

5.1.17 (Dec) – Paragraph 5.1.17 shall apply.

5.1.18 (Clar) - "local and/or international codes as specified by the PURCHASER eg. IECregulations.

5.1.19 (Clar) - The sound level at the rotary compressor package boundary shall not exceed 85 dBA@ 1 metre.

5.1.21 (Clar) - For lubricated screw machines an oil removal system shall be provided to remove oilin the air stream down to 1 ppm by weight or better. In the event that the SUPPLIER isresponsible for the supply of air drying equipment he shall liaise with the dryer manufacturer

to ensure that "poisoning" of the dryer absorbent material is avoided. Inter and/oraftercoolers shall be provided with water removal sections and auto drains, high level alarmsand manual drain valves.

5.1.25 (New) – Any required pressure vessels shall comply with Project Specification 180530–00–ME–SPC-0001 “Pressure Vessel Specification”.

5.2 Pressure Casing

5.2.10 This paragraph should apply.

5.6 Seals

5.6.1 General

5.6.1.1 (Clar) - Seal type shall be SUPPLIER proven type for the service and pressure specified

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PETROM SA

EXPLORATION &

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5.7 Dynamics5.7.1 General

5.7.1.5 (New) - Only compressor configuration of known and proven dynamic behaviour shall beoffered and the critical speeds declared shall be known and proven values.

5.7.3.3 (Dec) – Balance grade ISO 1940 Grade 1.0 shall be applied as criteria for balance check ofassembled rotors.

5.8 Bearings

5.8.1 General

5.8.1.5 (Dec) – Paragraph 5.8.1.5 shall apply.

5.11 Materials

5.11.2 Castings

5.11.2.5.1 (Mod) - Ferrous castings shall NOT be repaired by peening, plugging, burning in orimpregnations.

5.11.2.5.2 (Mod) – Cast iron castings shall not be repaired.

7.3.4 Section 6 – Accessories

6.1 Drivers

6.1.2 Motors

6.1.2.2 (Add) – SUPPLIER shall use and supply electric motors fully installed on the baseplate.Induction motors shall comply with Project Specification 180530-00-EL-SPC-XXXX “GeneralSpecification for Electric Motors”.

6.1.4 Gear Units

6.1.4.1 (Dec) – Gears shall conform to ISO 13691 (API Standard 613)


6.2.1 (Mod) - Coupling type shall be SUPPLIER’s standard for the application specified subject toPURCHASER’s approval.

6.3 Mounting Plates6.3.2 Baseplates

6.3.2.1 (Clar) - Baseplates shall support the compressor, driver, L.O. tank and systems, oilseparation equipment and local control panel.

6.3.2.5 (Add) - The adequacy of the lifting lugs and their attachment welds shall be demonstrated bythe SUPPLIER during manufacture and certification provided.

6.3.2.7 (Clar) – Non-skid decking or grating shall be provided on top of the baseplate.

6.3.2.10 (New) - Low point (plugged) drains for spillage shall be provided in the baseplate insufficient numbers to ensure that all sections of the baseplate are catered for.

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PETROM SA

EXPLORATION &

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6.4 Controls and Instrumentation6.4.1 General

6.4.1.2 (Clar) – All controls and instrumentation for package units shall be in accordance with ProjectSpecification 180530-00-IN-SPC-XXXX “Instrumentation and Control for Packages”

6.4.1.3 (Clar) – All instrumentation design and installation shall be in accordance with ProjectSpecifications 180530-00-IN-SPC-XXXX “Instrument Design Specification” and 180530-00-IN-SPC-XXXX “Instrument Installation”.

6.4.1.6 (New) -Electrical Installation in Packages and shall generally be in accordance with IECrecommendations.


6.4.2.1 (Clar) - The method of control will be specified in the data sheet.

6.4.3 Instrument and Control Panels

6.4.3.1 (Add) – The UCP (Unit Control Panel) shall be PLC based, suitable for installation asspecified in the package data sheet.

6.4.4 Instrumentation

6.4.4.3 Vibration and Position Detectors

6.4.4.3 (Add) - Unless specified elsewhere the SUPPLIER’s shall provide their standard protectionsystems for the duty specified.

6.5 Piping

6.5.1 General

6.5.1.7 (New) - All piping within the limits of the skid shall be provided by the SUPPLIER and shallcomply with Project specification 180530-00-PI-SPC-0002 “Pipe Classes and MaterialSpecification”. Any non ANSI or API flange connected to PURCHASER’s piping shall beprovided with mating flanges (supplied loose).

6.6 Intercoolers and Aftercoolers

6.6.1 (Mod) The intercooler and aftercooler shall be air cooled type as per API 661.

6.6.9 (Dec) - Intercoolers and aftercoolers shall be skid or machine mounted.

6.7 Inlet Air Filter

6.7.1 (Add) - The air intake filter shall be dry type filter complete with suction silencer and suitablefor outdoor installation. As a minimum, the casing material shall be all 316L SS. The filterhousing may be mounted at grade. The air intake filter shall be provided with local differentialpressure gauge and transmitters for remote indication and alarm.

7.3.5 Section 7 - Inspect ion, Testing And Preparation For Shipment

7.1 General

7.1.1 (Add) - The SUPPLIER shall provide at least 15 working days notice to the PURCHASER forany hydrostatic, mechanical or performance test. This amount of notice shall also be given

for the date when equipment will be ready for final inspection prior to shipment. Refer to thedata sheet for PURCHASER’s requirements for witnessed tests.

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PETROM SA

EXPLORATION &

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7.2 Inspection

7.2.3 Mechanical Inspection

7.2.3.3 (Dec) - A final cleanliness inspection shall be performed on all the compressor piping and allappurtenances furnished by the SUPPLIER.

7.3 Testing


7.3.3.1 Requirements Prior to the Mechanical Running Test

7.3.3.1.1 (Add) – The contract package shall be tested as a complete unit.

7.3.3.1.9 (Clar) Seismic test values shall be taken.7.3.3.1.10/11 (Mod) These paragraphs are not applicable.

7.3.3.2 Speed Requirements for the Mechanical Running Test

7.3.3.2.1 (Mod) The mechanical running test shall be run at the operating speed for not less than 2hours (continuously) after stabilisation of all operating conditions.

7.3.3.4 Requirements after the Mechanical Running Test is Completed.

7.3.3.4.4/5 (Mod) These paragraphs are not applicable.

7.3.3.5 Heat Run

7.3.3.5.1/2 (Mod) This paragraph is not applicable.

7.4 Preparation for Shipment

7.4.3.i) (Add) - If spreader beams are required to lift the package without damage a spreader beam,slings and shackles shall be provided by the SUPPLIER.