GEORGIA

AZERBAIJAN

Caspian SeaBlack Sea

Turkey

IranIraq

Syria

THE EXISTING SOUTH CAUCASUS PIPELINE EXPORTS GAS FROM THE CASPIAN SEA SHAH DENIZ FIELD STARTING

FROM THE SANGACHAL TERMINAL (NEAR BAKU, AZERBAIJAN) THROUGH GEORGIA UP TO THE TURKISH BORDER. THE

690-KILOMETER PIPELINE INCLUDES A 442-KILOMETER SECTION IN AZERBAIJAN AND A 248-KILOMETER SECTION

IN GEORGIA. THE EXPANSION OF THE SOUTH CAUCASUS PIPELINE INVOLVES THE LAYING OF NEW PIPELINE ACROSS

AZERBAIJAN AND THE CONSTRUCTION OF TWO NEW COMPRESSOR STATIONS IN GEORGIA. THIS TRIPLES THE GAS

VOLUMES EXPORTED THROUGH THE PIPELINE TO OVER 20 BILLION CUBIC METERS PER YEAR.

SCP EXPANSION / AZERBAIJAN AND GEORGIA ONSHORE

EPC CONTRACTOR: CB&I / END USER: SOUTH CAUCASUS PIPELINE COMPANY / A JV BETWEEN: BP (OPERATOR), STATOIL, TOTAL, LUKOIL, NICO, TPAO, SOCAR

MV AND LV SWITCHGEAR

Skema’s Intelligent Power Motor Con-

trol Centers were designed to deal with

seismic loads at the following levels:

> Earthquake-proof construction:

Zone 4

> Peak Horizontal Ground

Acceleration: 0.83g

> Peak Vertical Ground

Acceleration: 0.59g

> Seismic Design Code:

ASCE 7/IBC 2000

The robustness of the modules was

tested in relation to the following

structural aspects:

> Resistance and stability for

individual modules

> Ground anchors

> Links between modules (bolts)

> Internal links to modules (rives)

In addition, Skema’s Switchgear was

successfully tested for seismic loads in

compliance with IEC 60068-3-3 (1 g).

The incomers, the bus-ties and the ACB

feeders of the PMCCs and the cells of

the MV switchgear are equipped with

protection relays configured accord-

ing to the IEC 61850 communica-

tion protocol. Goose signals are used

by the PMCCs to exchange informa-

tion, and by the MV cells to exchange

information and provide protection.

PACKAGED SUBSTATION

Skema supplied for the Project a 400V

Modular Primary Substation, a pre-

fabricated, modular enclosure inclu-

sive of all external appurtenances and

walkways, access ways and stairways.

The Packaged Substation is designed

for extreme outdoor conditions (-34°C

/+38°C) and incorporates the require-

ments for seismic, wind, snow and ice

loading, elevated at a typical 1,800

mm to underside of steel above site

grade on a steel support frame.

The Packaged Substation is composed

of two Modules:

> The Modular Primary Substation

(32,000 mm (L) x 4,000 mm (W)

x 3,500 mm (H) - weight 71,790

kg), designed to house MV 10kV

Switchgear, a 10/0.42 kV Trans-

former, LV electrical switchgear,

Motor Control Centers, CDAS and

PMS cabinets and LV distribution

boards

> The HVAC module (dimensions =

8,000 mm (L) x 4,000 mm (W) x

3,500 mm (H) - weight 19,000 kg),

used for conditioning and pressur-

ization of the substation

HVAC SYSTEM

The HVAC system consists of 2 pack-

aged air conditioning units suitable

for overpressure, cooling and heat-

ing control during summer and winter

conditions. The 2 redundant automat-

ic units (1 duty, 1 standby) are capa-

ble also of automatic changeover with

programmable timetable and a manu-

al mode is available for maintenance.

The units are installed indoor on a

dedicated Module adjacent to the

substation building and provide sup-

ply and recirculate air flow from/to

the electrical room.

The transformer room is provided

with 2 exhaust fans (1 duty, 1 stand-

by) and fresh air intake. A temper-

ature transmitter will be monitoring

the room temperature which will be

kept within the design limits through

the duty fan started by the HVAC Lo-

cal Control Panel. When the fans are

not operating, a non-return damper

isolates the indoor from the outdoor.

A static electric heater in the trans-

former room keeps the room at +5°C

during winter, in case the transform-

er is not running.

The fresh air intake for the HVAC

units and the transformer room has

been installed on the roof of the HVAC

module and of the substation, and it

has been realized with materials, di-

mensions and welding length suita-

ble to prevent any gas from entering

the substation.

The constant overpressure of the

building prevents entry of any airborne

contaminants that should be present

outdoor, and the filters included in the

HVAC packaged units ensure suitable

indoor ambient conditions.

FIRE & GAS SYSTEM

The Fire & Gas System has been de-

signed to prevent the presence of gas

and fire (by means of detectors) inside

the substation.

“The construction site manager has asked us to thank Skema for the way in which you have shipped and provided packing and as-sembly documentation for the Modular Sup-

port Frame. The site team were impressed with the individual marking of each piece of

the frame, identifying the container it is in and where it is located within it. The level

of detail Skema has provided has simplified the site assembly of the sub-frame and is

much appreciated.”

Procurement, Engineering & Construction

Skema acted as an EPC contractor for the solutions de-

livered, managing, coordinating and monitoring every

aspect of the project: detailed design, project manage-

ment, scheduling, procurement and expediting, QA/HSE

management, documentation, fabrication, all multidisci-

plinary installation activities (architectural, mechanical,

E&I, HVAC, etc.), and testing and pre-commissioning at

Skema’s facilities.

SOLUTIONS DELIVERED

PACKAGED SUBSTATION

MV 10 KV SWITCHGEAR (81 COLUMNS)

INTELLIGENT POWER MOTOR CONTROL CENTERS (409 COLUMNS, 1,201 DRAWERS)

DISTRIBUTION BOARDS (4 COLUMNS)

26 LOCAL CONTROL PANELS

EPC CONTRACTOR: CB&I / END USER: SOUTH CAUCASUS PIPELINE COMPANY / A JV BETWEEN: BP (OPERATOR), STATOIL, TOTAL, LUKOIL, NICO, TPAO, SOCAR