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1
GASCO Internship Program
Internship focus – Mechanical Engineering
Mahin Rahman
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Abu Dhabi Gas Industries Limited (GASCO) is a natural gas producing company of Abu Dhabi, UAE.
It is a subsidiary of the Abu Dhabi National Oil Company (ADNOC).
The company had been established in 1975.
About Gasco
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Gasco
CH4 (Methane)
C2H6
(Ethane)
C6H14(2-
Methylpentane)
C5H12
(Pentane)
C4H10
(Butane)
C3H8
(Propane)
Production Network
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Products
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Daily Production:
Production Quantity
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Technical and Engineering Department
TEP TEM TEC TEE TER TEX TEI
Gasco’s TE department
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6
2
4
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Gas Processing Flow Diagram
Habshan
Asab
Buhasa
Bab
Power Grid (ADDC)
ADCO GASCO
Ruwais
MP-21
Borouge and other markets & Distributors
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Rotating Equipment
Piping
Pipeline
Static Equipment
HVAC
Topics covered in Mechanical and Civil Section at Gasco – TEM + TER
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Compressors Pumps Turbines ( gas & steam) Turbo-expander EnginesMotorsGears Bearings
Rotating Equipment At Gasco
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27 Aero derivative Gas Generators 45 Heavy Frame Gas Turbines 3 Industrial Gas Turbines 173 Gas Compressors + Blowers 30 Power Turbines 41 Steam Turbines 17 Turbo Expanders 82 Air Compressors and Chillers 32 Air Blowers
Total Rotating Equipment Fleet
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Example of Gas Turbine
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Difference Gas Turbine Steam TurbineCombustion Equipped with
Combustion ChamberExternal Combustion
Weight Heavy 100 tons Moderate 25 tonsFloor Space High machinery foot
printLow machinery footprint
Reliability Less. Due to many processes
High. Due to less processes
Principle Brayton Cycle Rankine Cycle
Differences between GT and ST
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Piping roles and layout Components Analysis and Software Materials Design Testing Pipe Connection
Piping and Pipeline at Gasco
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Design Layout for Piping
Layout
Plot Plan
Material
GA Drawing + Isometrics
Stress Analysis
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PRE-FEED includes:
Strategizing and Analyzing
Site Visits Observe plan of
work Produce scope of
work and requirements
Process of Piping - PreFEED
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Corrosion – Corrosion on the inner side of pipe due to flow of liquid or corrosive gases.
Bottle Necking – When the upstream capacity from ADCO cannot be handled.
Issues with Piping
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P&ID – Piping and instrumentation diagram physical orientation of equipments and their
geographical location (eg. Valves) Helps to generate Piping GAD’s
PFD – Process flow diagram – done by process engineers.
PFD shows the schematic of flow in a plant and deciding the direction of flow.
P&ID and PFD
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Most important feature of Piping – Use of valves and they are connected by either flanges or welds
Eg. of commonly used valves: Gate valve Check Valve Butterfly valve Eg. of other valves: Plug valve Globe valve Needle valve
Valves
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H – testing or Hydro testing – Passage of water through the pipes
Air flushing or Pneumatic testing – sometimes done due to infrastructure of plant area where H testing isn't suitable.
Nitrogen Flushing – In order to remove the Oxygen remnants.
Test for Piping
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Mostly buried due to protection and safety
Both onshore and offshore pipelines are used
For protection – 3 layer PE or PP outer covering is used
To avoid corrosion – Cathodic protection is applied for pipelines
Pipeline
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Rooting of Pipes
Welding at particular connections
Preheating
Press with roller
Radiography
H - Testing
Testing and Set up procedure for Pipelines
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Tanks
Pressure Vessels
Heat Exchangers
Static Equipment at Gasco
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Caesar II – Piping and Pipeline analysis
PDS(Pipeline Design System) or SPR(Smart plan Review)
HAP – Hourly Analysis Program for HVAC system
Foundation 3D – For Static Equipment like vessels, heat exchangers, and tanks
ASHRAE - American Society of Heating, Refrigerating, and Air-Conditioning Engineers
Use of Software
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Importance:
It is the core and foundation to any industry
Once made global, it is easy to interchange and perform trading
Creates opportunity in the market for all
Standards and Codes
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ASME – American Society of Mechanical Engineers
API – American Petroleum Institute
DGS – Design General Specifications – Gasco’s own compilation of standards and procedures collected from experience.
Standards followed by Gasco
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PIP – Process Industry Practice – generated from the point of view of Industry
IOGP - International Association of Oil and Gas Producers
They make developments about approaching a project and various solutions
Interactive Standards – Gives detailed analysis of construction, lifetime of product, maintenance, and safety procedures.
Other Standards and Codes
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Acknowledgement
s
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Thank You