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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