PIPELINESDESIGN, CONSTRUCTION, OPERATION

ANDMAINTENANCE

PREPARED BY dr .MOUFFAK TAHA ALI

(dr_mouffak2005@yahoo.com)

COURSE OBJECTIVES

1. What is the function of pipelines? Classification of pipelines

2. Pipeline components

3. Pipes & pipe supports

4. Steel pipe specifications, pipe diameters

5. Expansion joints, post installation inspection

6. Pipeline design- Factors that affect the design process

7. Overview of standards that provide guidance on design, construction and

maintenance.

2AUGUST 2014

COURSE OBJECTIVES

8. Pipeline routing process, selection of pipeline route

9. Detailed design parameters

10. Choosing the appropriate material grade for the pipeline

11. Pipeline coating, pipeline protection

12. Pipeline construction and pipeline testing

13. Operation, operation problems

14. Pigging

3AUGUST 2014

WHAT IS THE FUNCTION OF PIPE LINES?

The most common means of transporting liquids and gases

What are the major differences between pipelines and other flow lines?

1.Pipelines have minimum number of curves, they have no sharp bends

2. Often either buried or inaccessible

4AUGUST 2014

CLASSIFICATION OF PIPELINESPipeline could be classified with respect to:

1. The fluid in the pipeline

Liquid

Gas

2. The pipeline buried under ground or overland or under the sea (submarine pipeline)

3. The function of the pipeline:

Gathering pipelines

Transportation pipelines, and

Distribution pipelines

5AUGUST 2014

THE TRANSPORTATION OF NATURAL GAS

Natural gas pipeline consist of:

1. The pipeline

2. The compression station

3. Metering station

4. Control valves & isolating valves

5. Control and operating station

6AUGUST 2014

PIPELINE COMPONENTS (EITHER LIQUID OR GAS)

1. Initial injection station (supply or inlet station)

2. Compressor / pump station

3. Partial delivery station

4. Block valve station (to isolate any segment of pipeline)

5. Pressure and flow regulating station

6. Final delivery station

7AUGUST 2014

PIPELINE COMPONENTS (EITHER LIQUID OR GAS)

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Pipeline components can be grouped into the following groups:

1. Pipes (include pipe supports, expansion joints..etc)

2. Valves (for isolation, control flow rate , control pressure,

prevent reverse flow, and as a safety device)

3. Pumping station

4. Compression station

5. Metering station

6. Control room

AUGUST 2014

PIPELINE COMPONENTS1. PIPES & PIPE SUPORTS

PIPE MANUFACTURING METHODS

1. Seamless pipe (pipes with no weld)

2. Electric resistance weld pipe (ERW)

3. Longitudinal-seam submerged –arc welded pipe (LSAW).

4. Spiral submerged arc-welded pipe (SSAW)

9AUGUST 2014

PIPE MANUFACTURING METHODS

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1. Seamless pipe (pipes with no weld)

AUGUST 2014

PIPE MANUFACTURING METHODS

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2. Electric resistance weld pipe (ERW)

AUGUST 2014

PIPE MANUFACTURING METHODS

12

3. Longitudinal-seam submerged –arc welded pipe (LSAW). AUGUST 2014

PIPE MANUFACTURING METHODS

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3. Longitudinal-seam submerged –arc welded pipe (LSAW).

AUGUST 2014

STEEL PIPE SPECIFICATIONS

The elements of steel pipe specification are:

1. Diameter (both external and internal)

2. Pipe nominal size

3. Nominal pipe wall thickness

4. Length of the pipe

5. The weight, the surface area(ASME B 36.10M and B 36.19) for

stainless steel pipes

14AUGUST 2014

STEEL PIPE SPECIFICATIONS

PIPE DIAMETERS

Steel pipe up to 12 inches The inside diameter is the nominal size

Steel pipe bigger than 12 inches The outside diameter is used as

nominal size diameter

15AUGUST 2014

EXPANSION JOINTS

What is the function of expansion joints?

It is used to provide some flexibility

1. The flexibility could be in axial direction to accept the thermal

expansion

2. It never be used in buried (underground) pipelines

3. Main applications in compressor station and pumping stations,

and rarely used in over ground pipelines

4. Flexible rubber joint is used also to eliminate transmission of

vibration

16AUGUST 2014

METALLIC EXPANSION JOINTS

17AUGUST 2014

FLEXIBLE RUBBER EXPANSION JOINTS

18AUGUST 2014

FLEXIBLE RUBBER EXPANSION JOINTS

19AUGUST 2014

FLEXIBLE RUBBER EXPANSION JOINTS

20AUGUST 2014

FLEXIBLE RUBBER EXPANSION JOINTS

21AUGUST 2014

PIPE SUPPORTS

What is the function of pipe supports?

1. Carry the weight of the pipeline + the fluid inside

2. Allow for thermal expansion in the pipeline

Types of pipe supports:

1. Fixed point supports (does not allow for any movement)

2. Floating point pipe supports

3. Hanged pipe supports which divided to:

Fixed height

Spring hangers

22AUGUST 2014

PIPE SUPPORTS

Pipe supports are used to carry the pipe in the following cases:

1. Inside the pumping /compression stations

2. In over-ground pipe lines

For buried pipe lines (under ground pipelines) no supports are

needed. The pipeline is supported completely on soft fine sand

23AUGUST 2014

FLOATING PIPE SUPPORT

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Metal clamp on support

AUGUST 2014

HANGED PIPE SUPPORTS – SPRING HANGERS

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Spring hangers:

1. Allow for the pipe to move in the vertical direction when

it is filled with liquid

2. Damp any vibration could happen during operation