Pipe Erection Procedure

 

  Pipe Erection Procedure





Proper planning should be made for erect piping.

1.     All tools, equipment’s, ropes must be inspected and certified by HSE, before erection to ensure that they are safe and ready clean and free from loose contamination.

2.     Pre-Fabricated spool need to be identified and number and tagged.

3.     Pipe should be erect and support provide as per Support drawing, primary pipe supports can be welded before erection. The number of temporary supports shall be minimized.

4.     Undue stress should not be applied to the force, piping keep in the proper place.

5.     To avoid the ingress of moisture, and pipe opening should be seal during erection.

6.     Installation of piping on pipe rack should be done from lower elevation to higher elevation.

7.     Large bore piping shall be installed before small bore piping.

8.     Piping joint shall be properly aligned.

9.     Pipe clearance from other pipes, equipment, and structure should be maintained.

Basic main point of Pipe Erection

v Cleaning of Piping Before erection.

v Piping Routine

v Slope

v Pipe Support

v Vent And Drain

v Valves

v Instruments

v Line Mounted Equipment’s items

v Bolts and Nuts & Gasket & Blinds. 

Installation of piping support

1.     Relevant pipe support details drawing should be used for installing pipe support.

2.     Additional Stress should not be introduced to fit the support.

3.     The pipe shoe should be installed at the center.

4.     Where Spring support require those should be locked until Hydrotest and Insulation.

5.     Where PTFE plate are used for friction reduction. Coefficient of friction 0.01.

6.     Piping to be arrange to facilitate pipe supporting and shall be well plan for easily removal of equipment’s and for inspection and servicing.

ERECTION: -

  • v Cleaning of Pipe before Erection
  • v Piping Routing
  • v Slopes
  • v Pipe Supports
  • v Vents & Drain
  • v Line Mounted Equipment’s/ Items
  • v Bolts & Nuts

 

1.     Cleaning of Pipe before Erection

·       Before Erection all pre-fabricated spool piece, pipes, Fittings, etc. shall be cleaned outside & inside by blowing compressed air by other mean, to remove all foreign matter.

·       Special Cleaning requirements for some services, if any shall be specified in the PMS & ISO.

2.     Piping Routing

·       No deviation from the piping route indicates in drawing are permitted without written constant of client.

·       Pipe to pipe, Pipe to Structure/ Equipment’s distance/ clearances as shown in the drawings shall be stickily followed.

·       In case of fouling of a line with other piping, structure, equipment’s etc. The matter shall be brought on client notice.

3.     Slopes  

·       Slopes Specified for various lines in the drawings / P & ID shall be mention by as per ISO.

4.     Pipe Support.

·       Location and design of pipe support shown in drawings for line 2”and above.

·       For line below 2” NB, contractor company shall fabricate and locates support in line with client standard.

·       Pipe shoe support always in pipe centre

·       Hanger rods should be installed inclined in a direction oppositive to the direction in which the pipe moves during expansion.

·       Pre-set pins of all spring support shall be removed only after hydrotesting and insulation is over.

v Following point shall be checked after insulation

·       All restraints have been installed correctly

·       Clearance have been maintaining as per support drawings

·       Insulation does not restrict thermal expansion.

·       All temporary tack welds provide during erection have been removed.

·       All welded supports have been welded.

5.     Vents & Drains

·       High point vent and low point drains shall be provided as per the instruction of clients if there is no show in drawings.

·       The details of vent drain shall be as per PMS/ Job Specification

·        

6.     Valves

·       Valve shall be installed with spindle/ actuator/ Position is show in layout drawings, in case of any difficulty in during installation spindle orientation position not shown in drawing then work done as per client requirements.   

·       Additional care shall be taken to ensure that Glove valve, check valve and other unidirectional are installed with flow direction arrow.

7.     Instruments

·       In line instruments such as restriction orifices, Control Valve, safety valve, Relief valve, Orifice’s flange.



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I am Afzal an experienced piping engineer from the last 8 years. Through this platform, I will share my experiences and knowledge with you in an innovative way. So be with me for the next couple of years!

For any Query  afzalpipingknowledge@gmail.com




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