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gapee
Active Contributor

Join Date: Jan 2010
Posts: 14

Pipe Thickness

01/15/2010 9:42 AM

Hi ,to calculate the minimum pipe wall thickness we need to three data entry

please explain about this data and the table we should use if possible use an example for me thk's

1-QUALITY FACTOR

2-CORROSION ALLOWANCE(for exp. for carbon steel pipe what's wrong some use2mm and another one use 3 mm)

3-COEFFICIENT
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PennPiper
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Engineering Fields - Piping Design Engineering - Retired Piper

Join Date: Feb 2007
Location: Bayonet Point, Florida
Posts: 635
Good Answers: 61
#1

Re: pipe thickness

01/15/2010 12:53 PM

I think someone has given you some wrong information.

Yes, it is good to know and apply the three factors you have , but there is more.

  • The Material of the pipe - There is a BIG difference between Copper pipe and 9-Chrome pipe
  • The Maximum Operating Temperature
  • The Maximum Operating Pressure
  • The Applicable Piping Code (B31.1, B31.3, B31.4, etc.)
  • The Commodity
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Abdel Halim Galala
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Engineering Fields - Piping Design Engineering - New Member Egypt - Member - Member since 02/18/2007

Join Date: Feb 2007
Location: Cairo, Egypt
Posts: 1733
Good Answers: 248
#2

Re: Pipe Thickness

01/15/2010 11:37 PM

See my post #7 of CR4 Thread Piping Standards for Calculating Minimum Wall Thickness, and from where, see a lot of CR4 Threads.

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Abdel Halim Galala
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Engineering Fields - Piping Design Engineering - New Member Egypt - Member - Member since 02/18/2007

Join Date: Feb 2007
Location: Cairo, Egypt
Posts: 1733
Good Answers: 248
#3
In reply to #2

Re: Pipe Thickness

01/16/2010 11:28 AM

• For longitudinal weld joint efficiency E (quality factor Ej), see Table 302.3.4 of ASME B31.3:

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