Wall thickness according to ASME B31.4

[swapnil gorantiwar]

Dear all,

            i have querry regarding wall thickness calculation in accordance with ASME B31.4, please reply on below querry.

 

Querry: According to paragraph 404.1.2, wall thickness of streight pipe under internal pressure formula shows

1) t=PD/2S

2) t=PD/20S

Which formula to be considered for wall thickness calculation of pipe in pipeline?

In which case formula varies?

 

I know this querry is not regarding the welding, then also anybody know this can reply.

Thanking you.

 

 

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Best Regards,

Swapnil Gorantiwar

[rahul...@akersolutions.com]

Hello Swapnil,

 

Both calculation formula will give same results,

 

Please follow the unit convention as specified in Notations.

1) t=PD/2S The Normal formula is applicable with Parameters values for Pressure, Diameter and Allowable stress in Psi, Inch and Psi , respt. and your thickness will be in INCHES

 

2) ( t=PD/20S ), formula is applicable with Parameters values for Pressure, Diameter and Allowable stress in Bar, mm and Mpa and your thickness will be in mm.

 

Hope this clarifies well...

 

reg

Rahul Pisat

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From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of swapnil gorantiwar
Sent: Tuesday, July 21, 2009 8:22 AM
To: material...@googlegroups.com
Subject: [MW:2731] Wall thickness according to ASME B31.4