test pressure acc.to B31.4

[prens11us]

hello all
for a petroleum line,

Is the "test pressure" is 1.5 X "Design pressure" according to ASME 31.4

thanks in advance

 

[SJones]

1.25 minimum

Steve Jones
Materials & Corrosion Engineer

http://www.pdo.co.om/pdo/

 

[prens11us]

thank you steve.

Does it mean that I can use a value of 1.5 ?

regards

 

[SJones]

As 1.25 x is a minimum, use of 1.5 x would satisfy the requirement but you may wish to look at the stresses you will be inducing in the pipeline.

Steve Jones
Materials & Corrosion Engineer

http://www.pdo.co.om/pdo/

 

[amirparviz]

As per ASME B31.4 the minimum Test Pressure is 1.25 x internal design pressure subject that in your pipeline stress induced shall not exceed 90% of SMYS.
So you should check your profile and if any of these conditions are not satisfied change your test sections.

Parviz Farhadi
Piping Lead Engineer