Petroleum Community Forum - Pressure limit and Design pressure the same?

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Pressure limit and Design pressure the same?
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Jay_Piping Inspector

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Published on 10-28-2015 09:25 PM

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Hi everyone!!

I have a question, we have this Piping Material Classification document and according to this we have a pressure temperature limit at 260 psi and 200 deg. C respectively. I want to verify if these can be the design pressure or the test pressure?

Originally Posted by JUANPE

You must to know what is the allowable stress. Actually as per B31.3 allowable stress values at design temperature for piping materials shall not exceed two-thirds of corresponding yield strength.

Originally Posted by JUANPE

It is obvious, as per above with 1.5 times of design pressure value for hydrotest there wouldn't be any possibility that the hydrotest pressure to be exceeded the yield strength.

Originally Posted by Jay_Piping Inspector

Dear Juanpe,

Originally Posted by Jay_Piping Inspector

Thanks for the reply. As of the moment the only data I have are Piping Material Specifications. Please see if these data can help

Originally Posted by Jay_Piping Inspector

Attachment 7571 Attachment 7572Dear Juanpe,

Originally Posted by Jay_Piping Inspector

Thanks for the reply. As of the moment the only data I have are Piping Material Specifications. Please see if these data can help
.
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