Calulation of MAWP at PWHT temp
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Agrawal Sunil (Mumbai -Stequ)
May 23, 2008, 5:27:43 AM5/23/08
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As per UW40 (a)(4), when PWHT by
internal firing method the internal pressure should be kept as low as
practicable, but shall not exceed 50% of the maximum allowable working pressure
at the highest metal temperature expected during the postweld heat treatment
period.
How to calculate MAWP at PWHT temp (~ 600°C) since
allowable stress for SA 516 Gr. 70 is available upto 524°C only.
Best regards,
Sunil S. Agrawal
Static Equipment Dept. (STEQU)
Engineering & Design Tecnimont ICB
101/102, Interface-11, Link Road, Malad (w), Mumbai - 400 064 ( +91.22.6777.7237 * s.ag...@ticb.com
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