Stress Relieving and Radiographic Testing Requirement on Boiler and Pressure Vessel

[Asadullahkhan]

My Questions are:

1) Is stress relieving "necessary" on Boilers and Pressure vessels between thickness (10-20 mm) for Operating Pressure of 10 Bars under new ASME Code?

2) Is Radiography required for above said thicknesses if weld efficiency is reduced to 90% ?

Thanks!

 

[metengr]

Your question cannot be answered as stated. You need background information as to material and application. Boilers are in a different code book section in comparison to pressure vessels.

 

[Asadullahkhan]

Ok if I say. A WHRB boiler having capacity of 1000 kg/hr steam operating pressure is 10 bar manufactured on ASME Sec 1
Material is SA516 Gr70 for the shell and tube sheets.
Smoke tubes are SA 106 Gr B

 

[metengr]

Please read the code for your answers.

 

[bpv66]

These answers are found in ASME Section I; PW-11 for volumetric examination requirements and PW-39 for post weld heat treatment requirements.

 

[Asadullahkhan]

Ok thanks. I will review it.