Code Responsibility
Code Responsibility
(OP)
In the manufacture of raw materials for a pressure vessel, where does the material manufacturers responsibility leave off and the pressure vessel manufacturers begin?
As an example, the construction code is ASME VIII and the raw materials are castings. Limited information is given by the purchaser/vessel manufacturer other than listing applicable specifications which do or may apply.
Is it adequate to meet the material specification only and assume that impacts are exempted for the application if they aren’t a part of the material specification. Must welding (casting repair)and subsequent PWHT meet the requirements of ASME VIII in addition to qualification per ASME IX or simply follow the material specification? I’ve encountered this debate a few times and am of the opinion that meeting the material specification first and subsequently following ASME VIII for additional criteria, particularly welding/PWHT is the correct process. The customer should be responsible for calling out impacts and any NDE above and beyond an 80% quality factor. I would like to know how others view this type of situation.
As an example, the construction code is ASME VIII and the raw materials are castings. Limited information is given by the purchaser/vessel manufacturer other than listing applicable specifications which do or may apply.
Is it adequate to meet the material specification only and assume that impacts are exempted for the application if they aren’t a part of the material specification. Must welding (casting repair)and subsequent PWHT meet the requirements of ASME VIII in addition to qualification per ASME IX or simply follow the material specification? I’ve encountered this debate a few times and am of the opinion that meeting the material specification first and subsequently following ASME VIII for additional criteria, particularly welding/PWHT is the correct process. The customer should be responsible for calling out impacts and any NDE above and beyond an 80% quality factor. I would like to know how others view this type of situation.





RE: Code Responsibility
RE: Code Responsibility
RE: Code Responsibility
What about the material suppliers for Section III Applications?
Is it correct that material supplier for Section III applications is certified and qualified?
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN
RE: Code Responsibility
Sorry, but I do not get involved with ASME B&PV Code, Section III.
RE: Code Responsibility
RE: Code Responsibility
RE: Code Responsibility
When fabrication is performed to ASME Section VIII, Div 1 all technical requirements for PWHT, weld repair, etc., are done to this code book section. The material specification requirements are only part of the final equation, at the end of the day, the manufacturer of the pressure vessel has to answer to the AI regarding all requirements in Section VIII for compliance, not a material specification requirement.