The starting point for a material selection would be a construction code such as ASME Section VIII Div. 1. Your material UNS A97075 is not listed in Div. 1, and also not listed in Div. 2. You can not use this material in Code pressure vessels.
You can build small pressure vessel as a non-code...
I assume that you are dealing with a UCS material, no process PWHT necessary. Here are some Code statements:
UCS-56 (a): PWHT is required when the nominal thickness, as defined in UW-40(f), exceeds the limits in Table UCS-56. (This means that not all welds require PWHT).
UW-40 (a) (5)...
The name of Russian PV Code is: ?? 03-576-03 ??????? ?????????? ? ?????????? ???????????? ???????, ?????????? ??? ????????? (Rules of Construction and Safe Operation of Pressure Vessels). This Code was revised in 2003. You can follow this link to see the document in Russian...
Hi,
Your question is of a jurisdictional matter pretty much. After the vessel was finally completed and final ASME stamp was applied, ASME rules will be no longer applicable. From this point, any welding to pressure retaining elements will be regulated by a local Jurisdiction. If adopted by...
Hi, steamer1966,
I understand, this is a repair that shall be done by R-Stamp holder in accordance with NBIC.
After 20 years of service there may a lot of invisible micro-cracks that may initiate a crack propagation after welding. Therefore, the first step should be a thorough examination using...
Hi,
An UM stamped vessel without a NB number was still built per ASME Code and can be repaired per NBIC including a Code Stamping. Moreover, NBIC is applicable not only to an ASME stamped items but to any pressure retaining item, does not matter, it was registered with the National Board or...
Hi,
Shariku ot Bobika.
This is not a “Newton Binomial problem”. Per UG-102 (b) a rule about a gage range “not less than 1.5 not more than 4 times the test pressure” is only applicable to a dial pressure gages. For digital pressure gages a wider range is allowed.
Thanks
Hi,
The standard domestic (potable) hot water storage tanks are usually built per ASME Section IV with HLW Code Stamp. Max design temperature is 210 F and MAWP 150 psi. Such tanks usually have anticorrosive lining inside.
Thanks,
Answer: the National Board.
Each candidate for AI first becomes a NB Commissioned Inspector, see a link: http://www.nationalboard.org/Index.aspx?pageID=6&ID=28
Then he takes A-Endorsement exam at NB and becomes an AI.
Each AI is annually issued a Commissioned Inspector card with at least...
Per Sect VIII-1 Scope (U-1(a)(2):
pressure vessels are containers for the containment of pressure...Also, per U-1(c)(2)(e) piping components are exempt.
Per 2007 Edition of the NBIC, Para. 4.4.2, for an alteration test you may use a) Liquid Pressure Test; b) Pneumatic Test; c) Nondestructive Examination.
NDE may be conducted when contamination of the pressure-retaining item by liquids is possible of when pressure testing is not practicable...
Using 300# standard flange is definitely a better practice. Your non-standard flange will cause changes in the drawings and calculations. It may not in compliance with the customer specification and will need customer approval. This issue needs to be addressed in the Manufacturer's Data Report...
As said above by weldtek , RT shall be done after PWHT for high alloy steels per UHA-33. This is because a delayed cracking or post heat treatment cracking may happened in or adjacent to welds after PWHT. This is not applicable to UCS steels. Common sense: you always need to do RT before PWHT...
