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As the owner of a boiler, I have recalculated the ASME minimum wall thickness for tubing based on newer allowable stresses as allowed under NBIC 1998 Interpretation 98-14, questions 4 and 5. My question is do I necessarily have to file an R-2 form for this type of alteration where there is no...

Thank you for your replies. As both materials are included as acceptable materials in the BPVC and ASME B31.1, I do not believe that welding them together poses any issue with code compliance. So, it's really about the weld procedure. Would it be easier to weld P11 (1 1/4 Cr) or P22 (2 1/4 Cr)...

12,410 kPa (1800 psig)

Thank you, Dhurjati Sen. All of our boiler feedwater piping and valves are butt welded. This is common for our industry.

I am looking at the replacement of a check valve in a boiler feedwater line. The new valve is 5% Cr cast. The piping is A106 CS. Can this be done with the proper preheat, PWHT, and electrode selection? Is this weld even allowed in the ASME boiler code? Would there typically be a buttering...

I am looking at the replacement of a check valve in a boiler feedwater line. The new valve is 5% Cr cast. The piping is A106 CS. Can this be done with the proper preheat, PWHT, and electrode selection? Is this weld even allowed in the ASME boiler code? Would there typically be a buttering...

I am trying to understand the relative corrosiveness of aqueous ammonia (29%) in a carbon steel pressure vessel. I have found much reading about SCC in welds and HAZ of welds with anhydrous ammonia, but nothing for aqueous ammonia. All this is in an effort to set up and inspection program for...

Regarding note G4 in ASME Section II, Part D, Table 1A, could somebody please tell me what the phrase "are enclosed within a setting" means? Thank you. Trebormech

Does anyone else have some insight into what the phrase "are enclosed within a setting" means in note G4 of Section II, table 1A? Thank you.

Thank you MrBTU. So, would you consider tubes that are within the casing of a boiler, such as a gen bank tube, to be "within a shell"? Gen bank tubes are certainly a Section I application, but I am wondering if this implies some additional form of restraint or enclosure (like refractory)...

Hello, fellow engineers. Regarding note G4 in ASME Section II, Part D, Table 1A, could somebody please tell me what the phrase "are enclosed within a setting" means? Thank you. Trebormech

Thank you, all, for your responses.

Hello. I am working on the quality control for the installation of a steam header. The material is 2.25% Cr steel (P22). The header was prefabricated in a shop, but will require several field welds. Regarding PWHT of the field welds, how relevant is hardness testing as a quality control step...

Is there ever a case where sufficient NDE of boiler external piping can be done in lieu of a hydrostatic test? Case in point: Installing a new steam header in a multiple boiler facility where isolation for hydrostatic test would be difficult, if not impossible, due to the number of isolation...