weld overlay post weld heat treatment
weld overlay post weld heat treatment
(OP)
hi all,
Welding parameters are as follow:
Base metal: SA 350 LF2 (P No.1 & Gr. No.2)
Base metal thickness: 40mm
Overlay Incoly 625 and Overlay thickness: 3.5 mm
Filler metal: ERNiCrMo3 (AWS A:5.14 & F No.43)
Position: 1G
Pre-heat: Ambient & Inter-pass temperature : 200◦C max
Code: ASME IX
My question is that "PWHT is required or not ? Please advise me with code reference (ASME IX).
Regards
Welding parameters are as follow:
Base metal: SA 350 LF2 (P No.1 & Gr. No.2)
Base metal thickness: 40mm
Overlay Incoly 625 and Overlay thickness: 3.5 mm
Filler metal: ERNiCrMo3 (AWS A:5.14 & F No.43)
Position: 1G
Pre-heat: Ambient & Inter-pass temperature : 200◦C max
Code: ASME IX
My question is that "PWHT is required or not ? Please advise me with code reference (ASME IX).
Regards





RE: weld overlay post weld heat treatment
Second, ASME Section IX is a service code book section that provides the requirements for qualification of a welding procedure with or without PWHT, impact qualification and welder performance qualification, similar for brazing and now fusing of plastic or GRF pipe are considered.
RE: weld overlay post weld heat treatment
Regards
RE: weld overlay post weld heat treatment
Regards,
Mike
RE: weld overlay post weld heat treatment
RE: weld overlay post weld heat treatment
• Preheating nor PWHT is required for plates < 1.25”.
• Preheating (200F min) can be done in lieu of PWHT for plate 1.25 – 1.5” thick.
• Preheating (200F min) and PWHT is mandatory for plates >1.5” thick.
RE: weld overlay post weld heat treatment
(e) for corrosion resistant weld metal overlay cladding or for welds attaching corrosion resistant applied lining (see UCL-34)
provided preheat to a minimum temperature of 200°F (95°C) is maintained during application of the first layer when the thickness
of the pressure part exceeds 11/4 in. (32 mm).
RE: weld overlay post weld heat treatment
metengrs,
so in our case, PWHT is not required if we maintain pre-heat temperature 200°F (95°C minimum ) during application of the first layer??
RE: weld overlay post weld heat treatment
RE: weld overlay post weld heat treatment