Dear Vishwas,
If you want avoid the PWHT localized and the impact test, review the engineering specification for this vessel, what is required, the qualified WPS, type of process and electrodes used.
if you buttering with ENiCrFe2 and finish with E-309, you are creating a dissimilar weld on the vessel. Does the qualified WPS authorize it?
Regards,
Ramon Briceño
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De: materials-welding@googlegroups.com <materials-welding@googlegroups.com> en nombre de Vishwas Keskar Welding Manager WELDING <vvkeskar123@gmail.com>
Enviado: viernes, 29 de octubre de 2021 3:47 a. m.
Para: Materials & Welding <materials-welding@googlegroups.com>
Asunto: [MW:32577] SA 516 GR 70- AVOIDANCE OF PWHT - 40 mm thickness
Enviado: viernes, 29 de octubre de 2021 3:47 a. m.
Para: Materials & Welding <materials-welding@googlegroups.com>
Asunto: [MW:32577] SA 516 GR 70- AVOIDANCE OF PWHT - 40 mm thickness
The vessel details are
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MOC - SA 516 GR 70
DIAMETER- 4020mm
LENGTH - 37 MTR
MDMT = - 50 Deg C to + 250 Deg C
SERVICE - Non lethal /No Hydrogen Service
We are proposing Vessel length build up as per FURNACE LENGTH CAPACITY(24 m maximum) and one joint WITHOUT PWHT ( JOINING PWHTed sections earlier at site )
Proposal -
1.MOC - SA 516 GR 70
2.BUTTERING - ENiCrFe2 on 24 m section end and other at 13 m section end)
3,PWHT (section PWHT - One of 24 length and other 13 m)
of - 620 Deg C - 125 MINUTES
of - 620 Deg C - 125 MINUTES
4.Bevel preparation
5.NDT - DPT
Welding at site ( 24 m section with 13 m section) - ENiCrFe2 OR E309
6.NDT - DPT AND UT
Expert opinion please and share experience if any
Vishwas
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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