As per AME B31.3 table 331.1.1 Requirement for Heat Treatment For P1 materials PWHT requirement for > 20mm thickness, so you can used without PWHT cover WPS for production joint, its applicable only in-general requirement of piping other wise it will be stated your piping specification.
PINAKI..
On Tue, Jul 10, 2012 at 4:10 PM, Biplab Pal <biplab.mech@googlemail.com> wrote:
Dear Experts,
I am using SA106 Gr.B, Process GTAW+ SMAW, Electrode ER70 S-6 & E
7018. BW, Construction code ASME B 31.3. WPS is as per Sec IX and
client(No impact Requirement) Material thickness is max 18 mm.
I have doubts regarding PWHT.
My WPS is qualified with PWHT below lower critical temperature but
Impact Test is not required.
1) Can i use this WPS as a production joint with/ without PWHT.
2) If PWHT is done for this joints, is there any mandatory NDT after PWHT.
3. For BF & SW is welded there is LPT requirement as per code ASME B
31.3 that LPT must be done at root run. If PWHT is not done is it
mandatory to perform LPT after Final welding.
Please try to answer me with the code requirement as well as
Recommended Practice for Refinery Project.
--
Thanks & Regards
Biplab Pal
Mechanical Inspector (PMT)
YASREF Project
E-mail: biplab.mech@gmail.com
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Thanks & Regards
Pinaki Boxi.
Deputy Manager(QA/QC)
IOT-Paradip Site
Mob-+919178466059
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