PWHT Requirements for WPS

[pankaj pachahara]

Dear Expert,

I have a WPS for SMAW+SAW process Material SA 516 GR.60/70 with PWHT requirements of 631°C temperature and 450 minutes holding time. 

Now, I have a new project with PWHT requirements of 600±25°C temperature and 3 hours holding time.

Can I use the existing WPS for this new project? What is the acceptable deviation (±) for PWHT requirements?

Looking forward to your guidance.

Best regards,
Pankaj Choudhary 

[Vishwas Keskar]

You can use

Pl note you can not go down less than 595 Deg C 

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAJF_nWO3GK%2BxVdpQ95N2x5bfsi48-jsgmdCuKLhR_d-Cb4Uynw%40mail.gmail.com.

[pankaj pachahara]

What about holding time can we make new WPS and reduce holding time to as per the requirement 3 hour from 7.5 hours

To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CADder3OJJVKYNyhMp%3DVQBpYr9j78rr1CLMgR%2BN9azORuFhNuyg%40mail.gmail.com.

[venkat chikkala]

Dear,

What is the design code and what about impact requirements of Job.

Regards,

CH V RAMANA 

BVIL

--

[sridhar cn]

The PWHT is an essential parameter. The existing WPS can be used if the PWHT temperature range is within ±25°C 

of the prior 631°C. Still, a holding time deviation, from 450 minutes to 180 minutes, generally requires requalification 

or validation. Holding time is much stricter and should be based on material thickness and code passivity.

C Sridhar.

To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAJF_nWNbg0mamaNVJWs7qQ7w5thZ48vupaeFmTZsJiqzek1KzA%40mail.gmail.com.

[pankaj pachahara]

According to ASME section VIII Div 1, yes we have impact requirement at -20°C. 

To view this discussion visit https://groups.google.com/d/msgid/materials-welding/701146338.727314.1757332152427%40mail.yahoo.com.

[sridhar cn]

Mr. Pankaj,

When you are expecting a solution for your problem, Please furnish all the info. at a time and not one after another.

Now u r mentioning about the impact requirement. What is the governing thickness of the welded part and whether 

it is normalised or as rolled /quenched and tempered/fine grained steel. 

CS 

To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAJF_nWNBed20VEw1ZKKAo5GV3HGqXkdyv%3DxLNH5RN6oc_e8Hbg%40mail.gmail.com.

[venkat chikkala]

Dear

Requalification is required,  refer QW 407.2 (supplementary Essential Veritable) of Sec ix 

Regards,

CH V RAMANA 

BVIL

To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAJF_nWNBed20VEw1ZKKAo5GV3HGqXkdyv%3DxLNH5RN6oc_e8Hbg%40mail.gmail.com.