Re: [MW:12087] PWHT on ASME U Stamped Pressure Vessel with SS316 internals

Hi, Is it a cladding lining? or internal parts attached to inside of the equipment?   If it is like a cladding internal,pls.refer section UCL of Section VIII,div.1.,it clearly specified that the heat treatment shall be done together with the SS or any cladding.   if it is a internal parts to be welded inside,you can weld a pad plate with the same vessel material and go for the PWHT. After PWHT finished you can weld the ss316 parts with the pad plate as welded.   Finally, If your customer accepts to proceed the PWHT with SS316 internal,you can go ahead.Normally customer/Project specification over rules all as they are the end user.I think your QC worried about the SS316 chemical properties after PWHT(corrosion resistant). this can be avoid by doing pickling and passivation after PWHT. Thanks & Regards, (Karthik) Karthikeyan.S QA/QC Manager Getabec Energy Co.,Ltd. 379,Moo6,Soi8,Nikhomphatana, Rayong-21180, Thailand. Phone: 0066 38 897035-8 (Off) Fax: 0066 38 897034 Hand Phone: 0066 892512282 --- On Wed, 8/3/11, Vijay <k.vijayaraj@gmail.com> wrote: From: Vijay <k.vijayaraj@gmail.com> Subject: [MW:12085] PWHT on ASME U Stamped Pressure Vessel with SS316 internals To: "Materials & Welding" <materials-welding@googlegroups.com> Date: Wednesday, August 3, 2011, 6:29 PM Dear Experts, We are in big trouble. We need your inputs for our problem which we are facing now. We are fabrication a pressure vessel with ASME U stamp. In that vessel some internal of SS316 materials are to be welded. The size is 24". My question: Can we do PWHT of Loading Temp @425 Deg. C and Soaking Temp @610-630 Deg.C of 51 mins Soaking time. Is there any code requirements for PWHT for SS internals??? We got approval from Client design team PWHT with internals and we proceeded the welding also based on their confirmation. Now, our QC is not accepted this method. We are in deep trouble. Kindly clarify. Thanks in advance. Regards, Vijay -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.