WPS criteria for SA240 (304H) material.

[mohd firdaus abd rahim]

Dear Sir,

I have piping WPS 3" Sch 80 ( 7.62 thk), Stainless steel 316L. My future project is need to install new elbow size 28",32" & 38" for reactor. Material for elbow SA240(304H). Both side of elbow shall be weld short piece pipe. Details for short piece is rolled plate(different thickness- 16mm max thickness) then joint it with welding, then weld to the elbow. Is it possible to use WPS mention above?. Refer to ASME shall 2T max of base metal can be weld. If not, can I just develop new WQT until meet thickness required?. Example is, me produce WQT 6" Sch 160. Is it possible?. Refer to ASME DIAMETER range 2-1/2" to unlimited. Material also still in same grouping. Plate for short piece also SA240(304H).

OR I need to develop new WPS and WQT?. Thank you in advance.

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Best Regard,

Mohd Firdaus Bin Abd Rahim

QA/QC
h/p : +6012-2796361
e-mail : mohdfirdaus...@gmail.com

            seemys...@yahoo.com

[S.Mohammed]

Dear mohd,

You can't use 316L filler for 304H material. You will have to use 308H filler rod.

Hence you have to re write WPS.
Welder qualification is not required.

Regards
Mohd.

[george....@gr.bureauveritas.com]

If you do not change the Fno you do not need to re qualify. In this particular case you risk nothing from a metallurgical point of view.
Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager

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