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Dear Mr. DVWE, As per scope of work the new piping is 321H grade P8 material and it will be welded to existing piping in which the material specification is 10CrMo9.10. When I refer to asme section 9. The 10CrMo9.10 is belongs to P5A materials. Since as per 31.3, PWHT required for P5A. Please...

Dear All, In the asme 31.3 table 331.1.3 exemption to mandatory PWHT. Mentioned that For P5A, group no.1- less than or equal to 16mm thickness -groove-Mandatory pre-heat is applied (see attached file for details) is exempted to PWHT. Our project: We have tie-in activity the existing pipe...

Dear All, Kindly suggest what welding consumables can we use for tack welding between A311 cl. A gr. 1045 to A197 b7 material. Thanks in advance.

Thank you Weldstan

Dear All, Greetings, We are preparing a WPS with dissimilar base metal A240 gr. 321H and A516 gr. 70, Instead of using this two material specification. Can we use a312 gr. 321H and A106 gr.C. for PQR. Thank you.

Dear All, Thank you for all your answer/advice on my query, we qualify our procedure base on the project requirements. Regards, Mulz

Dear Mr. Weldstan, Yes client requirements states that PQR shall be made on base metal having the same P-numbers or group number as the base metal use in production welding. So it means that the PQR is not acceptable base on that statement?

Dear All, I'm not expert in welding, Our submitted WPS/PQR got rejected by the client the reason is that the P-Number in WPS is not same with the PQR. WPS is P5A to P1 and the supporting PQR is P5A to P4. From ASME SEC IX 2017: Qw-424.1 ''base metal used for Qualification: One metal from P-No...

Thanks Mr. LittleInch, Mr. mk3223 and Mr. hacksaw. Sorry for the insufficient details for my query and late reply. Anyway, we already resolve the issue, client accepted the material after cross checking with the designer. More power to all of you guys.

Dear All, I am facing problem. Our flange got rejected by the client. Our flange (RTJ, CL1500) will be connected to equipment nozzle which having FN FLANGE RTJ Cl1500, what is the difference between this two. Thanks in advance. mulz

Dear All We are involved in a piping project, our scope is to replaced existing chilled ammonia LTCS pipe with SS 304 pipe. The client required to do PWHT on the new piping. We have existing WPS but no PWHT. If we add the PWHT,is there any changes in the essential and non-essential variables...

Thanks to all of you.

Dear, What is the pre-heating temperature in the latest edition of asme b31.3 coz we are dealing with welding of piping whose diameter is 16'',cs, sch.80.. Thanks mulz

Dear all, I'm involved in a pipeline project, the pipe/fitting materials are carbon steel (A106 gr.b/A234 gr.wpb) 16'' dia.,sch.80.(21.44mm).We have approved WPS,the pre-heat temperature mention in the procedure is 80 deg.C.The client QC advice us that follow the latest edition of ASME SECTION...

Dear Mr. MR., Thanks a lot. In addition on valve testing,can I used this on GLOBE VALVE?

Dears, Is it required for gate valve to do seat test both side? Thanks in advance Romullo

thanks for all of your answer to my question it will give more understanding to me.

Dear all, If a welder qualified in ASME section IX,can he weld API 1104?