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Thank you Maslov and WE91. My interpretation of Para. 323.2.2(h) is that "base materials, inc. a welded tee for example" can go down to -48°C for stress ratios reduction, and "welds" can go down to -29°C for stress ratio reduction. Furthermore Box A - 3 ( b ) requires that under -18°C the...

thread292-509093 closed, so I continue in this one. When the MDMT is below -29°C lets say -40°C, and the welding consumable is classified by the applicable SFA below -29°C lets say E7018-1 -45°C. for the base metal lets assume a stress ratio of 0.5 allows to reduce the MDMT of a curve B to...

Dear coallegues, There are no changes in these paragraphs in B31.3 ed. 2020 and 2022. Stress ratio is about 0.5 so curve B materiales, after Fig. 323.2.2B, fall below the design minimum temperature(DMT=-40°C). But is the reducton limit -48°C or -29°C? 323.2.2 (h) states: For carbon, low...

Dear Colleagues, We are defining the welding of a B31.3 piping system intendeg for LPG, the MDMT required is defined as -40°C. Base materials are Curve B or 29°C per Table A-1. The minimum temperature without impact for base metals is further reduced to -48°C by Para. 323.2.2(h) as Stress...

Thank you both for the reply, I appreciate your recommendations of testing and qualification in excess of code minimum requirements. I also think impact test of a PWHT weld test plate is the ultimate verification for this case. weldstan: Base metal es A516 gr 70 in the normalized condition, so...

Dear Colleagues, We are purchasing a ASME VIII div 1 vessel. MDMT required is -40°C. PWHT required by service. Base metal es ASME 516gr70n curve D. Base metal es exempted of impact testing. By UCS 67(a)(3) impact testing of the PQR is not required as long as: “each heat and/or lot of filler...