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Hi experts, I’m calculating assembly torque values for 300#, A105 RTJ flange joint with A193-B7 bolting. I’m referring GP42-32 a British petroleum for calculations and values of variables. Calculation results show O-7 check fails thanks to equation O-6, for size 3,4,6 & 8. I’m not sure how to...

Hello, I have numerous SS304 150# piping class with MDMT of -48.4 deg C. I’m planning to use SS304 stub ends per ASME B16.9 with LF2 CL.1 backing flange. Can I use this combination given lowest minimum permitted temperature for LF2 CL.1 is -45.6degC as per ASME B 31.3?

Hello experts, Should I consider the formula provided in ASME B 31.3(304.2.1) for calculating wall thickness of ASME B 16.9 elbows which are manufactured say on mandrel? I did a WT check for for a particular case using 304.2.2 where I found that intrados thickness of LR(1.5D) ASME B 16.9 elbow...

@weldstan. Thanks for your reply. I am wondering why ASME B31.3 does not apply “For temperatures above 538°C (1,000°F), these stress values may be used only if the material has been heat treated at a temperature of 1 093°C (2,000°F) minimum" for <3/8”? Should I consider this requirement for WT...

Hello members, 1. I'm calculating WT to purchase A312-TP321H seamless pipes for design conditions 800°C at 3.5kg/cm2. For thk >3/8", ASME B31.3 mentions note 30 against it in Table A-1 which states "For temperatures above 538°C (1,000°F), these stress values may be used only if the material has...

Hello members, 1. I'm calculating WT to purchase A312-TP321H seamless pipes for design conditions 800°C at 3.5kg/cm2. For thk >3/8", ASME B31.3 mentions note 30 against it in Table A-1 which states "For temperatures above 538°C (1,000°F), these stress values may be used only if the material has...

Hello members, 1. I'm calculating WT to purchase A312-TP321H seamless pipes for design conditions 800°C at 3.5kg/cm2. For thk >3/8", ASME B31.3 mentions note 30 against it in Table A-1 which states "For temperatures above 538°C (1,000°F), these stress values may be used only if the material has...

Thanks David for the reply. my doubt still persists. Let me make it simpler. Pipe ASTM A358-321 which I intend to use is a austenitic SS welded pipe using filler material., in which case I must refer to the row stating "Austenitic stainless grade 3xx and N088xx nickel alloys [Notes (7) and...

Ej=1 since the longitudinal seam is X-rayed.I’m referring to table 302.3.5 in ASME B 31.3. Design temp is 800degC. For material A358-321H, am I correct in understanding that value of W must be linearly interpolated from values in the row "Austenitic stainless grade 3xx and N088xx nickel alloys...

Hello members, Can you kindly help me out with below query? 1. I have to calculate the WT for A358-321 CL.1 pipe at design conditions of 800degC at 49.7psig. Am I correct in understanding that value of W must be linearly interpolated from values in the row "Austenitic stainless grade 3xx and...

Hello members, Can you kindly help me out with below query? 1. I have to calculate the WT for A358-321 CL.1 pipe at design conditions of 800degC at 49.7psig. Am I correct in understanding that value of W must be linearly interpolated from values in the row "Austenitic stainless grade 3xx and...

@littleinch: thank you for your reply. You have been helpful @MJCronin: I don't claim to have special knowledge about welding of weldolet, but, I do have the common sense to know that welding a weldolet is not as straight forward as circumferential weld or longitudinal weld given the awkward...

Thanks little inch for you reply.like you said one of my concerns was deformation of run pipe due to heat input resulting from welding the weldolet(I guess that’s what you are referring to as bending?). I’m pleasantly surprised that weldolet is the cheapest. I was wondering forging such a...

Based on the latest calculations by process engineer, we wouldn't be needing a 72" line anymore. The max size of the line is 60". the weldolet is 60"x24" with below details: run pipe size/ WT: 60"/ 17.48 mm run pipe size rating: CL300. fluid: process, moderately corrosive-3mm CA The options...

Thanks to both of you for your prompt reply. I will come back with further details on Monday.

Hi experts, I am looking for some advise on on weldolets. The client line class specifies a weldolet for 72”x24” run-branch connection. Frankly speaking I have never such a big run size pipe nor such a size combination of weldolet. I’m wondering whether if it is a good idea to use a weldolet...