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Yes this are required for high pressure transmission lines, can we weld API 5L Gr. B pipes with WPHY 42 fittings?

As client suggested to take for flanges: A694 F42, Fittings: A860 WPHY 42, So corresponding pipes shall be API 5L Gr. X42, I have approached some manufacturers who can make this, but thickness not yet finalized.

Also do we need to add mill tolerance of 12.5% on it?

So for 48 inch API 5L Gr. X42 pipe with 42.6mm WT will withstand hydro test pressure of 138 bars (1.5 x 92 bars)? is that right?

Thanks for your replies Sirs, Yes I am designing as per ASME B31.3 process piping (formula provided in 304.1.2 and Table A-1) From my previous experiences many suggested me WT is determined only using design parameters like design pressure & temperature & not hydro test pressure. So now i am...

I'd like to determine pipe wall thickness, may I know I should consider design conditions like design pressure, design temperature only or should I take hydro test (1.5 times design pressure) pressure in order to determine the pipe wall thickness? This is to be used in skid fabrication were...

Thank you very much for pointing me in the right direction on this.

We are designing as per ASME B31.3. Could you please figure out which design code you are meant to use? & hydro test pressure?

Thanks for your answer. Actually this is required for our skid manufacturing in high pressure transmission line. Our client have asked to take material as: For Flanges: ASTM A694 F42 - F70, Fittings: A860 WPHY 42 - 70 & Pipes: API 5L LSAW only. So we planned to take pipe material as premium...

I have taken equation for wall thickness using ASME B31.3 - PROCESS PIPING where most people are using to check WT, & not ISO 13623. Wall thickness can be find out using ASME B31.3 (304.1.2 STRAIGHT PIPE UNDER INTERNAL PRESSURE) by following equations; t = PD/2(SE+PY) - (3a) t = PD/2SE -...

The design conditions are correct, this is required for our fabrication in our project. LittleInch pls explain if you can

I have 48" API 5L GR. X52 LSAW PIPE, Design temperature is 75 deg C, design pressure is 138 bars & corrosion allowance is 3mm. When calculated wall thickness using formula t= PD/(2SE+PY)I got result as Wall thickness = 70mm? Is that true? we can't find pipe with such thickness. What will be the...