welding L-80 casing to 4130
welding L-80 casing to 4130
(OP)
We need to develop a welding procedure for welding L-80 Type 1 casing to cone shaped for lack of a better term "end caps" of 4130 material. the pipe and cones are 13.375" x 0.375". my greatest concern is the PWHT that would be required after welding. design temperature is -50F to +250F. design code is ASME B31.4. hydro test pressure will be 5500psi, operating pressure will be 2600psi. there will also be L-80 to L-80 welds on the piece will they also require PWHT? if anyone good give me some tips on this i would be greatly appreciative or if i more information is needed please let me know. thank you





RE: welding L-80 casing to 4130
The L-80, Type 1 casing appears to be a heat treated, carbon steel (0.43%C by mass) material. The carbon content is such that welding should require PWHT to ensure adequate ductility in the heat affected zone of the L-80 casing material. This means PWHT temperature, if required, needs to be below the original tempering temperature by 50 deg F to avoid altering the bulk casing mechanical properties.
The 4130 can be welded with no PWHT given the thickness and lower carbon content. So, the limiting factor will be the L-80 casing.
RE: welding L-80 casing to 4130
RE: welding L-80 casing to 4130
RE: welding L-80 casing to 4130
RE: welding L-80 casing to 4130