Hello All - Working to API 1104 20th. edition, does welding X52 to Gr. B material require a qualified procedure for X 52 only, or do we need qualified procedures for X52 and Gr. B? We would them weld following the X52 procedure. Please advist. Thanks
Gator - you have the right idea. It is explained in detail in Bend Tooling Encyclopedia, which you can access online. I don't think it can be simplified down to a fixed ratio, but the math is shown there I believe -
The neutral axis of the bend, as opposed to the centerline axis of the bend. It is the line separating the region of compression from the region of elongation during the bending process, and lies just inboard of the centerline axis.
Gentlemen - Virtually all client specifications call for the long seams in pipeline to be in the top quarters of the pipe, offset (not aligned) at girth welds. Bends have the seam at the neutral axis. What is the reason for not having the seams in the bottom quarters of the line?
The 6" GR.B, standard, (.280 wt.) Class 300 weld neck flange will hoop stress @ 100% SMYS at 2950 psi. The MAOP of the system that this flange is in should not exceed 740 psi., as this is the maximum working pressure for Class 300 flanges. The fact that you have a GR.B flange welded onto X52...
ASME Sec.9 states that the organization that has operational control over welding (manufacturer/contractor), is responsible for qualifying the WPS to be used in production welding. Is it permissible allow a contractor to use a clients' WPS/PQR to perform field welding for that client on an ASME...
