Field-Fabricated Spheres, Materials of Construction (MOC), SA-516-60
Field-Fabricated Spheres, Materials of Construction (MOC), SA-516-60
(OP)
Hi there,
Reference is made from Pressure Vessel Design Manual, 4th Ed. by Dennis R. Moss & Michael Basic, page 594, Procedure 9-7: Field-Fabricated Spheres. It's about Materials of Construction (MOC), it mentioned that "SA-516-60 may be
used to eliminate the need for PWHT in wet H2S service". Does anyone know the reasons for this?
Typically most of the client (operators) requires PWHT for pressure vessel under severe service (Wet H2S, Sour).
Although, the reference design manual is a guideline only, and it's not part of the contract with client, I just wanted to know.
Thanks in advance for your help.
DorbsDee.
Reference is made from Pressure Vessel Design Manual, 4th Ed. by Dennis R. Moss & Michael Basic, page 594, Procedure 9-7: Field-Fabricated Spheres. It's about Materials of Construction (MOC), it mentioned that "SA-516-60 may be
used to eliminate the need for PWHT in wet H2S service". Does anyone know the reasons for this?
Typically most of the client (operators) requires PWHT for pressure vessel under severe service (Wet H2S, Sour).
Although, the reference design manual is a guideline only, and it's not part of the contract with client, I just wanted to know.
Thanks in advance for your help.
DorbsDee.





RE: Field-Fabricated Spheres, Materials of Construction (MOC), SA-516-60
The area of concern however would be the welding. You would have to ensure in some way that the production welding is also producing material with suitable properties for sour service.
RE: Field-Fabricated Spheres, Materials of Construction (MOC), SA-516-60
RE: Field-Fabricated Spheres, Materials of Construction (MOC), SA-516-60
-Christine