Plant Room Chilled Water WPQR??
Plant Room Chilled Water WPQR??
(OP)
We`re doing a plant/pump room (chilled water) with 10" carbon down to 3/4" carbon. Will a generic ASME IX WPQR do for this?? and correct me if I`m wrong a 6" 6G test will cover me up to 10"?? and 3 No: 3/4" will be needed to qualify me for the 3/4". Will I also need a 2" test to be done to bridge between these 2? All these are 6G of course. The client is suggesting radiography as NDT throughout. As these procedures will cover me for socket welds (some of the smaller stuff are socket welds) and that a lot of the time the radiography on socket welds is to determine whether that the expansion gap was left between the end of pipe and socket rather than quality of weld, keeping this in mind wouldn`t Penetrant testing do as an NDT on these sockets (same welders will be welding the butt welds as the sockets) Any help is much appreciated.





RE: Plant Room Chilled Water WPQR??
(1) 3/4" diameter to qualify to size (3/4") and to an unlimited maximum diameter (see QW-252.3).
(2) the 6G will cover all positions
(3)a groove weld qualification will qualify for fillet welds (QW-452.6).
Regarding NDT, the RT would be to confirm a proper gap after welding. Wet fluorescent MT would be my choice for surface NDT of the system welds.
RE: Plant Room Chilled Water WPQR??
Sorry the above should be QW-452.3, this was a typo.
RE: Plant Room Chilled Water WPQR??
RE: Plant Room Chilled Water WPQR??
What does 3 3/4" diameter do for you other than you have a welder qualified for 2 7/8" minimum to unlimted maximum. You need to review ASME Section IX, Article III. The table QW-452.3 above applies to welder performance qualification groove weld diameter limits.
RE: Plant Room Chilled Water WPQR??
RE: Plant Room Chilled Water WPQR??
Do you understand WPS and welder performance qualification requirements for Section IX? Review ASME Section IX, and if you don't have a copy BUY IT.
RE: Plant Room Chilled Water WPQR??
Regards
Brad Stone
RE: Plant Room Chilled Water WPQR??
RE: Plant Room Chilled Water WPQR??
RE: Plant Room Chilled Water WPQR??