Hard hat
Mechanical
- Jan 29, 2021
- 1
Hello,
Background Info:
Dealing with an ASME vessel that is MDMT -274 F. Material is A240 - 316 SS
Welding WPS/PQR is qualified with impact testing at -320F. Welding is per ASME IX.
Welding consumables meet the requirements of UHA-51(f)(1), (2), and (3) but i'm not sure if they meet UHA-51(f)(4).
Situation:
Welding consumables were not purchased as 'pre-use testing' so they do not include impact tests at low temp on the manufacturer MTR. Vessel manufacturer is deciding to impact test the welding consumables themselves per UHA-51(a) to qualify them for 'pre-use' welding. Vessel manufacturer is doing this buy welding test coupons with the consumables in question, and sending coupons to lab for impact and lateral expansion testing. The test results meet UHA-51(a)requirements.
Question:
Does satisfactory impact testing and lateral expansion testing per UHA-51(a) on the coupons qualify the vessel manufacturer to use these welding consumables lot (even though they are not 'pre-use' tested from the manufacturer) for an ASME vessel at this -320F MDMT ? Or can vessel manufacturer only use 'pre-use' testing consumables ? Also, the coupons were welded using SAW and SMAW process together (per the impact tested WPS/PQR). Does UHA-51(f)(c) prohibit combining of welding processes (SMAW, SAW) during consumable coupon impact testing?
Very much appreciate anybody's insight into this section of the code, it is relatively new to me.
Background Info:
Dealing with an ASME vessel that is MDMT -274 F. Material is A240 - 316 SS
Welding WPS/PQR is qualified with impact testing at -320F. Welding is per ASME IX.
Welding consumables meet the requirements of UHA-51(f)(1), (2), and (3) but i'm not sure if they meet UHA-51(f)(4).
Situation:
Welding consumables were not purchased as 'pre-use testing' so they do not include impact tests at low temp on the manufacturer MTR. Vessel manufacturer is deciding to impact test the welding consumables themselves per UHA-51(a) to qualify them for 'pre-use' welding. Vessel manufacturer is doing this buy welding test coupons with the consumables in question, and sending coupons to lab for impact and lateral expansion testing. The test results meet UHA-51(a)requirements.
Question:
Does satisfactory impact testing and lateral expansion testing per UHA-51(a) on the coupons qualify the vessel manufacturer to use these welding consumables lot (even though they are not 'pre-use' tested from the manufacturer) for an ASME vessel at this -320F MDMT ? Or can vessel manufacturer only use 'pre-use' testing consumables ? Also, the coupons were welded using SAW and SMAW process together (per the impact tested WPS/PQR). Does UHA-51(f)(c) prohibit combining of welding processes (SMAW, SAW) during consumable coupon impact testing?
Very much appreciate anybody's insight into this section of the code, it is relatively new to me.
