Also refer to Table 330.1.1, preheat vs thickness is also determined by C %. so if your over 1" thick with a C% less than .3 and plan to PWHT then your min preheat can be as low as 50F. If you are over 1" thick and are looking to exempt from PWHT you must have a 200F regardless of C% and a WPS...
QW 200.4 B allows for use of a root pass of say GTAW on .5" PQR to be combined with other PQRs with a higher thickness. Example would be you can combine a .5" GTAW all the way out PQR with a 1.5" SMAW all the way out I can create a WPS that is 5/8" to 8" utilizing GTAW for root pass in...
I would like to get the groups opinion on low temperature service requirements of b31.3. For the sake of this discussion I would like to leave out stress ratio exemptions so we can clearly discuss if impacts are required assuming at the min temps. listed in table A1.
Scenario 1
MDMT -20F, BM...
SFA 5.28 for example says the following regarding ER90S-B91 "B7.18 ER90S-B91 [ER62S-B91] and E90C-B91 [E62C-B91] (9Cr-1Mo, Nb, and V modified). The B91 type filler
metal is a direct replacement to the B9 electrodes in previous editions. The B91 type filler metal is a 9% Cr-1% Mo type
modified...
ASME Section IX
I Have a WPS that is qualified up to 8" but the hardness limit is slightly above client requirement. Would a retest on a 1/2" coupon for hardness testing allow me to maintain my upper limit of 8" when if I combine the PQRs in accordance with QW200.4?
Scenario that may clear it up.
MDMT= -40F
Pipe- A333 6 = impact exempt per table A-1 to -50F
Consumable - 7018-1 pre use impact tested in accordance with SFA 5.1
Impacts are not required for piping or WPS.
Does the system calculate the heat input instantaneously? My interpretation of section IX "Non Mandatory Appendix H," is that you can utilize the data from the original PQR as long as you can confirm that your heat input is in compliance using method (c) for production welding. As far as the...
If the power source has the capability to produce instantaneous heat input readings, that allow for welding/inspection personnel to verify heat input is with in the original max allowed I do not see an issue. Section IX Non Mandatory Appendix H H-200 "When the welding equipment does not display...
2021 ed. is very clear thank you for that. I was looking at the 2023 edition. (Not in affect yet) but the verbiage is not nearly as clear. if you have it available could you check UG-84 and see if you come up with the same conclusion.
Thanks again.
When performing Impact testing in multiprocess PQRs in accordance with B31.3 or Section VIII does the root pass process require impact testing when deposited thickness excluding reinforcement is less than 2.5mm? Both codes have impact exemptions for material less than 2.5mm but would the root...
