PWHT on tube to tubesheet welds
PWHT on tube to tubesheet welds
(OP)
I have a Waste Heat Boiler with water/steam 250°C shell side and gas 3490C tube side.
Tubes are A.106 Gr.B, tubesheet is P355NH EN10028.3 (like A.516.70)
Tubesheet are integral 26mm thick with bend radius.
tubes are 4" and are welded to tubesheet with a groove tipe 'J', full penetration.
The distance between center of tube holes is 156mm.
My question is:
When is mandatory the PWHT on welds on tube to tubesheets joints?
thanks - Bytejuice2
Tubes are A.106 Gr.B, tubesheet is P355NH EN10028.3 (like A.516.70)
Tubesheet are integral 26mm thick with bend radius.
tubes are 4" and are welded to tubesheet with a groove tipe 'J', full penetration.
The distance between center of tube holes is 156mm.
My question is:
When is mandatory the PWHT on welds on tube to tubesheets joints?
thanks - Bytejuice2





RE: PWHT on tube to tubesheet welds
I am most familiar with Section I. If you review part PW-39, this is the section providing direction for PWHT. Table PW-39 provides the PWHT requirements for P-No 1 base material. Based on the clarifications and notes in this table, you will find that for tube-to-tubesheet welds of thickness less than 3/8", PWHT is not required provided a 200 deg F is used for tubesheet thicknesses greater than 3/4".
RE: PWHT on tube to tubesheet welds
RE: PWHT on tube to tubesheet welds
RE: PWHT on tube to tubesheet welds
RE: PWHT on tube to tubesheet welds