If in preparing of test coupon for PQR I have the min. preheat temp. as starting temp. of welding, about 80 C and during the progress of the welding the temperature of the coupon raised for example to 250 C. May I specify the Min. Preheat Temp. in WPS as 30 C because of the para. QW406.1 of ASME...
If in preparing of test coupon for PQR I have the min. preheat temp. as starting temp. of welding, about 80 C and during the progress of the welding the temperature of the coupon raised for example to 250 C. May I specify the Min. Preheat Temp. in WPS as 30 C because of the para. QW406.1 of ASME...
One of major point of inspection of the weld specially in one side welding that may effects on the quality of an existing WPS is root pass.
More over there is only One para. in ASME Sec. IX (QW-200.4) that discused about root pass requirement and it seems that changing of root pass is not...
There are some question regarding to ASME new allowable stress.
1- How does know the reason or philosophy of changing - or better say - increasing of the allowable stress since 1999.
2- Is it based on improving of steel making , vessel fabrication or maintenance systems.
3- If we have some...
1- How does know the reason or philosophy of changing - or better say - increasing of the allowable stress since 1999.
2- Is it based on improving of steel making , vessel fabrication or maintenance systems.
3- If we have some modification or repairing ( new nozzle connection ) in old vessel...
Is there any body to know the mechanical and chemical composition of material ASTM A212-Gr.B that has been replaced with A515? And which garde of A515 is equal to A212-Gr.B?
