welding procudure.
welding procudure.
(OP)
Hie Team.
Am in dilemma on which WPS to use for API 5L grade B pipe schedule 20. Am proposing to use
1.GTAW/SMAW
GTAW with ER70S 2.4MM for root run and SMAW E7018 3.2MM for hot pass and capping.
2. SMAW.
To use E-6010 all through.
Between the two which one will qualify and have good penetration since all the joints will be subjected to 100% RT and bearing in mind the TS is 414Nmm.
kindly advice.
Am in dilemma on which WPS to use for API 5L grade B pipe schedule 20. Am proposing to use
1.GTAW/SMAW
GTAW with ER70S 2.4MM for root run and SMAW E7018 3.2MM for hot pass and capping.
2. SMAW.
To use E-6010 all through.
Between the two which one will qualify and have good penetration since all the joints will be subjected to 100% RT and bearing in mind the TS is 414Nmm.
kindly advice.





RE: welding procudure.
You can expect much less problems in root, since GTAW root provides smooth concave face vs. SMAW root having convex shape that you shall carefully grind in order to avoid slag inclusions and lake of fusion in hot pass.
Additionally, Low hydrogen consumable is preferable to avoid hydrogen cracking (you have to bake the electrodes), especially in case your system is for LNG LPG or other hydrocarbons.
RE: welding procudure.
RE: welding procudure.
RE: welding procudure.
Please refer to manufacturer's instructions.