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[MW:24741] API 1104 - WELDING PROGRESSION

By Materials & Welding
Hello everyone,

I need to clarify the requirements of essential variables as described in API 1104.

We had conduction PQR's for API5L X70 material Butt Weld (5G position) in 36 inches x 22.23mm Wall Thickness as described below:

WPS 001

ROOT PASS: SMAW - E6010 - WELDING PROGRESSION - VERTICAL UPHILL
HOT    PASS: SMAW - E8010-P1 - WELDING PROGRESSION - VERTICAL UPHILL
FILL & CAP  : FCAW - E81T8-G - WELDING PROGRESSION - VERTICAL DOWNHILL


WPS 002

ROOT PASS: SMAW - E6010 - WELDING PROGRESSION - VERTICAL UPHILL
HOT    PASS: SMAW - E8010-P1 - WELDING PROGRESSION - VERTICAL DOWNHILL
FILL & CAP  : SMAW - E8010-P1 - WELDING PROGRESSION - VERTICAL DOWNHILL


With reference to the above parameters, we had conducted PQR's for both WPS on the same material and size. And the Mechanical test results had not proved any significant differences. I need to know why should I not write a WPS with the reference of the above 2 PQR's with HOT PASS welding progression as Vertical Uphill / Downhill.

With Regards,
R.Chandrasekhar
QC Engineer

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