API 570 - PI, WELDING

Welding Inspector & WPS (PART 2)

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PART 2 : BASE MATERIAL VARIABLES

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Key Notes:

* WPS – CVN with min.thickness is 16mm (ASME IX & AWS D1.1)

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ASME QW-451.1, AWS D1.1 TAB 4.2/4.6

* AWS D1.1 ONLY:

TAB 4.1 –> (28) Diameter range for pipe welding is > 600 mm (24 inch)

* Example of ASME IX 11&5

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QUESTION: How about the unlisted material like SS400 Flange welded to API 5L pipe

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Fillet WPS to be provided!!!

* Example of AWS D1.1 29&1

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In mean of Structure integrity, the Combination of PQR should not be used like ASME IX flexibility.

SPECIAL NOTE:

ASME IX only! Example of Thickness combination by various PQR to make new WPS (with the same variables of mother PQR, even the CVN).

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See the QW 200.4 – Interpretation for more information, Be careful that the PWHT will be required in case of T>38mm (ASME VIII), or T>19 mm (ASME 31.3) 🙂

 

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