Thickness range qualified

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  • January 24, 2018 at 8:16 am #1708
    dieselofdog
    Spectator

    Part 1
    Clause 4.1.2 (K)

    What is your interpretation?  I am conducting a PQR Butt weld on a material that 160mm thick. 

    1. Is my WPS qualified for >36mm to unlimited? or
    2. or from tested thickness to unlimited?  160mm to unlimited?

    What are your thoughts???? 

    January 25, 2018 at 10:57 am #1707
    Elite
    Spectator

    My interpretation would be 0.5t to unlimited

    Where it only says “no upper limit applies”

    But on a second look it is very unclear and I would have to go with option 2 ( 160mm to unlimited )

    January 26, 2018 at 7:41 pm #1709
    dieselofdog
    Spectator

    (k) Thickness limitations for butt welds shall comply with the following:
              (i) For material with a thickness of less than 36 mm, Item (o) of Table 4.11(A)
              applies.
            (ii) For material with a thickness of not less than 36 mm, no upper limit applies.

    (I) is not applicable as it not less than 36 mm, so go to (ii).  There is some grey area here around interpretation. 

    January 27, 2018 at 5:01 am #1741
    cassgazz
    Spectator

    Probably a bit late now, but by doing the PQR on 36mm plate, you will be covered for welding of 36mm plate 160+mm plate.

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