Pre Heat Temp on a PQR Per AWS D1.1

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  • February 5, 2018 at 9:34 am #1523
    Flash
    Spectator

    BD
    if the job does not require impact testing – preheat is not an essential variable
    if it does require impacts then you can increase the preheat by up to 56C without requal

    R
    Flash

    February 5, 2018 at 1:37 pm #1524
    bulldog2002
    Spectator

    I have qualified several PQRs, all with CVN, RT, Tensile Pulls, Side Bends, MT, VT, Macro Etch and Hardness.  All of the PQR's have not been with Pre Heat.  A new customer requires preheat on production parts (exact same material thickness, grooves, base material, etc, as qualified on existing PQR's).  Do I need to requalify procedures using the preheat specified by the new customer or can I just use existing PQRs?

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