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  1. littlefish2003

    PWHT a API650 modified tank

    hi, we are building a caustic 50% storage tank. client asked us to do a PWHT on the whole tank. how do we analyze when tank is heated to 1150 deg F, the plate property change? tank floor is 3/8" THK, shell is 1/4" THK, roof is 3/8" THK, we will be using G40.21 38WT plate. thanks in advance
  2. littlefish2003

    ASTM A573 VS ASTM A572

    Nicely put. thanks :)
  3. littlefish2003

    ASTM A573 VS ASTM A572

    that's a nice link. thanks for all the help here. this topic has been come up millions of times. try to understand it more myself. totally agree with jdonville's comment. will send this over to engineer and ask for approval. thanks again.
  4. littlefish2003

    ASTM A573 VS ASTM A572

    thanks for your reply. could you please explain a bit more?
  5. littlefish2003

    ASTM A573 VS ASTM A572

    hi we have a job need G40.21 38WT material for a storage tank. our supplier suggested to us using G40.21 50WT material. Is this ok? tank design MDMT is -45 deg C. what is the difference between these two material? on MTR it specified ASTM A572-18 GR 50. Thanks,

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