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  • Users: TCBQCM
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  1. TCBQCM

    Teflon Tape on 8 round threads?

    Is it common practice to use teflon tape on 8 rd (EUE) threads? In regards to 5.5" 8 round threads during a 2000psi Hydro-test...
  2. TCBQCM

    Can 4140 Hot rolled material be welded to SA 350 material?

    I have a project that requires me to have SA 350 flanges that are 2 1/2" thick welded to 4140 Hot rolled mechanical tubing that is 1 3/8" thick. What would be the pre-heat temp? What would be the max interpass temp? Also should we PWHT this? If so at what temp and for how long? Thank you for any...

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