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  1. jeffhogie

    hydrostatic tests below zero degrees celcius

    I am trying to determine what B31.3 permits me to do regarding performing hydrostatic tests, when the ambiant temperature is less than 0 degrees celcius. I read thread292-227826 however it references B31.1, my application is for process piping. I would also like to know where in B31.3 it...
  2. jeffhogie

    cleaning carbon steel with hydrogen peroxide

    I am trying to determine if it is safe/acceptable to clean carbon steel pipe with a hydrogen-peroxide and water solution. Does anybody know the answer to this question? If a source where this is stated can also be included it would be much appreciated. Thanks in advance, - Jeff
  3. jeffhogie

    edge length of weldolets

    I am trying to determine the length of the welding surface for weldolets (the shape is essentially a circular sinusoidal wave). The weldolet dimensions are dependent on the header and branch pipe sizes. Background: The purpose of this is to determine how much welding material is required per...
  4. jeffhogie

    B31.3 - 304.1 Wall thickness calculation inquiries

    Firstly, let me say that I am a fairly new engineer, and I am simply not confident with the following information. I have a few different questions 1- the variable 'P' (internal design gage pressure); is this the 'upset pressure' or the 'cold-flange-rated pressure'? 2- When determining the...
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