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  • Users: owlscreech
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  1. owlscreech

    Torquing 300 Series Stainless Steel Bolts

    The standard torque equation is T=KFD where T = torque, K is the "nut factor," determined experimentally, F is the force (LBS, N) and D = the nominal bolt diameter. Does anyone have any data/experience with the value of K for 300 series bolt material, e.g., A193-B8? As received values (dry)...
  2. owlscreech

    B16.5 Flange Surface Finish

    I have a 1977 version of B16.5. In paragraph 6.3.4.1 it states the following about flange facing finish: "Either a serrated-concentric or serrated-sprial finsh having from 24 to 40 grooves per inch shall be used. the cutting tool employed shall have an approximate 0.06 in. or larger...
  3. owlscreech

    Bolt Torque Values for Spiral Wound Gasketed Joints

    I have read recently that spiral wound gaskets designed in accordance with ANSI B16.20 are suppose to compress to 0.125-0.135 with a uniform bolt stress of 30,000 psi. This means that torque tables should only depend on the bolt size. Yet many tables are set up by pressure class/fitting size...

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