CSST gas sizing

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  • This topic has 3 replies, 3 voices, and was last updated 21 years ago by Avatar photoSelgas.
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    • #278274
      Avatar photoMasterPlumbers
      Keymaster

        CSST is now starting to make a market in California. When I size a gas system form UPC 2000 i USE TABLE 12-3. Now with CSST in have to use the pipe designers guide. One has 8 tables for natural gas. Mt question is on the table the have .05 psi gas pressure and a pressure drop of .5 wc, 1.0wc, 1.5wc, 2.0 wc 3.0wc and so on. How do you figure out and put into play these numbers of pressure drop? I know that it is pressure drop from loss due to friction but how is that figurer out? Any help would valued.

      • #298171
        Avatar photoSelgas
        Participant

          Obviously you are not a licenced Gasfitter if so you would already know the answer to those questions. Why do you wish to establish the calculations in the manner you have specified.
          Every Country has a different system of allowable pressure drops on various fuel gases, these drops are the maximum one is allowed with the varying inlet supply pressures feeding your pipework.
          They have a dramatic effect on the required pipe sizing needed to complete the installation to ensure that there is suficient gas volume and pressure available at every appliance connected to the pipework.



          Selgas Services Ltd
          Craftsman Gasfitters, Plumbers, Electrical Service Technicians

        • #298172
          Avatar photoPhil_H
          Participant

            Peter,
            Obviously you do not know the licencing requirement in California; otherwise, you would not be so hard on this guy. It does not take much to get a licence in CA. And you do not neccessarily need any kind of licence to pipe a house in California. Any Joe Blow working for a general contractor may pipe a house with a couple stipulations. I did not write the rules so please don’t yell at me about them. Maybe the liberals in CA think this is equal opportunity.

            Mr Hime,
            See 2000 UPC 1217.3: “pressure drop . . . will at no time exceed five-tenth (0.5) inches . . .” I do not know what tables you are looking at but they sound like longest run of pipe type tables. [img]null[/img]

          • #298173
            Avatar photoSelgas
            Participant

              Phil

              Thank you for your kind words – I rest my case!!!



              Selgas Services Ltd
              Craftsman Gasfitters, Plumbers, Electrical Service Technicians

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