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2.5" black iron

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  • 2.5" black iron

    I am putting a proposal together for a 2.5" black iron NG 5psi pipe. I've not done a gas line this large and in talking with the inspector he said that the preferred joining method is welding but threading (my plan) is fine as long as pressure test passes. This makes me question my plan...

    Should, in your opinion, this pipe be welded? If so - why? What is the problem with threading this pipe vs welding?

    Thanks

  • #2
    Re: 2.5" black iron

    welding would require a plumber/ fitter that's a certified welder.

    screw pipe would require a 141 or similar machine to thread the pipe.

    anything over 4'' ips, we welded. wrenching 2.5'' is not that difficult, especially with a compound leverage wrench

    personally, screw pipe would be less expensive as you don't need the certified welder$$.

    rick.
    phoebe it is

    Comment


    • #3
      Re: 2.5" black iron

      That is what I was thinking. I would have to pass on the job if it had to be welded, but I don't see why it would be. Thanks for the vindication. Time to get that threader warmed up.

      I talked to the inspector because the CBC says that over 4" ips has to be welded but it is up to the AHJ for less than 4.

      Comment


      • #4
        Re: 2.5" black iron

        Any certified (qualified) welder can do the job for you, in MA the plumber "supervises" the subcontracted trade.

        Comment


        • #5
          Re: 2.5" black iron

          we thread up to and including 4" here, unless an engineer specifies otherwise.
          No, it's not rocket science, it's plumbing and unlike rocket science it requires a license.

          Comment


          • #6
            Re: 2.5" black iron

            Originally posted by TozziWelding View Post
            Any certified (qualified) welder can do the job for you, in MA the plumber "supervises" the subcontracted trade.
            I'll do the roots with 6010 , You can do the covers with 7018.
            red eye leaves Boston 1;00 am bring Your 6 G papers. Tool
            I can build anything You want , if you draw a picture of it , on the back of a big enough check .

            Comment


            • #7
              Re: 2.5" black iron

              I did a 2" B. I. MED. gas pipe in L.A. About

              15 years ago had no problem passing test All threaded pipe and fittings

              I tested at 30psi, before i called for the

              inspector

              PS IN L.A. YOU HAVE TO PUT THOSE STICKY PIPE LABELS EVERY SO MANY FEET SAY MEDIUM PRESSURE GAS
              Last edited by JERRYMAC; 04-18-2011, 09:37 PM.
              JERRYMAC
              E-MAILJERRYMAC777@GMAIL.COM
              CALIF. LIC. PLBG,HEAT,DRAINS,ELECTRIC,WATER HEATER, BOILER, POOL AND SPA HEATER
              FIRE SPRINKLER CONTRACTOR,
              SINCE JAN. 1989

              Comment


              • #8
                Re: 2.5" black iron

                Ah just run a dozen 1" gastite lines over to a manifold and be done with it

                Comment


                • #9
                  Re: 2.5" black iron

                  Originally posted by toolaholic View Post
                  I'll do the roots with 6010 , You can do the covers with 7018.
                  red eye leaves Boston 1;00 am bring Your 6 G papers. Tool
                  Ok here is your rig

                  Comment


                  • #10
                    Re: 2.5" black iron

                    we weld every thing 2 1/2 and over it is much faster then threading it
                    Charlie

                    My seek the peek fundraiser page
                    http://observatory.mountwashington.o...nal&fr_id=1040


                    http://www.mountwashington.org/weather/conditions.php

                    new work pictures 12/09
                    http://public.fotki.com/hvachawk/

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                    • #11
                      Re: 2.5" black iron

                      Originally posted by HVAC HAWK View Post
                      we weld every thing 2 1/2 and over it is much faster then threading it
                      then you've never seen me cut, ream and thread by hand

                      rick.
                      phoebe it is

                      Comment


                      • #12
                        Re: 2.5" black iron

                        Originally posted by TozziWelding View Post
                        Ok here is your rig
                        Nice set up . welds soo smooth , sounds soo smooth.
                        Was on the cape 2 weeks ago. Love those fried clams. too cold for
                        me anymore. statey clocked Me doing 80 in the underground in Boston. Let Me go, No ticket! Another Irishman, Bless Him !
                        I can build anything You want , if you draw a picture of it , on the back of a big enough check .

                        Comment

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