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  1. #1
    Join Date
    Oct 2004
    Location
    Rhode Island
    Posts
    315

    Default 1" black pipe max psi

    Kind of an odd question, but does anyone know or have a good guess what psi can be put thru 1" black steel gas pipe?
    RJ Perry
    Liberty Construction LLC
    Warwick RI

  2. #2
    Join Date
    Jun 2004
    Location
    South San Francisco, CA
    Posts
    206

    Default Re: 1" black pipe max psi

    I have a "little black book" of various reference charts and specifications, and it states that standard schedule 40 steel pipe 1/8" to 1", continuous weld or seamless is good up to 700psi.

    steve

  3. #3
    Join Date
    Jun 2005
    Location
    Dutchess County, New York
    Posts
    983

    Default Re: 1" black pipe max psi

    What do you plan on using it for?
    PRAY FOR OBAMA.....Psalm 109:8
    http://www.cstonecarpentry.com/

  4. #4
    Join Date
    Jan 2005
    Posts
    2,196

    Default Re: 1" black pipe max psi

    Just make sure you don't buy the crap coming out of China.

    Talking about China, The last cast iron tub (5-1/2' American Standard) we installed was made in China.

    They need to change their name to "China Standard"

  5. #5
    Join Date
    Feb 2006
    Location
    Hathaway Pines, California
    Posts
    149

    Default Re: 1" black pipe max psi

    When I was just out of High school I worked for a utility company and we ran miles of 3/4" black pipe. I was always told the top pressure was 175 PSI, but the working pressure was much lower. This seemed more like a "working rule" rather than anything scientific. For high pressure we always used heavy wall pipe and fittings. In my own shop I use 3/4" pipe for all my perimeter air lines and run it at 135 psi with no problems. Good luck and be careful.

    Don

  6. #6
    Join Date
    Jun 2004
    Location
    Martinez, California
    Posts
    14,830

    Default Re: 1" black pipe max psi

    I was surprised to hear, from a local gas utility man once, that gas pressure within the pipe was only 4 psi. this isn't really on point, but it bears that out by referring to pipe capacities with pressures over 5 psi. So I wouldn't assume that existing gas piping could handle high pressure air for example.
    “It is not an endlessly expanding list of rights —the “right” to an education; the “right” to health care; the “right” to food and housing. That is not freedom. That is dependency. Those are not rights. Those are the rations of slavery – hay and a barn for human cattle.” - Alexis de Tocqueville

  7. #7
    Join Date
    Jun 2004
    Location
    Friday Harbor, San Juan Island, Washington
    Posts
    13,029

    Default Re: 1" black pipe max psi

    This seems like an extremely good question for a pipe manufacturer.

  8. #8
    Join Date
    Oct 2004
    Location
    Rhode Island
    Posts
    315

    Default Re: 1" black pipe max psi

    I was watching american chopper the other night, and they made a potato gun out of copper. As I was strolling thru HD I figured Id make one out of steel threaded pipe.
    RJ Perry
    Liberty Construction LLC
    Warwick RI

  9. #9
    Join Date
    Dec 2005
    Location
    Portland, ME
    Posts
    970

    Default Re: 1" black pipe max psi

    PVC will work fine for that.
    Geoff

  10. #10
    Join Date
    Sep 2006
    Location
    Western Mass
    Posts
    1,666

    Default Re: 1" black pipe max psi

    i always use pvc

  11. #11
    Join Date
    Oct 2004
    Location
    Rhode Island
    Posts
    315

    Default Re: 1" black pipe max psi

    I saw ones made out of pvc before online, and that setup used hairspray and an ignitor or something similiar. They one they made and I made has a chamber to store the air between two valves. Open the first on to fill with air, close that when the gauge shows whatever pressure I want, the the second valve to release the air.

    Here are a couple pics
    http://picasaweb.google.com/podge58977/PotatoGun
    RJ Perry
    Liberty Construction LLC
    Warwick RI

  12. #12
    Join Date
    Jun 2004
    Location
    Los Angeles, CA
    Posts
    4,264

    Default Re: 1" black pipe max psi

    We used to use two tennis ball cans, a sparker from a lantern and shoot tennis balls.

  13. #13
    Join Date
    Oct 2004
    Location
    SF Bay Area
    Posts
    1,338

    Default Re: 1" black pipe max psi

    PVC 4" combustion chamber with a BBQ igniter 2" barrel ;0

    Kye

  14. #14
    Join Date
    Jan 2008
    Location
    Cincinnati
    Posts
    425

    Default Re: 1" black pipe max psi

    Mine is 4" & 2" sched 80 tubing, sched 40 fittings, grill ignitor to long reach fine tip NGK spark plug.
    I built it about 12 years ago, & couldn't count the number of shots!
    I would recomend a healthy tight wrap of duct tape around the tube bottom, as added insurance. It can't hurt, & may prevent a blow out!
    Joe

  15. #15

    Default Re: 1" black pipe max psi

    The pressure of the black pipe you are looking at is normaly rated at 700 psi
    What limits the rating is the pressure rating of the fittings used with it
    150# WOG, Water, Oil, Gas Black or galv.- 125# steam sch40 A53cw pipe

    250# WOG -175# steam sch40 A53cw pipe

    2000# wog -600# steam w/ sch80 pipe a53cw pipe or smls pipe a106

    3000# wog- 800# steam ditto

    6000# wog - 1200# steam ditto


    hope this helps

    garth merrick

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