Results 1 to 12 of 12

Thread: Galv and Cast

  1. #1
    Join Date
    Mar 2007
    Location
    Connecticut
    Posts
    1,822

    Default Galv and Cast

    Anyone have a problem with Galvanized and black iron joined togeather for natural gas line? Galvanized corners and black iron straight sections

    Similar Threads:
    Last edited by wayne soper; 04-19-2008 at 12:05 PM. Reason: no picture
    OREP Home Inspector E&O Insurance 2

  2. #2
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,286

    Default Re: Galv and Cast

    Quote Originally Posted by wayne soper View Post
    Anyone have a problem with Galvanized and cast iron for natural gas line?
    I see galvanized regularly. Cast iron? Never. How would you seal it? Do you mean black iron pipe?

    Department of Redundancy Department
    http://www.FullCircleInspect.com/

  3. #3
    Join Date
    Mar 2007
    Location
    Connecticut
    Posts
    1,822

    Default Re: Galv and Cast

    Yes Black Iron, Sorry,


  4. #4
    Join Date
    Feb 2008
    Location
    Chicago IL
    Posts
    1,940

    Default Re: Galv and Cast

    Black pipe is for gas. Galvanized for water. It is common to see some galvanized fittings or pipe used in gas runs. Contractor runs short etc. However, galvanized is not approved for use with natural gas, nor is it considered good workmanship.
    suggest write it up.

    www.aic-chicago.com
    773/844-4AIC
    "The Code is not a ceiling to reach but a floor to work up from"

  5. #5
    Join Date
    Mar 2007
    Location
    New Mexico
    Posts
    1,222

    Default Re: Galv and Cast

    I'm not certified for plumbing codes, but I asked my friend who is a plumber this question several years ago, and he said it made no difference. Galvanized costs more, so you don't see it very often for indoor use.

    Are you sure about your statement that it is not approved for use with natural gas?

    Jim Robinson
    New Mexico, USA

  6. #6
    Join Date
    May 2007
    Location
    Portland OR
    Posts
    43

    Default Re: Galv and Cast

    According to Code Check galvanized is okay, the IRC reference listed is 2414.4.2. I've read on a different forum that the newer galvanized pipe is electrostatically coated rather that dipped, so the coating doesn't flake off and clog the lines. Galvanized is probably a better choice for outdoors, especially anywhere near salt spray. I sometimes see a galv. coupler used indoors, like Marcus said, maybe the plumber ran short.


  7. #7
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    25,313

    Default Re: Galv and Cast

    Galvanized is okay for gas, besides, if the galvanized does flake off, there is a sediment trap ... isn't there?

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  8. #8
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Galv and Cast

    Galvanized piping on a gas system is a repair item on my report due to possible flaking of the inside coating of the pipe. I don't offer a code refernce...only some stuck gas valve references. Another plumber can say I am wrong....in writing.


  9. #9
    Join Date
    Feb 2008
    Location
    Chicago IL
    Posts
    1,940

    Default Re: Galv and Cast

    Muni insp routinely flag it and require change out up here. I'll check our code to see if/what it says. I just know for now it has always been a no-no.

    www.aic-chicago.com
    773/844-4AIC
    "The Code is not a ceiling to reach but a floor to work up from"

  10. #10
    Join Date
    Jan 2008
    Location
    Louisville Ohio
    Posts
    85

    Default Re: Galv and Cast

    In my past life as an engineer ,we did some fact finding black pipe and galv pipe are the same size. Diffence is galv While threading galv pipe the die does wears out faster


  11. #11
    Join Date
    Mar 2007
    Location
    Cape Cod, Massachusetts
    Posts
    559

    Default Re: Galv and Cast

    2006 NFPA 54, National Gas Code allows the use of the following materials for gas piping systems.

    1. ANSI/ASME B36. - Steel & wrought-iron
    2. ASTM A53 - Steel Black Iron & Hot-Dipped Zinc Coated seamless and welded.
    3. ASTM A106 - Seamless carbon steel for high temperature service.
    4. Copper and brass pipe - (can't use if gas contains more than .3 grains of hydrogen sulfide per 100scf of gas)
    5. ASTM B 241 - Aluminum alloy (must be marked for gas use) and has specific installation requirements.
    6. ANSI LC 1/CSA 6.26 - Corrugated Stainless steel.
    7. ASTM D 2513 - Thermo-plastic - (for outdoor and underground use only)

    If you write it up as a problem, you are incorrect. You should not tell your clients something that is not true.

    --- Only the "Facts Jack" ---


  12. #12
    Join Date
    Mar 2007
    Location
    Connecticut
    Posts
    1,822

    Default Re: Galv and Cast

    Did not write it up as a problem, Thanks for all the replies. Wayne


Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •