(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 15 of 15

Thread: Coated gas pipe for underground use

  1. #1
    General Contractor Carpenter toolaholic's Avatar
    Join Date
    Jul 2005
    Location
    Marin Co. Ca.
    Posts
    829

    Default Coated gas pipe for underground use

    used the regular black iron ,yellow coating 21' length. also needed some 10s
    so used h .depot green. inspector signed off, but never seen these green ones. the yellow has a heavier jacket. any comments?

    Natural gas piping underground
    Last edited by Terry; 10-13-2012 at 11:28 AM.

  2. #2
    Plumber Winslow's Avatar
    Join Date
    Dec 2005
    Location
    Hawaii
    Posts
    450

    Default

    the green is rated and is just as good. It is actually easier to use as you don't have to strip the coating to thread. make sure you wrap the pipe anywhere the coating gets compromised. Once you damage the coating on the x-tru (yellow wrapped) it will rust through rather quickly (depending on soil conditions).

  3. #3
    General Contractor Carpenter toolaholic's Avatar
    Join Date
    Jul 2005
    Location
    Marin Co. Ca.
    Posts
    829

    Default

    thank's ,does it have a upc stamp?

  4. #4
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,673

    Default comment

    My comment is that the green Scotchcoat is just about useless in the long run, unless the entire length is either tape wrapped or enclosed in a plastic sleeve. It will rust through rather quickly anywhere the "paint" is damaged, and it can be damaged somewhat easily. I have seen sections that were only a few years old that looked like swiss cheese they had so many holes in it.

  5. #5
    In the Trades Bob NH's Avatar
    Join Date
    Oct 2005
    Location
    New Hampshire
    Posts
    3,307

    Default

    http://ops.dot.gov/regs/small_ng/Chapter6_3.htm

    ASTM D2513 polyethylene pipe may be used for underground gas pipe. That is what most systems use these days.

  6. #6
    General Contractor Carpenter toolaholic's Avatar
    Join Date
    Jul 2005
    Location
    Marin Co. Ca.
    Posts
    829

    Default H J , I have some time before backfill

    I,ll go over it and prime and tape the whole pipe. won't use again!
    question is your soil part of the problem? do you have to set anoig bags?
    we don't

  7. #7
    I&C Engineer (mostly WWTP) Lakee911's Avatar
    Join Date
    Aug 2005
    Location
    Columbus, OH
    Posts
    1,328

    Default

    What kind of tape do you wrap it with?

    Thx

  8. #8
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,673

    Default Pe

    I do not know of any polyethylene gas pipe that would be safe and available for anyone other than a cerified installer to install.

  9. #9
    General Contractor Carpenter toolaholic's Avatar
    Join Date
    Jul 2005
    Location
    Marin Co. Ca.
    Posts
    829

    Default type of tape

    use 20 mill plumbers tape. but 1st use approved primer, let dry then tape

  10. #10
    Plumber Winslow's Avatar
    Join Date
    Dec 2005
    Location
    Hawaii
    Posts
    450

    Default

    the coating on the x-tru can be damaged just as easily. Have had problems with it rusting through rather quicky after getting hit with a shovel. It doesn't matter what pipe you use, it the coating gets damaged and not repaired it will rust through rather quickly depending on soil conditions. The coating on the "green" pipe isn't painted on. It is an epoxy that is baked on, a huge difference.

  11. #11
    General Contractor Carpenter toolaholic's Avatar
    Join Date
    Jul 2005
    Location
    Marin Co. Ca.
    Posts
    829

    Thumbs up good info winslow thank's

    will check it all before beckfill

  12. #12
    DIY Junior Member exptape's Avatar
    Join Date
    Aug 2012
    Location
    China
    Posts
    1

    Default

    good idea. if you need polyethylene coating tape, please contact me.Angelina Meng 0086-13863735038. my email is xundatape@gmail.com. we are the professional and big manufacture for PE pipe wrap tape.

  13. #13
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    The code here requires 40 mil protection, which means 2 wraps of the 20 mil tape, over primer. The primer is very expensive, as is the tape, so the whole thing adds $5 per foot to the cost!!!!!!

  14. #14
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,673

    Default

    quote; The coating on the "green" pipe isn't painted on. It is an epoxy that is baked on, a huge difference.

    I used the term paint loosely since the material is applied TO the pipe and regardless of how it is applied it still chips off and exposes the pipe material. This might not be a serious problem if the underlying pipe were galvanized, but since it is black pipe it deteriorates very quickly in an underground situation.
    Licensed residential and commercial plumber

  15. #15
    General Engineering Contractor ballvalve's Avatar
    Join Date
    Dec 2009
    Location
    northfork, california
    Posts
    3,261

    Default

    All the propane companies will run the poly on a tank set quite cheaply.

    Always hated the black coated gas line because the crappy wrap tape for joints is so stiff that it cannot seal properly. It should be 2 mil with 10 wraps. Then I would coat it with a good asphalt sealer or silicone [if you can get asphalt anymore- all the CA stuff is crap water base]. That entire system is a primitive joke.

    If anyone really cared or wanted to think and MFG. it, one would slip on a section of shrink tube over joints and turns and heat it up.
    Last edited by ballvalve; 08-04-2012 at 12:48 PM.

Similar Threads

  1. Underground Natural Gas Pipe run
    By wujohn in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 15
    Last Post: 02-08-2012, 05:05 PM
  2. Use Clay pipe or cast iron pipe for overhead sewer (50-60ft underground in yard)??
    By bnbhoha in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 6
    Last Post: 04-01-2011, 06:17 AM
  3. Trouble with Underground Pipe to the Lake
    By cottagefun in forum Pumps and Tanks Well Forum & Blog
    Replies: 6
    Last Post: 08-11-2009, 05:37 AM
  4. Underground pipe install.
    By Mikebarone in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 22
    Last Post: 10-01-2008, 07:22 AM
  5. underground frozen pipe
    By tgaf1949 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 4
    Last Post: 01-29-2008, 11:35 AM

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
  •