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View Full Version : Poly Pipe Failures in a Critical Application


Wet_Boots
09-26-2011, 11:53 AM
Used for gas service since the 1970's, poly pipe is not showing a perfect record. (http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2011/09/26/MNAH1L8QMB.DTL&ao=all)

http://img716.imageshack.us/img716/4586/baplastics0926sfcg13168.jpg

jvanvliet
09-26-2011, 01:17 PM
Good grief, that looks like a CL class pvc pipe, for GAS? WTF... Not here, not even in FL are they that frigging stupid, older gas lines run in steel pipes, new ones in some sort of composit and must be yellow.

koster_irrigation
09-26-2011, 05:49 PM
newer gas mains around here are fusion welded with plastic pipe 2" to 4" or so for mains. houses usually have 3/4" poly (yellow) with tracer wire. older homes have 3/4" steel pipe.

Mike Leary
09-26-2011, 06:18 PM
If they'd bury that damn stuff deep enough, I'd have no problem with it, though, how many gas (poly) installers water-backfill?

greenmonster304
09-26-2011, 06:30 PM
If they'd bury that damn stuff deep enough, I'd have no problem with it, though, how many gas (poly) installers water-backfill?

None if they use a plow.
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mitchgo
09-26-2011, 06:41 PM
code these days is to backfill with sand

greenmonster304
09-26-2011, 06:44 PM
code these days is to backfill with sand

Even in soft rock free soil?
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Wet_Boots
09-26-2011, 06:44 PM
If the soil isn't all-sand, I'd hope they trench for the line.

jvanvliet
09-26-2011, 06:47 PM
We pull it;

Mike Leary
09-26-2011, 08:33 PM
We pull it;

Who's who in the last pic?

mitchgo
09-27-2011, 03:52 AM
Even in soft rock free soil?
Posted via Mobile Device

yeah pretty much..

I'm sure they don't do it everytime

mitchgo
09-27-2011, 03:54 AM
Speaking of gas leaks

http://www.msnbc.msn.com/id/44669974/ns/local_news-seattle_wa/t/injured-house-explosion-fire-north-seattle/#.ToGAztRN83k

There searching a 5 mile radius for anymore leaks . I don't know what kind of pipe it was but I believe a downed tree from yesterday's/today's wind/rain storm caused the leak.. At least that's what they said on the tv news.. they don't say it on this link

jvanvliet
09-27-2011, 05:40 AM
Who's who in the last pic?

Site supervisor & machine operator.