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  1. MTPipeliner

    my next life

    Are there any sort of "inspection" type opportunities within your general location where your experience would be valuable? I know several individuals who have quit their "career" and gone onto inspecting for other companies doing similar work. They seem to be pretty stress free positions, and...
  2. MTPipeliner

    Winter gears

    My only comment is a "when in Rome" type thing. Take a look at what the construction guys are wearing, this will give you an idea for what works for your particular job site. They are working in the conditions all the time so they've usually found something that works. On a recent project it...
  3. MTPipeliner

    San Bruno 30" Natural Gas Transmission Line, -FAIL-

    Just because a pipeline is X years old doesn't mean that it is in good or bad condition. There are lines that are 80+ years old that are still in service with no problem, and there are also lines that haven't lasted 10-20 years before failing completely. I'm not sure that mandatory replacement...
  4. MTPipeliner

    San Bruno 30" Natural Gas Transmission Line, -FAIL-

    30" depth of cover is the minimum for newly installed lines, but you aren't required to maintain 30" cover. It could be reduced because of farming, grading, etc. I would say that anywhere from 30" - 60" of cover is pretty normal, with a handful of lines being deeper. I would imagine that...
  5. MTPipeliner

    filling material for underground strucutre

    Is it possible to remove the tank lid? Either whole or break it into pieces. If you had the lid off, then you can just fill it with gravel, sand, etc. If you have to leave the lid on then using a flowable fill of some kind seems like a good idea. You're probably talking some pretty serious...
  6. MTPipeliner

    Small leakes in the begging of a test...then it just stops. Why?

    I don't know that it will buy you much ground with the inspector, but irrigation lines do this all the time. When you lay them out and turn the valve on they leak all over the place, but as the pressure builds up they quit leaking.
  7. MTPipeliner

    looking for non permeable "geotextile"

    You make take a look at a "pit liner" material that is used to line pits on an oil drilling rig location.
  8. MTPipeliner

    BUILDING ON THE ROMANS ?

    The nucular part of the story was definately the most unbelievable. They made some interesting points, but I find it hard to believe that someone could misplace technology as cool as a flying carpet.
  9. MTPipeliner

    BUILDING ON THE ROMANS ?

    Has anyone else watched the recent episodes about aliens visiting earth thousands of years ago on the History Channel? The one I watched discussed the pyramids and some of the other major stone ruins as well as the possibility of gliders or other flying machines. They also talked about the...
  10. MTPipeliner

    Interesting Pipeline Blowdown

    I'd also guess that there is a restriction in the line somewhere that kept the flow rate relatively low. Having the gas/water mixture gave you the best, or worst, of both a gas or water system. You've got the compressible gas that keeps the pressure high, and a liquid that keeps the flow...
  11. MTPipeliner

    Keeping up with Paperwork

    Haven't beat them, but try to annoy them once in a while. I always get a little bit of perverse satisfaction from using one of the industrial staplers to attach reciepts to expense account statements, knowing that eventually the accountant has to pull it back out, which can't be done without a...
  12. MTPipeliner

    BP disaster and liquid nitrogen

    On the way back from lunch today, the guy on the radio said that the tar balls in Florida are from the ships, not BP's spill. Don't know if that's a reliable report, but thats what he said.
  13. MTPipeliner

    Domestic Water Plumbing in Cold Regions (northeast)

    Can't help you with the code issue, but I think you may have a potential to freeze the line. A friend of mine had a similar issue last winter and after getting it thawed out he left a tap on all winter. This past summer he dug it all up, put a heat tape on it and also burried some insulation...
  14. MTPipeliner

    Aluminum Pipe

    Irrigation -- pivots, wheel lines, and hand lines
  15. MTPipeliner

    Repair Welding on Water-filled Pipe

    The water in the pipe will tend to pull heat away from the weld, so penetration is definitely affected. The quick cooling rate will also lead to hydrogen induced cracking. Because of these two issues you need to have a higher heat input than when welding empty pipe. If the heat input becomes...
  16. MTPipeliner

    Perforated Metal Warping

    This is way outside my area of expertise so maybe this won't even work, but is it possible to punch half the holes, then flip it over to punch the other half?
  17. MTPipeliner

    buoyancy control for pipelines

    For what it's worth, our company spec is 40% negative bouyancy. No idea where it came from, but that's what it is.
  18. MTPipeliner

    Lubricated plug valve vs. ball valve for natural gas service

    We use valves in a throttling (partially open) service when we purge lines back into service after maintence work. High pressure gas is taken from the in-service side of a block valve and transfered through a bypass with a partially open valve to the section being purged. Now you've got...
  19. MTPipeliner

    Lubricated plug valve vs. ball valve for natural gas service

    Unlike most of the previous posts, my company has lots of lubricated plug valves in service, and we still spec and use them quite frequently. They are used in natural gas pipeline service. Typically in a blow off or side valve situation. A few old ones are still in a mainline block setting...
  20. MTPipeliner

    Weld build up of buttwelded valves

    Physically, yes it's probably possible. I would say that it's not a good idea, and that it likely voids waranties, is out of spec, and is not in compliance with codes.
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