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  1. maxdistortion

    Guidelines for Expansion Loops

    Did you try searching for your answer in the code? ASME 31.3 Part 5, 319 Piping Flexibility. If have questions feel free, but you have to do a bit of reading and there is no easy answer here.
  2. maxdistortion

    Guidelines for Expansion Loops

    We ran some pipe a while back and didn't provide any expansion provisions, here is what I learned (after hacking it all apart). Pipe will expand 15mm for every 100m of straight run, every 100 degrees C delta. Loops need to be wide enough to be flexible, something like 1/2 meter in...
  3. maxdistortion

    Ice Rake Loads on Roof

    I've been looking around throughout the day to see if I can find what you are asking in a code or standard. A colleague designed some structures for ice protection and ice rakes at one of the large oil sands plants, he was using the Alberta Building Code commentary but I cannot find anything in...
  4. maxdistortion

    Where do you call out TOS elevation?

    Both, it makes it easier for the contractor (me) but we've had the discrepancy you talk about happen to us. I've seen some designers insert a weasel clause in the TOS of section views saying "For reference only" or they have made the TOS drawing "Issued for Construction" and everything else...
  5. maxdistortion

    Piling Record - how to review

    The things I would look for are: - Design VS. Asbuilt locations. If within tolerance for location and plumbness, otherwise the foundations engineer needs to look at it. - Pile at specified depth, or reached refusal. You can see this in the pile counts. The pile inspector would have done this...
  6. maxdistortion

    PMI on Already hot dip galvanized stud and nut

    I think you can do it but you have to scratch the galv coating off. Why do you need to PMI bolts? Are they structual bolts or pipe studs?
  7. maxdistortion

    DBSE (Distance Between Shaft Ends)

    If your hubs are flush now I wouldn't loose sleep over a 60 thou overhang. This is a vendor question. Ask the vendor if they would like the pump back for so they can properly align it as they should have done correctly in the first place. If you bought one of those final sale lube oil packages...
  8. maxdistortion

    Dear Experts, Hai, I would like

    Creeraam, you could use welding gauge (or a straight edge and some feeler gauges to see if the high-low is adequate. I wouldn't be too concern with it being water service. If it was me, I would have my welding foreman have a look at it, and if he doesn't like it I would have it x-rayed.
  9. maxdistortion

    Short Spool at Spec Break

    It doesn't make sense that only the spool experienced extreme corrosion, I would think its process related less than material. I think you may be trapping fluids.
  10. maxdistortion

    Dear Experts, Hai, I would like

    What is the pipe schedule?
  11. maxdistortion

    Guidance on interruption of a continuous pour?

    Looked around a bit but there's not much in term of chart. Portland Cement Association says if the concrete was still plastic then there is no cold joint. If you calculate that you may have a cold joint, try to make yourself, or an inspector available when they strip so you can see if there is a...
  12. maxdistortion

    Guidance on interruption of a continuous pour?

    What was the temperature? and were there any admixtures in the concrete? How much had they poured and how much did they have left? I can only speak from experience as I haven't dug too much into ACI (CSA for me). I would first get a feel for how cured I estimate the concrete was at the time they...
  13. maxdistortion

    DBSE (Distance Between Shaft Ends)

    svkd, sometimes we slide the hubs down the shaft just a bit, a guy could make up the difference if there were enough room on the shaft, and move the pump hub a bit and the motor hub a bit. The way we do this is fab up a rigid plate you can bolt on the hub, and make a spacer of the desired...
  14. maxdistortion

    DBSE (Distance Between Shaft Ends)

    Is the coupling 3mm long or 3mm short? and what coupling gap do you need to achieve? is it a horizontal pump or a vertical pump? and is it a rigid coupling or a flexible coupling. It would help to know the manufacturer of the pump.
  15. maxdistortion

    temporary Strainer gap post flush

    We do both too, if it won't make it difficult to get pump alignment again we suck the pipe together, otherwise it gets a spacer.
  16. maxdistortion

    Welding galv. ASTM A53 gr. B handrail?

    If they didn't spec what welding to use, I wouldn't worry too much about it, as it's not pressure pipe or a structural component. I would try to get away with a bevel weld and no root. What is hand rail designed to? point load and maybe an allowance for impact? I would use mig or tig either...
  17. maxdistortion

    Shims under baseplate for lube oil centrifugal pump

    It seems to me that they shimmed to get level but as LittleInch mentioned, it does not quite sound right that they got the same result from shimming a corner of the base to shimming the motor feet. At 15mm I'm sure they didn't need a machinist level to tell them that. My concern would be that...
  18. maxdistortion

    Unbraced Length of Hanging Beam

    I'm a structural eng but work as a mechanical (all my experience is mechanical). Although I can't help, I'll share a story. In my city, a contractor set a bridge girder which bowed elastically as they picked it. Once they set it, it would seem that the girder became constrained at the ends, and...
  19. maxdistortion

    Using a flat plate instead of an end cap on a pipe

    @borobam182 I think there's not much money to be made by making your own components, I am of the opinion that reinventing the wheel is not very efficient. And if you guys create a new type of fitting, what is to say that a client will accept it, you may have spent lots of money registering and...
  20. maxdistortion

    Using a flat plate instead of an end cap on a pipe

    As per 31.3 sec. 302.2.3 Unlisted Components, if components are not listed in Table 326.1 of 31.3, which is where B16.5 fittings are listed and rated, a designer has the option of using or "creating" a component, as long as he/she is satisfied with the mechanical properties and integrity. This...

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