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  1. edelvi

    Dent before Cold Bending Pipe

    It will be so. Thanks metengr.
  2. edelvi

    Dent before Cold Bending Pipe

    Thanks for your interest. I want to be clear saying that the dent no was originaed by the bending process, and it was evidenced in the side of the bent (close to the neutral axis). According to ASME B 31.8, 841.2.3, just at state (a) (1), must immediately the pipe be rejected? , if not, as...
  3. edelvi

    Dent before Cold Bending Pipe

    In a pipe line gas under construction (1440 PSI design pressure), a double joint pipe 42” and WT 0.601” was bent in a cold bending process. Indications were not encountered in the curvature area, but a dent of 3/32" depth in an area no larger than 2” square and close to neutral axis was...
  4. edelvi

    Eccentricity Scraper down or up?

    Of course I will take in count yours observations and suggestions. You have been very kinds.
  5. edelvi

    Eccentricity Scraper down or up?

    As the Pig Receiver (300#) is already installed (eccentricity side down), could it have a technical explanation to leave this so, or on the contrary, to fix the “problem”?
  6. edelvi

    Eccentricity Scraper down or up?

    What is the best o correct technical way to install a Pig Receiver? Can it be installed with the eccentricity part down o must be it installed with the straight part down? Yours comments will be appreciated.
  7. edelvi

    Cadwel

    We need to connect some cathodic protection cables to a pipe line (gas and oil in operation) using Exothermic Weld (Cadweld), and we need to find specifications, rules where say about of the Criteria’s which must be had in account to carry out this activity: maximum operation pressure, minimum...
  8. edelvi

    Marking size and place on Fittings

    I already have had a looking through ASME B16.5, MSS-SP 25..., and I could not find information regarding to right place to mark fittings (more exactly caps), and what the letter size should be. Also, I would like to know if bevel caps must be painting protected. Should I received caps with out...
  9. edelvi

    re-useable bolts?

    I already have read some threads that comment about my question, but I juts want to know the specifications, standards, etc which recommend do not reusable nuts, bolts, etc specially in high pressure places. Could some one cooperate with me? Thanks in advance.
  10. edelvi

    How chromium specimen Test is representative?

    Chromium adherence on the globe surface of one Globe Valve will be evaluated according to ASTM B 571 in a specimen. Company in charge of the chromium coating carry out the process in different cells: one for the globe and one for the specimen because the big difference in size, shape and...
  11. edelvi

    MTR¦s Missing and fittings need to be used

    There are some pipeline fittings without MTR´s: Groove, globe and check valves, tees, elbows,flanges, caps, weldolet, sockoleet, reducers, etc., with different diameters, wall thickness and ratings. Within all the possibilities the Company wants to try of recuperating the majority of them...
  12. edelvi

    Hydrptest

    I am very thankful for the instructive answers.
  13. edelvi

    Hydrptest

    The highest point is the end point. Delta of temperature during the pressurization was 0.03°C (increasing) . As you already know, pressure strongly changed from 70 to 35 (35 bar) and then to 75 (40)Bar. Is there any compatibility whit the only +/- 2.7 pressurized air m3?.
  14. edelvi

    Hydrptest

    Just 0.009% of air content was calculated for this secction....
  15. edelvi

    Hydrptest

    My question is regarding to the following information: Pipeline Section: D= 40”, WT= 20 mm, L=40 km. High point (end point) = 500 masl./ Test point (DW and lowest point) = 50 masl / Fresh Water filtered to 200 mesh , average water temperature 12°C. Filling operation was interrupted several...

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