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  1. Gapinspect

    B31.3 Table 323.3.1 A-4 Impacts

    I see this has been discussed before but with no real answer. The background is: In accordance to B31.3 Table 323.3.1 A-4 requires that a specimen is prepared as "One required for each welding procedure, for each type of filler metal (i.e., AWS E-XXXX classification), and for each flux to be...
  2. Gapinspect

    PWHT of Temporary B31.1 Welded cap

    LittleInch thank you for your personal opinion. And although I do agree with you it is not much help in answering my question. So again, Is there any exemption/code case/interpretation that allows us to perform the weld, perform the hydro, and cut out the weld. All without PWHT?
  3. Gapinspect

    PWHT of Temporary B31.1 Welded cap

    We need to weld a temporary cap (P1) to a (P4) pipe for a shop hydro-test of a spool piece. The only qualified weld procedure we have requires PWHT. Is there any exemption/code case/interpretation that allows us to perform the weld, perform the hydro, and cut out the weld. All without PWHT...
  4. Gapinspect

    ASME IX QW-423.1 QUESTION

    "Is that correct???Can he welds, for example, P47?" Yes, and Yes.
  5. Gapinspect

    Temperature gradients B31.1 & VIII

    We have a B31.1 weld (pipe to nozzle) to a very short nozzle on a section VIII vessel which is going to require alot of heat to go into the shell to meet the PWHT requirements. B31.1 is very vague on PWHT and temperature gradients but section VIII UW-40 is very clear about harmful gradients...
  6. Gapinspect

    Cabin Foundation

    We recently purchased a cabin in central Canada. The foundation (which is identical as all the neighboring cabins) is simply wood blocks on the ground. The soil is primarily sand. I want to raise the cabin to approx 3' from ground level and insulate the foundation walls. Drilling piles to below...
  7. Gapinspect

    Welding on water filled tubes

    Metengr, thank for the reply. I was under the exact same thinking.
  8. Gapinspect

    Welding on water filled tubes

    We have welded a stringer pass (3/32)down hand on a SA210C waterfilled boiler tube with 7018A1. Single stringer about 2.5" in length. The welding was to repair an area of undercut (membrane to tube). Question is what effect on the base material and possible future failure could this cause? Our...
  9. Gapinspect

    CWI Study Guide

    Congrats 67fordgalaxie500. Welcome to the club. About your books. I would keep them. They are great reference and you will be kicking yourself later for selling them when your in a bind.
  10. Gapinspect

    B31.1 Distance between two adjacent buttwelds

    Depending on the size of the pipe,I have seen anywhere from 2 x Diameter for small (under 6") pipe/tube or down to 6" on large diameter pipe. The codes don't specify a minumum distance but good engineering and welding practices do. Most clients (all Canadian) that I work with have a standard of...
  11. Gapinspect

    Measurement of Interpass Temperature

    Usually when dealing with interpass you are trying to limit your maximum interpass temperature, so you would want to measure on the hottest part of the heat affected zone which would be the weld itself. Depending on the configuration of the weld you could use temperature indicator crayons (temp...
  12. Gapinspect

    Flush J-Groove Weld

    gr2vessels is dead on, you get no allowance for the extra weld above the thinner parent material.
  13. Gapinspect

    cracking of 625 overlayed 8620/ 4130 during GTAW welding

    If you are stripping back the overlay it is a good idea to verify that you got it all with a copper sulfate solution. Spray or swab on the weld area and remove any traces of the overlay revealed by the etchant.
  14. Gapinspect

    ASME B.31.1-ASTM Materials

    A large amount of the ASME materials are based on ASTM materials and as such can be used. In Section II of ASME for the appropriate material it will say if the material is equivalent to the ASTM material. Here is the excerpt form SA106 (Identical with ASTM A 106-95 except for editorial...
  15. Gapinspect

    What tools need to be calibrated?

    Calibrate a steel ruler?? I have had ISO auditors lok at me pretty funny for calibrating stuff such as rulers,tape measures.For anything basic, such as a ruler I would put a limitation on it, ie.. calibrated at first use and then only if damaged (no regular interval), or at first use then...
  16. Gapinspect

    CWI Study Guide

    67fordgalaxie500 I don't think you can use a conversion calculator or a programmable calculator. I took two $5 calculators. The conversions were on the back page of the test booklet so all you need to do is spend a little time and do some conversions so you are comfortable. The courses AWS...
  17. Gapinspect

    CWI Study Guide

    NDE Non-destructive Examination or NDT Non-Destructive Testing. Its been a while but there were questions on Radiography (RT), Liquid Penetrant Examination (PT or LPI), and Magnetic Particle Examination (MT or MPI). I am sure that it talks about NDE in one of the books you bought. I found...
  18. Gapinspect

    CWI Study Guide

    Austin, I don't think it is worth buying the study guide to API 1104. 1104 is a pretty simple (and small) code book. The code portion is open book, so you should have no problem as long as you are familiar with the code. If you are not, read it over a few times and flag area's (if you are still...
  19. Gapinspect

    RT before or after PWHT

    Metengr, if delayed cracking was the concern and the part is 3.5" thick. Would you expect to see the indications near the surface where a surface (or slightly subsurface) ndt may pick it up?
  20. Gapinspect

    RT before or after PWHT

    I am refering to a ASME 1 SSH header. P5A material. I realize that the code does not require Radiography after PWHT but it has become a long standing practice to RT before PWHT (economics) and RT after PWHT(metalurgy). I was wondering if any one could give some insight into what the failure...

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