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  • Users: QC7
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  1. QC7

    Changes to the WPS

    Hi, “Changes may be made in the non-essential variables of a WPS to suit production requirements without requalification provided such changes are documented with respect to the essential, nonessential, and, when required, supplementary essential variables for each process. This may be by...
  2. QC7

    structural attachment by welding after the hydro test on pipeline

    Hello gentlemen, Are we permitted to attach some clips or structural attachment by welding after the hydro-static or leak test on the pipeline in accordance with code B 31.4 I cannot find anything in B 31.4 that definitively states that a re-hydrotest must be performed after the addition of...
  3. QC7

    Dissimilar thickness.

    thread292-370252 Can I get ASME SEC IX interpretation number of below subject,which was discussed and closed in previous thread 292-370252. DonRoss (Mechanical) (OP) 1 Dec 14 13:53 Gents, I wanted to follow-up with my response from ASME. It hasn't been given an Interpretation number yet...
  4. QC7

    PWHT

    Hi, I have some query related with Local PWHT of piping spool as per B31.3. 1)Throught out heat tratment cyclce (resticted range) the temperature differential bewteen thermocouples registering peak temperatures shall be within limit of + or - 40degree celsius as per ASME Sec VIII , However...
  5. QC7

    Pipe line welding

    Hi Team, Can you just explain me about technical reasons for below clause during pipeline fit up. 1 When a pipe with one longitudinal seam is used, this seam shall be within the top 120 degree of the circumference. 2 The longitudinal seams of consecutive pipes shall be offset by at least...
  6. QC7

    FBE coating inside the pipe spools

    Hi Team, Could you explain ,Whether internal FBE Coating is necessary to protect from abrasive blasting like copper slag during the time of external painting on piping spools? Piping spools have two open flages at both side, and internal FBE (like TK 210 ) has carried out before the...
  7. QC7

    Flange

    Hi team, Need ur Opinion Observed some discrepancy in material certificate. Requirement is API 6A, 5000 psi rating Flange,PSL2,TEMPERATUE CATAGORY IS ''U''. But below mentioned deviation has observed. -As per API6A 5000 Psi rating, impact test temperature required for U category is minus...
  8. QC7

    IQI Material

    Hi Team, Whether I can use SS material IQI on Inconel radiography?? !! Which material is less radiation absorption material,if comparing between SS and Inconel?? Regards,
  9. QC7

    Ug in Higher Thickness wall Piping.6'' x 35 mm Thk as well as 14'' x 83mm wall

    Hi, I have 6" x 35 mm pipe to elbow as well as 14" x 83 mm Thk weld joints for doing radiography.Radiography has to perform by x-ray as well as Gamma ( available only Ir 192) depending available facility at site.Piping Manufacture code is B31.3 Chapter IX. RT has to do as per ASME Sec V.Now...
  10. QC7

    Hardness

    Why most of codes only gives max hardness limit & not minimum?? Could someone explain briefly about minimum what level hardness can accept on A106 GR B as well as other common materials in pipe lines? Also why most of client is asking hardness value on HAZ,if distance between two welds are...

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