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  1. lslcpfcc

    indentation on RT film???

    DekDee this is no central dark strip indication, so root concavity is not possible. i dont understand for you secondary section about GTAW vertical up and SMAW cellulose vertical down.
  2. lslcpfcc

    indentation on RT film???

    we cann't see the inside surface of the pipeline, undercut is impossible because of the undercut indication cannot appears so straight and even.
  3. lslcpfcc

    indentation on RT film???

  4. lslcpfcc

    indentation on RT film???

    why i can’t up date the film photos
  5. lslcpfcc

    indentation on RT film???

    Dear this is a problems on the RT films of piping welds， which one can give me a reasonable explanation. on the films one indication （a dark line on the root weld edge ares ）looks like lack fusion ，but as my and my friend many year experience， this is not the lack fusion. the welding process...
  6. lslcpfcc

    How many passes are required

    Dear Syahar1975 I worked as the welding engineer more than 10 years，and experience in storage tanks. that is a bed concept and habit for the welder to execute welding working as per his experience aside the WPS . other reasons why the welder don't welding as per the WPS because the WPS is not...
  7. lslcpfcc

    regarding the calibration duration

    Dear the project which will using the detector is postpone because of all actual factor. I know it very clearly, the calibration interval cannot be recommended or determined by the calibration agency, the user of the detector shall keep the equipment in a good condition and in a valid...
  8. lslcpfcc

    API 1104 vs ASME IX , from one PQR can I develope 2 WPS for 2 different welding codes?

    dekdee are you from china, the same to me. I dont agree with your point "A PQR is just a test coupon" ,A PQR cannot be simply considered a test coupon, a test coupon only the tool or approach to complete the all PQR, PQR is a complex process not only a test coupon. The AI's point is correct.
  9. lslcpfcc

    API 1104 vs ASME IX , from one PQR can I develope 2 WPS for 2 different welding codes?

    agree with gtaw the purpose of the PRQ is different because of the difference construction code. The PQR and WPS must be prepared with the corresponding construction code respectively，Cannot be used mixed.
  10. lslcpfcc

    RT Film Interpretation

    No standard address the provision that the welder name shall be indicated in the RT film.
  11. lslcpfcc

    regarding the calibration duration

    dear, I calibrated a detector on 10th Feb 2014, with a enclosed tag that addressed the due time is 10th Feb 2015, But after calibration the detector was not used anymore, only stored in the initial box and kept an calibration status. from 6th May 2016, we start to used this detector in...
  12. lslcpfcc

    Endorse WPS

    AS prescribed in ASME ix, the WPS shall depicts all of the essential，non-essential variables，if required，includes the supplementary essential variables for each welding process THE VARIABLES OF EACH PROCESS ARE LISTED IN QW250 conclusively， the brand of the electrode is not listed in each...
  13. lslcpfcc

    process pipe qualification range

    Dear bro you must understand the difference between procedure qualification and welder qualification. i don't find the paragraph 432.1 in ASME ix except the table 432.1 which indicates the F-No. of electrode. Maybe you means QW423.1 if a welder qualified use an WSP combined with a base...
  14. lslcpfcc

    Roundness and plumbness

    congratulations to you Bro， the TPI inspector is experienced in the field. his points is right，how can you control the final tolerance of plumbness from the top to the bottom of the tank shell，even no check requirement during erection by the API650，but as an constructor，you must control the...
  15. lslcpfcc

    How to execute the mechanical test of multi process PRQ

    We can read this lecture http://www.gowelding.com/wp/asme-multi.htm assure that the test coupon thickness of multi-process welding is 26mm or thicker, how can we cutting the impact test specimen,from SMAW deposited metal? or from GTAW deposited metal? or a single set specimen contains two...
  16. lslcpfcc

    Why MDMT must be correspond to the coincident pressure MAWP ?

    as the statement of ASME VIII-1 UG20(b） “The minimum metal temperature used in design shall be the lowest expected in service expect xxx”， The MDMT marked on the nameplate shall correspond to a coincident pressure equal to the MAWP” Background: a pressure vessel,the internal pressure is direct...
  17. lslcpfcc

    ASME Section IX A No. for Electrode E310-15 Welding to AISI 310 to AISI 310

    Dear As per ASME II-C clause "The nominal composition (wt %) of this weld metal (E310) is 26.5 Cr, 21 Ni,and you test result, A-9 is appropriate.
  18. lslcpfcc

    How to understand the symbol ellipsis " ..." in chemical composition table of ASTM

    Dear weldstan As your point, that analysis result for that element is not required to be reported on the MTR. If the result of the element is very high or very low, how can the purchaser judge the acceptance of the Material. Can you send the web-link of that thread.Dear metengr ?
  19. lslcpfcc

    How to execute the mechanical test of multi process PRQ

    The ASME VIII-1 code is the construction code. a full size can represents the boss process，this point don't conform with the principle of ASME code, I considered.
  20. lslcpfcc

    How to execute the mechanical test of multi process PRQ

    Background: A PQR test coupon with 10mm thick, welded by multi-process GTAW +SMAW ,the deposit metal thickness is 3mm and 7mm respectively. QUESTION: (1)for cold band test, TWO FACE and TWO back bend specimen will be tested to represent GTAW and SMAW deposit metal. (2)for impact...

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