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  1. chti

    API 610 Material

    Hi, Thank you for answer. If I understand ,and to complete your demonstration, for a pressure casing in A216WCB for class API S6, for a low T° application, we have to choose A352LCC instead A352LCB , because chemical and mechanical properties are exactly the same as WCB ! I have another...
  2. chti

    API 610 Material

    Hi, According to API 610, for the choice of material, there is appendix G an H. I understand that appendix G and G1 are only for information and are only for guidance.( informative) For appendix H1 & H2, it is written under appendix H ( Normative). In § 6.12.1.4 it is written that "pumps parts...
  3. chti

    ASTM A182 - HEAT TREATMENT

    Hi, In ASTM A 182 paragraph 5 it is stipulated that after hot working, forging shall be cooled to a Temperature below 538°C prior heat treating according to table 1 . My question is , what is the reason of this temperature, and how this temperature has been fixed?? Thank you for your answers...
  4. chti

    ASTM A 194 2H

    Hi, Than you for your answer, but I read in § 7.2, that the proof loading test is an option and should be indicated in the purchase order , if we want that it shall be performed. Is it correct? It seems that suppliers do not perform the test if it is not added in order ! Thank you
  5. chti

    ASTM A 194 2H

    Hi, Is the proof loading test always required for nuts? Should be stipulated in the order as a requirement?? Thank you for your help
  6. chti

    ANSI B36.19 or B36.10

    Hi, We have to supply piping 3/4 Sch 160 , ASME SA 312 Gr TP304L. ANSI B16.39 , is limited to SCH 80, and ANSI B36.10 indicates SCH 160. How can we correctly supply this pipe ? According to B 36.19 or ANSI B36.10. Thank you for your help. Regards.
  7. chti

    FILLER METAL - POSTWELD HEAT TREATMENT

    Hi, In fact we have the 2 cases, one WPS qualified with PWHT, and an other without. For the first case it is for repair by welding cast parts which are not in final machined condition , and in the second case it is for final cast part machined, and it is to avoid possible deformation due to...
  8. chti

    FILLER METAL - POSTWELD HEAT TREATMENT

    Hi, E (R)410NiMo according to ASME II Part C, require postweld heat treatment on test assembly. If we have to perform a repair by welding without postweld heat treatment,(machined part, and small defect on non pressure part by example) is it required to supply the filler metal without heat...
  9. chti

    SA 538

    Hi, Do you know why in ASME II, SA 538 is permitted for use with ASME III and not permitted for ASME VIII? Thank youu for your help.
  10. chti

    ASME III Class 1

    Hi, Do you know where in section NB, we can find the minimum required distance between 2 welds?Fillet and butt welds. Thank you for your help
  11. chti

    ASME III - Appendix U

    Hi, For an example,We have to manufacture a pump according to ASME III Class 1 , appendix U is required by customer. In appendix U,in paragraph U-1312 for permitted material,it is required material according to Table U-1610-1 of this Appendix and materials listed in Section II,Part D, Table...
  12. chti

    UNS N08926 BOLTS AND NUTS

    Hi, I would like to know, if there is an ASTM specification for bolting in the grade N08926. I have to supply some bolts and nuts , and I don't know how to proceed, and what standard to applied. Thank you for your help.
  13. chti

    Base material for PQR

    Hi, we have to performed a welding procedure qualification with 304L, according to ASME III Division 1 and IX. Is it possible for the PQR to use ASTM or European material for the sample, if its an equivalent to the same P Number according to ASME QW422? Thank you for your help.
  14. chti

    Electrical silicon steel

    Hi, I don't find a standard which defines the chemical analysis for the steel M400-50A according to EN10106 (equivalent to ref ASTM A 677 Grade 47F240). I would like to know the content of carbon , silicon and other elements. Thank you for your help.
  15. chti

    Martensitic steel pickling mistake

    Hi, We have made a mistake in our product cycle during picling. In fact, we have put martensitic steel in fluo notric acid bath instead a phosphoric bath during, 1 hour. The material is an équivalent grade as X4CrNiMo16.5.1 (16%Cr, 4%Ni and near 2% of Mo).Austenizing ( 950 1080 °C) and...
  16. chti

    Tolerances for I and U for WPS

    hello, Thank you for your answers. But my question is about WPS required for welding in shoop floor. In your PQR you define all electrical parameters, and you fix these parameters, for a grade, a thickness, a diameter, number of layers....and you are qualified for these variables.But in shop...
  17. chti

    Tolerances for I and U for WPS

    Hello, Iwould like to know what are tolerances for U and I you write on your WPS, according the PQR? Thank you for your help. Regards.
  18. chti

    API 610

    hello, API 610 10th edition, requires gussets for auxiliary piping. Welding qualification and performance qualification are required, dimensions for gussets are defined, but nothing for the type of welds,design of welds, the rules for crossing, or proximity of welds. Do you think that we have...
  19. chti

    Nickel base alloy hard facing

    Hi, I have the result of a qualification after hard facing with nickel base alloy as grade 5.(similar colmonoy 5) My question is about Fe content :What is the effect if Fe content is superior to the requirement? For my exemple we need Fe content between 2% and 5%, and we have obtained on hard...
  20. chti

    ASTM A193B7

    Hello, A193 GrB7: In the scope it is written that bars and wire shall be hot - wrought.What does it means?Do you think we could use a bar from A193GrB7 instead ASME A 105? Thank you for your help.

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