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  1. Metma

    ASME B31.3 table 304.1.1 Y for Low Aolloy

    dear all, with reference to ASME B31.3 Table 304.1.1 Values of Coefficient Y Low Alloy Material Like A335-P11 or A691 1.25Cr or A234-WP11 which is the group to take as reference for thickness calculation ? "Ferritic Steel" or "Other ductile metals" ? thank for your supports regards
  2. Metma

    ASME B31.3 table 304.1.1 Low Alloy Steel

    dear all, with reference to ASME B31.3 Table 304.1.1 Values of Coefficient Y Low Alloy Material Like A335-P11 or A691 1.25Cr or A234-WP11 which is the group to take as reference for thickness calculation ? "Ferritic Steel" or "Other ductile metals" ? thank for your supports regards
  3. Metma

    B16.5 verification tool

    I provide an excel verification tool for ASME B16.5. For info contact me at mat.deg@hotmail.it
  4. Metma

    B16.5 verification tool

    is it legal to develop and sell an excel sheet that permit to verify flanges pressure ratings through ASME B16.5? Thanks
  5. Metma

    Pipe calculation algerin aarh/dgm

    I'm looking for info regarding thickness calculation to be applied in Algeria cuntry. Are There additional requirents to asme B 31.3 ? Thanks in advance for help me
  6. Metma

    Design of Branch connections - B31.3

    Referring to para 304.3.3 of B31.3, is the calculation formula applicable to 'Set In' configuration (branch insterted in the cutted Run Pipe) or to 'Set On' configuration (branch put on the cutted Run Pipe)...
  7. Metma

    Weldolets in GOST standards

    Dears, I ask you if weldolet are foreseen in russian standard GOST 32569 / 32388. Regards metma
  8. Metma

    LTCS LCB/LCC/LF2 with impact test at -52°C

    Dear all, our client is asking us to specify LTCS material impact tested at -52°C. Anybody have any experience about values of impact tests at this Temperature for cast (A352-LCB/LCC) and forged (A182-LF2) grades? Thank you in advance
  9. Metma

    how to calculate the thickness for Vacuum condition as per ASME B 31.4

    hello thanks for your reply .. as per ASME B 31.4, allowable stress considered for thickness calculation are 0.72 x yield stress. my basic doubt is whether vacuum thickness calculation applicable for ASME B 31.4, if yes then what will the ASME code to be followed. ASME B 31.3 states ASME Sec...
  10. Metma

    how to calculate the thickness for Vacuum condition as per ASME B 31.4

    Hi, I have referred ASME B 31.4 edition 2012, where it is not clearly mentioned about the code or procedure to be followed for straight pipe under external condition . whereas in ASME B 31.3, stated according to ASME sec VIII UG28. my queries are. 1. how to verify the pipe thickness for full...
  11. Metma

    Use of monogram API 6A

    Dead all, It is possibile apply api monogram on flanges or valves where some dimensions have been chanced respect to API 6A ? Thks
  12. Metma

    B474-UNS08825 welded pipe instead of B705-UNS08825

    Dear All , In ASME B 31.3 -2012 edition, we found that allowable stress for B705 material is availble in TABLE A-1, but for B474-UNS08825 not available. In this concern, as we have calculated the Thickness of pipe based on the allowable stress for B705. can we accept the deviation of B474 pipe...
  13. Metma

    Non slam High integrity valves

    Hi all we have recieved from our process dept a request to specify non slam high integrity design check valves. Could you help us to understand the meaning of "High Integrity" ? thank for your helps regards metma
  14. Metma

    ASME B16.9 BW Fittings - Interpretation about the desing proof test

    Thank you for your reply, I confirm that the correct paragraph is 9.4.3. I have already asked and interpretation to ASME, and they reply to me that they will take care of the question during next commitee meeting (next month). Once I will have the reply, I will post it. Regards Metma
  15. Metma

    ASME B16.9 BW Fittings - Interpretation about the desing proof test

    I have purchased some big stainless steel reducers designed according to ASME B16.9. In order to qualify the desing, I have asked to the manufacturer the proof testing, but I got a certificate relevant to a carbon steel reducer. So my question is: can a proof test certificate relevant to a...
  16. Metma

    info request about TSM 1424 Gr B

    Good afternoon. In the coal power plant I am taking care, there is a cast valve made of TSM 1424 Gr B: could you please suggest me what kind of material is that? do you have any datasheet? The only thing I know is that it is a Cr-Mo-V steel, anything else. Thank you very much for your help...
  17. Metma

    Is there an HDPE flange that bolts to an ANSI CS flange?

    You could use: -HDPE gathering line: HDPE adaptor (stub end) and cs ANSI free flange (lap joint); -cs header: CS regular ANSI flange. In this way nuts work on two cs flanges instead of a HDPE flange and a cs flange; for this reason facing of the mating cs flange (header side) can be both RF and...
  18. Metma

    Lateral Branches

    I have collected some info. The 20 deg lateral in subject (I attach a sketch) is used to collect polymer powder from different reactors and to carry it, through a vertical pipe, to a below reactor; the slope of 20 deg (from a vertical axis) is required in order to prevent powder from settling on...
  19. Metma

    Invar or Ni36

    Dear pbrown, last month we had the same matter for a cryogenic line in a LNG plant, for which we considered whether to use a high Ni alloy or a SS304. In particular we have taken 9%Ni (ASTM A353 and A553) and 36%Ni (Alloy 36) into consideration: -pipes are available for both materials (at...
  20. Metma

    Lateral Branches

    Thank you all for your answers: on Monday, from the office, I will post a sketch and some details to share with you this matter. Unfortunately I confirm you that there is no possibility of a joint redesign. Regards

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