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  • ASME B. 31. 3 Pressure Test Limits | Eng-Tips
    Hi, ASME B31 3 calculation for Hydrostatic Pressure Test can be limited follows: (c) if the test pressure as defined above would produce a nominal pressure stress or longitudinal stress in excess of the yield strength at test temperature or a pressure more than 1 5 times the component rating
  • Weld Repair ASME B31. 3 | Eng-Tips
    From reading through ASME B31 3 I cannot see any guidance on a specific number From searching online and through forums the usual answer seems to be initial weld plus 2 repairs is good practice We have a job that has had multiple repairs including some that have been repaired twice
  • Hydrotesting Requirements of B31. 3 | Eng-Tips
    I have a hydrotest problem We have a tubing spec with a design code of ASME B31 3 designed for a maximum pressure of 15,000 psig We have successfully hydrotested our system at 22,500 psig (1 5 times design) for several of our systems However, one system uses Kalrez seats in the valves
  • Section IX, B31. 3, and impact tested WPS | Eng-Tips
    I need to qualify a welding procedure in accordance with Section IX, with the supplementary essential variables for Charpy impact testing as required by ASME B31 3 The base material is 304 SS, with production material thickness ranging from 0 500" to 1 000" in thickness This is for
  • ASME B31. 3 335. 1(c)(1), Flanged joint alignment - Eng-Tips
    Question (2): In accordance with ASME B31 3- 1996 Edition, para 335 1 1 (c), do the requirements apply to all pipe sizes and pressure rating classes? Reply (2): Yes This will still be applicable to your situation If your nozzle or extrusion is 400 mm long you are allowed max 2 mm of misalignment vertically and or horizontally
  • ASME B31. 3 - Longitudinal Seam weld | Eng-Tips
    Hi All expert, Would like to clarify if there are any provision within ASME B31 3 that allows welded pipe to have two longitudinal seam? We have ordered pipe base on ASTM A358 EFW TYP304 CLASS 1,30" NPS 1" thick The manufacturer (from India) produces the pipe with 2 plates, resulting in 2
  • ASME B31. 3 Para. 345. 2. 3 (c) Closure Welds | Eng-Tips
    According to B31 3 Para 345 2 3(c) for closure welds, this may be done as long as all components have been leak tested successfully, undergo in-process examination as per Para 344 7, and pass either 100% RT or 100% UT examination This becomes a problem when the final closure weld is a
  • Category D service. . . . B31. 3 | Eng-Tips
    Hi all, (a) Category D Fluid Service: a fluid service in which all the following apply: (1) the fluid handled is nonflammable, nontoxic, and not damaging to human tissues as defined in para 300 2 (2) the design gage pressure does not exceed 1035 kPa (150 psi) (3) the design temperature is from
  • B31. 3 Impact Hardness testing | Eng-Tips
    In B31 3, there is reference to hardness testing in accordance with 333 1 7 , see below 331 1 7 Hardness Tests Hardness tests of production welds and of hot bent and hot formed piping are intended to verify satisfactory heat treatment The hardness limit applies to the weld and to the heat affected zone (HAZ) tested as close as practicable to
  • Clarification on limits of Qualified WPS Per ASME B31. 3
    Once you qualify an ASME IX PQR it is applicable for B31 3, B31 1, B31 8, VIII etc so your qualified range shown on that WPS will be 5 mm to 22 mm as per QW 451 1 If you impact test an 11 13 mm coupon then the range is limited (only if working to B31 3) to 5 5 mm to 17 mm If you want to use that WPS for 14mm thickness in production - no problem





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