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  • Users: pingmi
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  1. pingmi

    ASME design standard for SG iron globe valves

    Hello, I need to know the ASME standard for design / construction of SG Iron globe valves. I believe ASME B16.34 standard is applicable to steel, nickel-base alloys, and other alloys only. Kindly advise. Thanks in advance.
  2. pingmi

    Elevated Temperature Tensile Properties of CA-40

    Hello, I need to know Elevated Temperature Tensile Properties of martensitic stainless steel casting grade CA-40. I searched on internet but could not identify suitable source for this information. Also I need to know if CA-40 material shows drop in corrosion resistance above temperature of...
  3. pingmi

    High Pressure High Temperature Bolting

    Hello, I need to select suitable bolting material for bonnet studs / Nuts of a High Pressure valve. Following are the specification: Valve body / Bonnet material : ASTM A182 Grade F91 Body design Condition: Class 2500 Maximum Operating pressure: 220 barg Maximum Working temperature: 610°C...
  4. pingmi

    Welding CA40 fiiting to Carbon steel

    Hi, I need to weld a fitting made up of CA-40 (Martensitic stainless steel) material to carbon steel (A106) pipeline. The fitting end connection size is 25NB Socket Weldable. I’m looking for the advice on the following: • Welding consumables (SMAW) • Recommended Preheat Temperatures •...
  5. pingmi

    Fabricated Tee Design

    Hello, We need to review designs of fabricated Equal Tees (Sizes- 52" NB Tee & 36" NB Tee) as per ASME B31.3 for low pressure applications. As far as I know, ASME B31.3 won't allow welded branch where branch & run pipe sizes are same. Hence it would be safer approach to analyze these branch...
  6. pingmi

    Large Size Tee & Flange dimensions

    Hello, I need to refer to the international standards related to following items:- (1) Large size (72" NB ) Tee (Fabricated type) butt weldable ends (2) 72" NB Flanges I referred to standards like ASME B16.9 for butt weldable fittings and ASME B16.47 for large size flanges but their scopes...
  7. pingmi

    Flange Hydrotest pressure (EN1092-1)

    Hello, I referred to EN 1092-1-2007 standard for hydrostatic test pressures & test duration of PN designated flanges. However I could not find any such reference in that standard. If I recall correctly, old versions of applicable DIN standards for steel flanges used to mention minimum test...
  8. pingmi

    Flange Hydrotest pressure (EN1092-1)

    Hello, I referred to EN 1092-1-2007 standard for hydrostatic test pressures & test duration of PN designated flanges. However I could not find any such reference in that standard. If I recall correctly old versions of applicable DIN standards for steel flanges used to mention minimum test...
  9. pingmi

    High Pressure Electric Boiler

    Hi, We are looking out for an electric bolier (for R&D Lab) with following specifications: Steam flow - 300 Kg/hr Pressure - 100 Barg max Can you pls help me with information on boiler manufacturers? Thanks in advance.
  10. pingmi

    High Pressure Valves (Steam Application)

    Hello, Can anyone suggest Valve manufacturers who make High pressure (Class 2500) 3-way valves & Stop Valves for superheated steam (150 Barg / 550°C) application? Thanks in advance.
  11. pingmi

    Valve Stem Threads

    Hi, It is observed that Valve Stem / Bonnet thread profiles are either ACME or Trapezoidal in most of the designs. I was wondering why other thread profiles like Metric, UN are not used for this application. Any reasons? Thanks in advance.
  12. pingmi

    Welding Electrode

    Hi, I need to know suitable electrode in order to weld Carbon steel pipe (ASTM A106 Gr B) to Forged Alloy Steel Valve body (ASTM A182 F22) by SMAW process. Is Preheating required? Any PWHT recommended for this process? Where would I get information on elctrodes for welding dissimilar metals...
  13. pingmi

    Pressure drop calculation for mesh lined screens

    Hello, I need to calculate pressure drop of differenet fluids (steam, water etc) for mesh lined screen used in Y-Type and T-Type strainers. Are there any calculation procedures / guidelines laid down? Thanks in advance.
  14. pingmi

    Cyanide Zinc Plating

    Hi, I need to know if there are any regulations / laws which restrict use of cyanide based zinc plated industrial products in USA and Europe. I searched but could not find any such regulations. The products that we plan to plate include piping components like valves, connectors etc. Thanks in...
  15. pingmi

    Austenitic SS for Steam Application

    Hi, Would it be a good idea to make a pipe fitting out of ASTM A182 Gr F316 material for an application where steam at high pressure / temperature (100+ Barg / 525°C) is present? I'm not sure if plain austenitic steels like gr 316 would end up with Intergranualar Corrosion at temperature 525°C...
  16. pingmi

    Stem Packing for high pressure / temperature

    Hi, I'm in process of designing a valve for a steam / condensate application 250 barg pressure and 525°C temperature. In order to select suitable stem packings, I need to explore different seal / packing options that provide reliable sealing (Class VI Leakproofness). I know graphite (with SS...
  17. pingmi

    Condensate Contamination

    Hello, I need to know what all types of contaminants one can expect in the condensate? Do we have any reference material / website where this information is available? Thanks in advance.
  18. pingmi

    Valve Design Standard

    Hi, Please let me know different Codes / Standards used for design of Pressure Reducing Valves? Thanks in advance.
  19. pingmi

    Hydrotesting at Elevated Temperature ??

    Hello, I need to perform a leakage test at elevated temperature 315°C and at pressure of 153.1 barg. The test needs be performed by keeping the test piece (3" Square x 2" Long) in a High temperature Chamber and pressurizing it with test fluid. Keeping in view the safety aspects, I thought it...
  20. pingmi

    Seal Testing at Elevated temperatures

    Hello, I need to perform a leakage test of a seal at eleavated temperature 315°C and at pressure of 153.1 barg. The test would be perfomed by keeping the test piece (3" Square x 2" Long) in a High temperature Chamber and pressurizing it. Keeping in view the safety aspects, I thought it would...

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