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  1. Jaivishnu

    Difference between leak testing (Section ASME V) & hydrotest / pneumatic test ( ASME Section VII

    Hi I am newbie. I want to know if leak testing of pressure vessel as per Article 10 of Section V is different from hydrotest / pneumatic test of pressure vessels mentioned in UG 99 & 100 of ASME Section VIII Div 1 . Can i say that hydrotest of pressure vessels is a one-time activity or an...
  2. Jaivishnu

    ATEX certification for pneumatic actuators for ball valves

    Hi , I would like to know , if ATEX certification is required for pneumatic actuators for ball valves since these are mechanical items and no electrical circuit is involved. These actuators are for zone 1/0 hazardous areas
  3. Jaivishnu

    Factor of safety considered for pressure vessel structural supports

    Hi I am a newbie in ASME BPVC Sec VIII standard. I want to know if there are guidelines provided in the code as to the safety factor to be considered in the design of structural support for vessels. Alternatively, how are the allowable stresses for structural support materials taken? Are they...
  4. Jaivishnu

    Cable gland requirement for intrinsically safe equipment Ex ia for IIC

    Hi I am a mechanical engineer and so my electrical-related queries may appear to be totally dumb. My first doubt is: since intrinsically safe equipment is designed to produce very low energy such that ignition of the flammable mixture is avoided, is there any particular requirement that the...
  5. Jaivishnu

    Factor of safety in valves designed as per ASME B16.34

    Hi LittleInch You are correct . I meant FOS on pressure. In ASME BPVC SecII ,part D materials , allowable stress for design is taken as Yield strength / 1.5 , which indicates that a safety factor of 1.5 is considered. Pardon me if I am wrong. I was wondering if any similar consideration is...
  6. Jaivishnu

    Factor of safety in valves designed as per ASME B16.34

    Hi I am a newbie in piping. I want to know if valves designed as per ASME B16.34 have any inherent factor of safety like say 3.5
  7. Jaivishnu

    Gaskets for tongue and groove flange

    Hi, mk3223 Thanks, also, do you happen to know if there is any pressure class restrictions on Tongue and groove flanges,like it cannot be used above certain pressure ratings
  8. Jaivishnu

    Gaskets for tongue and groove flange

    Hi I am a newbie piping field engineer. I would like to know if standard dimensions of gaskets for Tongue and Groove flanges (ASME B 16.5)are listed in any of the ASME standards. I found that ASME B16.20 is for metallic gaskets and B16.21 is for non metallic gaskets but did not find any...
  9. Jaivishnu

    Allowable operating pressure based on hydrostatic test of an in-service pipeline

    Hi , I have hydrostatic tested an in-service pipeline (which has been in service for 3 years) to 60 bar. As per ASME B31.3 what should I set the maximum allowable operating pressure of the pipeline as? Can I set it as 60 bar or should it be lower by a factor? I am a newbie in this area and any...
  10. Jaivishnu

    Use coriolis mass flowmeter for both liquid & gas measurement

    Hi, Can a Coriolis mass flowmeter sized for gas flow measurement be used for liquid flow measurement also?
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