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  1. JohnsonMadukayil

    Valve Body Thickness

    Thanks for the repsonse Jim. For class 1, 2 and 3 applications in the Nuclear Industry, we have been supplying threaded relief valves since the last 6 years or so. You are correct in saying that Table 4 of ANSI B16.34 shows only the Female NPT thread ends. But then paragraph 6.2.4 of ANSI...
  2. JohnsonMadukayil

    Valve Body Thickness

    I am currently working on a Design Report for a Threaded Pressure Relief Valve for a Nuclear application. ASME Section III recommends the use of ANSI B16.34 for body min wall thickness and pressure rating calculations. Table 3 of B16.34 is used for the body wall. While Table 4 is to be used for...
  3. JohnsonMadukayil

    Arrhenius Equation and Activation Energy

    I had asked Parker Technical support. They did send documentation saying that the EPDM Oring can withstand 10exp6 rads over a period of 5 years. But this info. may not be enough.
  4. JohnsonMadukayil

    Arrhenius Equation and Activation Energy

    The working fluid is Air, pressure is 160 psig and the temearuter is 49 Celsius normal and 135 Celsius max. The manufacturer (Parker) has no clue. Called up Dupont Engineering to see if they have some idea, and left them a message. The valve is going into a nuclear utility.
  5. JohnsonMadukayil

    Arrhenius Equation and Activation Energy

    Is there a Arrhenius Plot out there for EPDM? We are trying to calculate the qualified life of an EPDM O ring in a valve using the following equation: ln(life) = (E/K)(1/T) + Constant where E = activation energy K = Boltzmann's Constant T = absolute temperature Constant =...
  6. JohnsonMadukayil

    Between Toyoda FA550-II/630 and Kitamura Mycenter HX630i

    Between Toyoda FA550-II/630 and Kitamura Mycenter HX630i, which one is a better machining center?
  7. JohnsonMadukayil

    Norem

    Anyone familiar with 'NOREM' for hardfacing applications?
  8. JohnsonMadukayil

    Stelliting

    Anyone having a Descriptive Procedure on Stelliting, can you please show me the way? Thanks
  9. JohnsonMadukayil

    Stelliting

    Anyone having a desriptive procedure on Stelliting, can you please show me the way?
  10. JohnsonMadukayil

    part for Cincinatti Machining Centre T-10-60

    Hi, Anybody in Canada/US has a spare (new/rebuilt) Cincinatti Milcraon T-10-60 (Horizontal Machining Centre)part to spare? It is a valve for the Indexing Table (rotary B-Axis). The part number for the same is 3350259F. Our Machine is Down and Cincinnati Milacron in Ohio is asking for 4 weeks...
  11. JohnsonMadukayil

    Cincinnati Milacron T-10-60

    Hi, Anybody in Canada/US has a spare (new/rebuilt) Cincinatti Milcraon T-10-60 (Horizontal Machining Centre)part to spare? It is a valve for the Indexing Table (rotary B-Axis). The part number for the same is 3350259F. Our Machine is Down and Cincinnati Milacron in Ohio is asking for 4 weeks...
  12. JohnsonMadukayil

    Hi I wanted to calcualte the stora

    Hi I wanted to calcualte the storage capacity of Racks which are used for storing incoming goods... Might involve the analysis of trusses...which is complicated....there are welded joints....and bolted joints too....any simple mechanicsm to do the calculations....? Thanks
  13. JohnsonMadukayil

    How to do the Air Turnover Calculat

    How to do the Air Turnover Calculations for a space (our machine shop here) which is 200, 000 cubic feet and there are two ceiling exhaust fans which are 6000 cfm each. Like for how much time should both the fans be kept on in an hour to ensure at least one air turnover per hour? There is no air...
  14. JohnsonMadukayil

    Galling

    We are trying to subject a safety valve to a functional test of 670 cycles of performance. And we notice gall setting in at the sliding contact surfaces (after a few cycles) which are typically SS 316/SS 316/SS 316. We changed this to Nitronic-60/SS 316/SS 316. And Nitronic - 60 is safe. But 316...
  15. JohnsonMadukayil

    What is the tolerancing requirement

    What would be the optimum tolerancing to maintain the functionality of the components in the system without them rubbing against each other?
  16. JohnsonMadukayil

    What is the tolerancing requirement

    What is the tolerancing requirements in reciprocating components? Like in a reciprocating compressor between the piston and cylinder..... Johns
  17. JohnsonMadukayil

    Porosity in Castings

    Hi friends, Is there any standard for defining the level of porosity in a casting, on the surface of the castings or on the surface of a finish machined casting/product? It is true that the level of porosity is accepted or rejected as per any particular industrial application and this...

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