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  • Users: daveb9
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  1. daveb9

    Design of spherically dished covers (bolted heads)

    Design of spherically dished covers (bolted heads) ASME IIIV Appendix 1 1-6 I am trying to optimise a design of a bolted head similar to FIG 1-6 (D) with regards to the thickness of the flange T. My design differs from the figure (D) by the fact that the seal is carried within the flange in...
  2. daveb9

    Calculating relief valve flow capacity temperature

    Dear All I am looking to calculate the flow rate required, to relive a tank in a fire engulfment situation. The tank is a portable tank which has a safety valve set at 500psi and is intended to carry 2 products on the outbound and inbound journeys. The problem is that the valve has to be set...
  3. daveb9

    Calculating relief valve flow capacity temperature

    Dear All I am looking to calculate the flow rate required to relive a tank in a fire engulfment situation, I have the CGA S1-1.2 Pamphlet in which is the following equation is used when calculating the flow capacities of pressure relief devices for critical and supercritical fluids, to...
  4. daveb9

    PTFE Seat Ball valve problems

    We manufacture 2" and 3" 2 piece ball valves with a maximum pressure of 500PSI for the Freon gas market My problem is that we have had some seal failures, the failures have occurred in 0.02% or less of the valves that we have produced. However, I would like to eradicate the problem completely...
  5. daveb9

    Cold Service Carbon steel

    We are manufacturing carbon steel valves for -30°C (-22F)servce I am looking for a steel specification for tube and bar that will operate at these temperatures with a minimum of pre and post weld heat treatment. At present we intend to make most the valve from SA516-70N. Dave
  6. daveb9

    Strain gauge testing stainless steel

    Dear All We have in the past Strain gauge tested some off our stainless steel designs to UG101, I have just read the bulletin (link Below) that austenitic stainless steel designs should not be tested to UG101. My questions are 1)What do the forum think of this 2)What is the best alternative...
  7. daveb9

    Filtering data and selecting from a list

    I have a number of products which I would like to select from within Excel the product have features and I would like to be able to use a list box to allow me to select the product I require For example Product feature1 feature2 feature3 feature4 XY1 y n y...

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