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Recent content by tjrush2000

  1. tjrush2000

    D1.1 with foreign equivalents

    We are in the process of placing an order for 304L fabrication to D1.1 and the vendor is suggesting that the material he is purchasing in Japan JIS SUS304L may not show yield strength on the certs. I am assuming the welding can still be performed to AWS. Will proceedures need to be qualified on...
  2. tjrush2000

    References/background information

    The following is a site that I have run across recently: http://toxnet.nlm.nih.gov/ It can be used to effectively characterize the content of above ground storage tanks. Also hazards labeling and MSDS sheets are effective tools. Expected corrosion rates in any given process or storage...
  3. tjrush2000

    Code? - To be or not to be ASME

    Rectangular vessel, 150 psi, 6" x 10" rectangular inside cross section. code exemption rule - vessels having an inside diameter, width, height or cross sectional diagonal not exceeding 6 in., with no limitation on length. it does not say - vessels having an inside diameter, width, height AND...
  4. tjrush2000

    Maximum external pressure

    External Pressure, (Corroded & at 150.00°C) UG-28(c) L/Do = 550.0000/2499.9999 = 0.2200 Do/t = 2499.9999/19.258006 = 129.8161 From table G: A = 0.004918 From table HA-4: B = 9884.8281 Pa = 4*B/(3*(Do/t)) = 4*9884.8281/(3*(2499.9999/19.258006)) = 101.5265 psi (700.0002 kPa) Design...
  5. tjrush2000

    Austenizing Temp for SA-387 Gr.11 CL. 2

    What temperature and hold time would be required to fully austenize 387-11-2 material
  6. tjrush2000

    ASME External factor of Safety

    Where can one find information do confirm the factor of safety is 4 for external pressure disign in the ASME Code.
  7. tjrush2000

    Do we need washers for pressure vessel?

    I have a large custom designed replacement blind flange being put into service. It is mating with an existing flange with blind tapped holes. As a result the bolt holes will require oversizing to allow fittup with the existing flange. 1 1/8" studs in holes as large as 1.614". Where...
  8. tjrush2000

    Atmospheric Tank Venting

    I have a 15000 gal. waste water storage tank w/ 300 ft^3/min. inflows. If I size the vent for 300 CFM which equals 5 ft^3/s at 3.28 ft/s (1 m/s) the resulting area required for the vent is 1.52 ft. Based on the sampling of atmospheric tank vents that I have seen this is very large.
  9. tjrush2000

    Where can I get copies of Material Specifications Online?

    A good source for general industry standards available for purchase is http://www.cssinfo.com/info/icbo.html. ASTM, API, ASME, ANSI etc.

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