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  • Users: bck2ftr
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  1. bck2ftr

    ASME B16.9 - factor f for proof test

    My query is regarding consideration of factor f as stated in Table 9.3.1-1 of ASM B16.9 One of our supplier submitted proof test records wherein he has used an assembly of two equal tees, two 90 deg elbows and two caps of 4" size 10 mm thickness. In proof test calculations, he considered...
  2. bck2ftr

    Welding of SS321 pipe with SS347

    Dear Material experts, I have a pipe spool of SS321 being used for 1" riser along the flare stack. I have short supply of material SS321, 1" pipe Please suggest if I can use SS347 pipe spool available with me. I need to weld the material as it has socket weld joints. As per my study, E-347-16...
  3. bck2ftr

    Pneumatic test pressure less than 1.1 times design pressure

    Dear Friends, Here I am having a lines for which Design Pressure is 39 Kg/cm2g. The line needs to be complete dry, hence we are going for Pneumatic test. As per Code ASME31.3, the Pneumatic test pressure comes out to be 1.1 x 39 = 42.9 Kg/cm2g As I understand, such high pressure is not...
  4. bck2ftr

    when to follow ASTM A530 for hydrotest pressure calculations.

    In general for process piping ASME B31.3 is used for calculation of Hydrotest pressure. Today I came across ASTM A530, which also specifies as "each length of pipe shall be tested by the manufacturer to a hydrostatic pressure which will produce in the pipe wall a stress not less that 60 % of the...
  5. bck2ftr

    Extended stem valves

    Where can I find advantages and disadvantages of extended stem valves? Is it a Good Engineering Practice to use extended stem valves?
  6. bck2ftr

    Difference between Galvanizing and HOT DIP Galvanizing

    Dears, In the current project I am working , I came across the term "Hot dip galvanizing". Is there any difference between galvanizing and hot dip galvanizing? Is HOT DIP galvanizing any special process?
  7. bck2ftr

    AWWA C207 Class D flanges

    I have following Item to be procured: " Flange - Plate, Carbon Steel Per Indian Standard IS 2062 Grade B, 10 Bar WorkingPressure, Per AWWA C207 Class D" However in the AWWA C207 standard Class D stands for 175-150 psi. It does not mention 10 Bar. Should I procure as 150 psi flange?
  8. bck2ftr

    SS 316 for Vent line

    We have a 3/4" vent line from equipment of SS304 (300#) material as per P&ID. After the Isolation valve (3/4") there is a spec break shown. The next specification stands for SS316 (150#) material. I want to clarify a doubt here. Why did the process engineer chose SS316(150#) instead of...
  9. bck2ftr

    spectacle blind of ASTM A105 instead of ASTM A515 Gr.70

    For steam service, Can I use a spectacle blind of material ASTM A105 instead of ASTM A515 Gr.70? What is the criteria for evaluation of the possibility?
  10. bck2ftr

    Spectacle Blind of ASTM A182 F304L, Instead of ASTM A240-304

    Can I use a spectacle blind of material ASTM A182 F304L instead of ASTM A240-304? What is the criteria for evaluation of the possibility?

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