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  1. Steven23144

    Design pressure limits in ASME Sect.8 Div.1

    A pressure vessel design pressure is 230kg/cm^2G and design temp. 200℃ Can I use ASME Code Sect.8 Div.1 with "U" Stamp certification? Steven
  2. Steven23144

    utilize bolt tension device for 26" Studding Outlets

    Hi! To studding outlet pad flange, the tapped holes are provided for stud thread engagement that had been designed based on UG-44(g). However, the tapped thread connection is different form the regular stud bolts which connected with both nuts. So, what I think the regular torque using for ASME...
  3. Steven23144

    utilize bolt tension device for 26" Studding Outlets

    I am working for design a ASME 26" Studding Outlets flange for Reactor, I have question as below: (1) Is it available to design a Class 900 Studding Outlet R.J. flange for 26" ASME B16.47 series "A" nozzle? due to the connected flange type and high design pressure 87 kg/cm^2G. @ 200℃ (2) To...
  4. Steven23144

    Tighted flange with deformed flat washer

    Thanks all specialist to response my question, We had replaced all washer material into SA-540-B21, Tighten the Bolts & Nuts with hydraulic bolt tensioning equipment, eventually no deformation was found. We guess that maybe the hardness of washer are insufficient or tighten method was...
  5. Steven23144

    Tighted flange with deformed flat washer

    We use STUD BOLT 2-1/8" Diameter and 510mm Length with 2 heavy nuts, Bolts material SA-193-B7, the vessel operating temperture at 300℃ During hydrostatic test @ 25℃ all washer no deformation but when we did hot tightening up at operating condition we found the washer outer rim was rising up...
  6. Steven23144

    Tighted flange with deformed flat washer

    Hi, I have a question, when I tighten the bolts of flange casuse the washer deformation, I don't know if the washer deformation will influence the bolts tighten force. Does anyone can advise me how to calculate and approve deformation is acceptable. Steven
  7. Steven23144

    how to measure high temperature creep

    As a vessel was requested to be designed in according with ASME Section VIII Div.2 or API 579, the design temperature is 560 degree C, operating temperature is 530~550 degree C and the design pressure 3.8 bar. the used material is SA-387-22 we would like to know how to measure high temperature...

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