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  • Users: jclsws
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  1. jclsws

    SS NPT pipe in liquified gas service

    We are using 2" and smaller Sch 80 stainless pipe with NPT connections in a liquified gas application. We have found that tightening the joints to seal at room temperature will maintain a seal when vapor is introduced, but will begin leaking when the liquified gas (propane) is introduced. Would...
  2. jclsws

    SA-517 Grades B and E

    Hello all, We are in the planning stages to build an ASME Section VIII, Div. 1/MC-331 pressure vessel cargo tank. The vessels in our application are typically built from SA-517 material. I have seen two grades used for construction. Most are made from Grade E, but I have seen a couple that are...
  3. jclsws

    Qualification for Liquid Penetrant Testing

    What level of personnel qualification is required to perform a liquid penetrant test on a Section VIII vessel? Our personnel have completed Level 1 and 2 classes.
  4. jclsws

    Hight strength stainless steel for cryogenic application

    I am looking for a high strength stainless steel to use for tension rods. The environment is cryogenic, so the material should be austenitic. Standard 304 and 316 grades do not have the strength I need to keep the number of rods to a minimum. I have been looking at XM-19, but it seems to be...
  5. jclsws

    Superinsulation Sources

    Does anyone have a good source for multilayer super insulation for cryogenic transport dewars? Thanks.
  6. jclsws

    LNG Tranport Trailers

    Hello, first time poster here. I am very new to the field of cryogenics. With regerd to the materials of construction for cryogenic transport trailers for liquified natural gas (LNG), why aren't these trailers made from aluminum? I know that aluminum is used for the tanks for other cryogenic...

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