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  • Users: Duwe6
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  1. Duwe6

    Hi-Temp Stainless Thread Lube

    We have a 304-bodied slide valve that bolts up to pipe flanges using tapped holes in the body. Valve runs at about 1100°F for 1 to 4 months. Bolting currently in use is also 304 s/s. We have tried Milk of Magnesia, FelPro C5A never-seize, and ceramic coating the bolts. Nothing works well...
  2. Duwe6

    Michigan U-stamp

    Anybody done business in Michigan? We are being offered a new vessel fabricated in 'the manner of ASME VIII' but without the "U"-stamp or National Board listing. My reading of the posted MI laws regarding pressure vessels [vs. Boilers] is that MI does not regulate vessels. We are thinking of...
  3. Duwe6

    "Butter" Welding

    "Butter" means to apply a layer of weldmetal over the basemetal, like buttering toast. If a pipe is too short when dropped into place, it can be pulled out and one [or both] ends "buttered" with weldmetal to lengthen it. Basemetal with 'problem' properties like P22 or old, brittle oil tank...
  4. Duwe6

    Stress: B31.1 vs. B31.3

    Does anyone know if the Stress Table values of B31.1 and B31.3 are identical? So far, they look that way to me.

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