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Slip-On Flanges
Slip-on flanges are limited to use under the following conditions:
ASME/ANSI B16.5 standard forged flanges for design pressures and coincident temperatures not exceeding the pressure-temperature ratings for Class 150 flanges, as specified in ASME/ANSI, except that the maximum design temperature shall not exceed 650oF (343oC).
Custom designed flanges, for design temperatures not exceeding 650oF (343oC); and for flange thickness not exceeding 3 in (76 mm).
Corrosion allowance does not exceed 1/16 in (1.6 mm).
Carbon or low-alloy steel flanges attached to solid high-alloy necks are limited to design temperatures no higher than 450oF (232oC), unless a higher temperature is justified by a complete stress analysis, and approved by the User.
Minimum design metal temperature (MDMT) is not lower than -20oF (-29oC) for carbon steel or low-alloy steel.
Vessel is not for lethal service.
Vessel or nozzle is not for cyclic pressure or temperature service, or subjected to cyclic loadings from associated equipment.
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