Class 150 flange series
CLASS 150 (150LB)
Class 150 flanges are selected within a specific dimensional standard and material group. Include the required size, form and facing, and confirm the pressure–temperature rating for the design conditions.
- Nominal pressure designation
- Class 150 (150LB); 150 is a class designation, not a fixed psi operating pressure.
- Standards referenced
- ASME B16.5; ASME B16.47; BS 3293 — choose the applicable standard and size scope.
- Structure options listed
- Slip-on; weld neck; blind; lap joint; socket weld; threaded.
- Facing options listed
- RF / FF / RTJ — selected type and standard must permit the facing.
- Material specification / grade
- TBC; specify separately from Class 150.
- Ordered size and drilling
- TBC — no size-by-size dimensional table is published on this product page.
- Pressure–temperature rating
- TBC for the selected material, standard, size and operating temperature.
Confirm configuration, price, quantity and lead time for each enquiry.
Selection questions
What should I include in a flange enquiry?
Provide standard and edition, size, material specification and grade, type, pressure designation, facing, quantity, and design pressure/temperature. Include a mating drawing when drilling or bore dimensions are critical.
Does the pressure designation equal the working pressure?
No single operating-pressure value follows from PN or Class alone. Confirm the applicable pressure–temperature rating for the selected standard, material and temperature.
Can flanges of the same nominal size be connected directly?
Check the exact standard, bolt-hole count and diameter, bolt circle, bore, facing and gasket arrangement. A matching size label alone does not establish interchangeability.
Specifications compiled from available product documents。Dimensions, performance and suitability are subject to confirmed drawings and ordering documents.
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