ASME B16.5 Pressure–Temperature Rating Calculator

Estimate the maximum non-shock working pressure for a weld neck flange by pressure class and operating temperature (Group 1.2 materials, e.g. common carbon-steel forgings). Always confirm against ASME B16.5-2020 for your exact material group.

Reference: ASME B16.5-2020 pressure–temperature ratings, material Group 1.2. Values are linearly interpolated between published temperature points and rounded. Ratings for other material groups (e.g. stainless Group 2.x, alloy) differ — the governing standard prevails. 1 bar ≈ 14.5 psi.