Steel Pipe Design Pressure & Wall Thickness

P = 2·S·F·E·T·t / D (D/t ≥ 30) | P = 2·S·F·E·T·t / (D − t) (D/t < 30)

Inputs

Unit system

US Customary (in, psi, psig, °F) SI (mm, MPa, kPa, °C)

Calculation mode

Design pressure from wall thickness Wall thickness from design pressure

Outside diameter D

Wall thickness t

Specified minimum yield strength S

Design factor F

By location class (Table 841.1.6-1) By facility type (Table 841.1.6-2)

Location Class

Longitudinal weld joint quality factor E

Design temperature

°C

For intermediate temperatures, interpolate the derating factor.