Thickness Calculator
SMYS grades: L245=245 MPa · L360=360 MPa · L415=415 MPa · L485=485 MPa
1.5 for normal operating conditions per EN 1594
1.0 for seamless or fully tested longitudinal welds · 0.85–1.0 for other welds
About EN 1594
EN 1594 is the European standard for gas supply systems — pipelines for maximum operating pressure over 16 bar. It covers design, construction, testing, and operation.
Formula Used
e = (p × D) / (2 × Rp × fw / S + p)
Variables
- e — Minimum wall thickness (mm)
- p — Design pressure (bar)
- D — Outside diameter (mm)
- Rp — SMYS (MPa or N/mm²)
- S — Safety factor
- fw — Weld factor
- c — Corrosion allowance (mm)
Key Requirements
- ▸Applies to steel pipelines with MOP > 16 bar
- ▸Covers design, construction, testing and operation
- ▸Requires hydrostatic pressure testing
- ▸Specifies location class factors for populated areas
- ▸Mandates cathodic protection for buried pipelines
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