Standard Specification

BS 10 & BS 4504 Flange Standards — British Imperial & Metric Specs

BS 10 (Tables D, E, F, H) & BS 4504 British flange standard guide: imperial bolt circles, metric PN ratings, dimensions, material options. Quote in 30 min.

Standard Overview & Scope

BS 10 and BS 4504 are historical British standards widely specified across Commonwealth countries, UK infrastructure, water authorities, and marine vessels.

Official Standard Scope

BS 10 specifies imperial British standard pipe flanges (Table D, E, F, H), while BS 4504 specifies metric circular steel flanges (PN 6 to PN 40).

Covered Size Range1/2 inch to 24 inch (BS 10) / DN 10 to DN 2000 (BS 4504)
Pressure Ratings / ClassesTable D, Table E, Table F, Table H, BS 4504 PN10, BS 4504 PN16, BS 4504 PN25, BS 4504 PN40

Related Standard & Material Guides

Water InfrastructureASME B16.5 Standard

Standard Specification FAQs

Q: Which BS 10 Table is most commonly specified in water utilities?

A: BS 10 Table E is the most widely specified imperial British flange table for general municipal water distribution lines up to 100 psi working pressure.

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