BS 2782-11:Method 1121B:1997

1 Scope
2 Normative references
3 Definitions
3.1 Nominal outside diameter
3.2 Outside diameter
3.2.1 Mean outside diameter
3.2.2 Minimum mean outside diameter
3.3 Pressure
3.3.1 Nominal pressure, PN
3.3.2 Maximum allowable operating pressure
3.4 Lower confidence limit
3.5 Minimum required strength, MRS
3.6 Overall service (design) coefficient
3.7 Design stress
3.8 Standard dimension ratio, SDR
3.9 Hydrostatic stress
4 Nominal outside diameter
5 Nominal pressure rating, PN
6 Minimum required strength, MRS
Tables
1 Permitted values of nominal outside diameter
2 Permitted values of nominal pressure rating, PN
3 Permitted values of minimum required strength, MRS
Annex
A (informative) Bibliography

Defines the nominal outside diameters for metric thermoplastics pipes for conveying fluids in pressure and non-pressure applications. In addition, it defines nominal pressure ratings,. minimum required strengths and overall service coefficients for thermoplastics pipes for pressure applications. Applies to smooth thermoplastics pipes of constant circular cross-section along the whole length of the pipe, whatever the method of manufacture or construction materials.