This part of ISO 11922 specifies tolerance grades for the outside diameter, out-of-roundness and wall thickness of inch-based thermoplastics pipes for the conveyance of fluids and manufactured with nominal outside diameters and nominal pressures in accordance with ISO 161-2 (see annex A).
It is applicable to smooth thermoplastics pipes of constant circular cross-section along the whole length of the pipe, whatever the method of manufacture, the pipe material or the intended application.
NOTE—It is intended that the tolerance grades specified in product standards be selected from this part of ISO 11922, taking into account the material and the intended application.
BS ISO 11922-2:1997 history
1997BS 2782-11 Method 1121C:1997 Methods of testing plastics. Thermoplastics pipes, fittings and valves. Thermoplastics pipes for the conveyance of fluids. Nominal outside diameters and nominal pressures. Inch-based series
1987BS 3867:1987 Method of specifying outside diameters and pressure ratings for pipe of thermoplastics materials (inch series)