BS 65:1991

This standard BS 65:1991 Specification for vitrified clay pipes, fittings and ducts, also flexible mechanical joints for use solely with surface water pipes and fittings is classified in these ICS categories:

• 91.140.60 Water supply systems
• 23.040.50 Pipes and fittings of other materials

This British Standard specifies requirements for vitrified clay pipes and fittings with or without sockets, and compatible accessories, for the construction of drainage and sewerage systems, operated as gravity pipelines, or for use as ducts.

Normal and extra chemically resistant pipes and fittings are covered by the standard, when supplied without flexible mechanical joints, for example to meet repair situations or for use with special jointing compounds. Surface water pipes and fittings are also covered by the standard, together with ducts. The standard applies to both glazed and unglazed products.

The standard also specifies performance requirements for flexible mechanical joints used with surface water clay pipes and fittings.

NOTE The pipes and fittings specified may be suitable for use with joints other than flexible mechanical joints but such joints are outside the scope of this standard.

The requirements specified cover certain dimensions and tolerances, physical and performance characteristics, marking and sampling, and testing and inspection procedures to verify compliance and to facilitate quality control.

Specifies certain dimensions, physical and performance characteristics for vitrified clay pipes and fittings. For use in the construction of drainage and sewerage systems, operated as gravity pipelines, or as ducts. Requirements for sampling and marking are also given.