Prouducts Defination

For the purposes of this International Standard, the following definitions apply:

Ductile Iron

Type of iron used for pipes, fittings and accessories in which graphite is present primarily in spheroidal form.


TCasting of uniform bore, with straight axis, having either socket, spigot or flanged ends, except for flanged sockets, flanged spigots and collars which are classified as fittings.


Casting other than a pipe, which allows pipeline deviation, change of direction or bore. In addition, flanged sockets, flanged spigots and collars are also classified as fittings.


Any casting other than a pipe or fitting, which is used in a pipeline, such as:

  • glands and bolts for mechanical flexible joints
  • glands, bolts and locking rings or segments for restrained joints

NOTE: Valves and hydrants of all types are not covered by the term accessory.


Flat, circular end of a pipe or fitting, extending perpendicular to its axis, with bolt holes equally spaced on a circle.

NOTE - A flange may be fixed (e.g. integrally cast, threaded-on or welded-on) or adjustable; an adjustable flange comprises a ring, in one or several parts bolted together, which bears on an end joint hub and can be freely rotated around the pipe axis before jointing.

Collar/ Coupling

Connecting piece used to join together the spigots of mating pipes or fittings.


Male end of a pipe or fitting.


Female end of a pipe or fitting to make the joint with the spigot of an adjacent component.


Sealing component of a joint.


Connection between the ends of pipes and/or fittings in which a gasket is used to effect a seal.

Push-in Flexible Joint

Flexible joint assembled by pushing the spigot through the gasket into the socket of the mating component.

Flanged Joint

Joint between two flanged ends.