AS NZS 1260:2017 pdf free.PVC-U pipes and fittings for drain, waste and vent applications.
1.4 DEFINITIONS
For the purpose of this Standard, the definitions given in AS 3500.0 and those below apply.
1.4.1 Best environmental practice PVC pipes and fittings
Pipes or fittings produced by a manufacturer meeting both of the requirements of the credit criteria prescribed in Appendix C and the normative parts of this Standard.
1.4.2 Effective seal
That part of the interface between the elastorneric seal and the spigot and socket where the contact pressure is greater than 0.4 MPa for vulcanized seals and 0.47 MPa for thermoplastic seals.
1.4.3 Effective sealing length
1 .4.3. 1 Socket-,nou,,ted seals
The distance between the cross-sectional centre of the elastorneric sealing ring installed in the socket and the root of the socket.
1.4.3.2 Spigot—mounted seals
The distance from the position of effective seal of the elastomeric sealing ring to the mouth of a socket or the point at which the mouth of a socket flares.
1.4.4 Fabricated fitting/assembly
A fitting or assembly built up by joining together, by solvent cement, elastomeric seal or heat fusion, a number of components which may be—
(a) moulded, extruded or manufactured by other means;
(b) formed by reshaping of pipe or fittings, or both; or
(c) a combination of the above.
NOTE: Moulded fittings joined by means of moulded sockets conforming with this Standard are not considered to be fabricated fittings.
1.4.5 Inside wall thickness
The thickness of the wall section in direct contact with the medium being transported (see Figure 4.1).
1.4.6 Maximum differential displacement
A relative transverse displacement between the spigot and socket surfaces at one point.
1.4.7 Minimum jointing compression conditions
The jointing condition brought about by a combination of spigot, socket and ring dimensional tolerances and ring hardness, such that with the spigot concentric with the socket, a minimum compressive force is generated between the elastomeric seal and the pipe surface.AS NZS 1260 pdf download.