AS/NZS 4441:2017 pdf free.Oriented PVC (PVC-O) pipes for pressure applications (ISO 16422:2014, MOD).
5 Material
5.1 General
The material from which the pipes are made shall be PVC-U compound/formulation. This compound/formulation shall consist substantially of PVC-U resin/powder to which shall be added only those additives necessary to facilitate the production of pipes and fittings in accordance with this International Standard. All additives shall be uniformly dispersed.
5.2 Rework material
The use of the manufacturer’s own reprocessed material, produced during the manufacture and works testing of products and conforming to the material requirements of this International Standard, is permitted. Reprocessed or recycled material obtained from external sources shall not be used.
6 Effect of materials on water quality
All plastics and non-plastic materials for components of the PVC piping system, e.g. pipes, fittings, valves, elastomeric sealing rings, solvent cement, and lubricants, when in permanent or in temporary contact with water which is intended for human consumption, shall not adversely affect the quality of the drinking water. Where applicable, all materials for components shall conform to the current national regulations concerning materials in contact with drinking water.
7 Material classification
7.1 MRS value
Oriented pipes made from a defined PVC-U compound and with a well-defined orientation level in circumferential and axial direction, shall be evaluated according to the procedures of Annex A. The minimum required strength (MRS) values shall be classified in accordance with 73 and Table 1.
7.2 Design coefficient
The design coefficient of oriented PVC-U pipes shall be a minimum of 1,6. Alternatively, 1,4 is permitted for MRS 450 and MRS 500, provided that axial contraction of the pipe (due to higher design stress) does not result in pull-out of the joints. In this case, evidence shall be given according to Annex B.
9 General requirements for pipes
9.1 Appearance
When viewed without magnification, the internal and external surraces or tne pipe snail ne smootn, clean, and free from scoring, cavities and other surface defects which would prevent conformity with this International Standard. The material shall not contain visible impurities. The ends of the pipe shall be cut cleanly and square to the axis of the pipe.
9.2 Opacity
If a pipe is required to be opaque for use in above ground applications, the wall of the pipe shall not transmit more than 0,2 % of visible light falling on it when tested in accordance with ISO 7686.
10 Geometrical characteristics for pipes
10.1 Measurement
The dimensions of pipes shall be measured in accordance with ISO 3126.
It is recommended that pipes be supplied in one or more of the following lengths: 6 m, 10 m, 12 m, where
these lengths do not include the depth of any (integral) socket(s).
10.2 Outside diameters and wall thicknesses
The nominal outside diameter of pipes in accordance with ISO 161-1, and the corresponding wall thickness, shall be selected from Table 2 as appropriate for size, nominal pressure anti pipe material class.
The tolerances on mean outside diameters shall be in accordance with ISO 11922-1, grade C.
The tolerances on the mean wall thickness shall be specified by the manufacturer; otherwise, they shall be in accordance with ISO 11922-1. grade W.
NOTE Due to the additional processing step of the orientation of the material, the spread on mean wall thickness of the PVC-O pipe could be increased.
The tolerances on out-of-roundness shall be in accordance with ISO 11922-1, grade M. For PN 25, nominal diameters from ISO 2531 can also be used.AS/NZS 4441 pdf download.