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ISO 4633-2015 pdf free download
ISO 4633-2015 pdf free download.Rubber seals Joint rings for water supply, drainage and sewerage pipelines Specification for materials
Joints étanches en caoutchouc — Garnitures dejoints de can alisations d’adduction et d’évacuation d’eau (égouts inclus) — Specification des matériaux.
4.2 Requirements for finished seals
4.2.1 Dimensional tolerances
Tolerances shall be specified from the appropriate classes in ISO 3302-1.
4.2.2 Imperfections and defects
The seals shall be free of defects or irregularities which could affect their function. Classification of imperfections shall be in accordance with ISO 9691. as follows:
— surface imperfections in zones involved in the sealing function, as described in ISO 9691:1992,4.1.1, shall be considered as defects;
— surface imperfections in zones not involved in the sealing function, as described in ISO 9691:1992, 188.8.131.52 b), shall not be considered as defects.
Major surface imperfections in zones not involved in the sealing function, as described in ISO 9691:1992. 184.108.40.206 a), could be considered as defects. This shall be agreed upon between the interested parties, the acceptance criteria depend upon the seal type or design.
Internal imperfections as described in ISO 9691:1992, 4.2 could be considered as defects. The compressive force referred to in ISO 9691:1992 can be determined in accordance with ISO 7743. The acceptable limiting values of the compressive force shall be agreed upon between the Interested parties. These values depend upon the seal type or design.
When determined by the micro-test method specified in ISO 48, the hardness shall comply with the requirements given in Table 2.
If the dimensions of a seal are appropriate, the normal test method specified in ISO 48 may be used provided that the micro-test method is used for reference purposes.
For the same seal, or along the greatest length of an extruded profile cut to make the seal, the difference between the minimum and maximum hardness shall not be more than 5 IRHO. Each value shall be within the specified tolerances.
4.2.4 TensIle strength and elongation at break
The tensile strength and elongation at break shall be determined by the method specified in ISO 37. Dumb-bell-shaped test pieces of type 1, 2, 3, or 4 shall be used. Type 2 is the preferred type. The test report shall state the dumb-bell type whenever type 2 is not used.ISO 4633-2015 pdf free download.
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