BS EN ISO 13263:2017 pdf download

BS EN ISO 13263:2017 pdf download

BS EN ISO 13263:2017 pdf download.Thermoplastics piping systems for non-pressure underground drainage and sewerage — Thermoplastics fittings — Test method for impact strength
1 Scope
This International Standard specifies a method for testing the impact resistance of fittings by dropping them on to a rigid surface. For a fitting with seal-retaining components, such as seal-retaining caps or rings, the method includes assessment of the watertightness of the fittings when the fixing elements show damage as a result of the test.
This International Standard is applicable to fittings made from thermoplastics materials intended to be used for buried and above-ground applications.
2 Principle
The impact resistance of a fitting is tested by dropping the fitting on to a rigid surface. After impact, the fitting is inspected for any cracks visible without magnification. In the case of fittings with separate fixing elements,for example for seal retention, these elements are inspected for any permanent damage that could cause loss of watertightness.
NOTE It is assumed that the following test parameters are set by the referring standard:
a) test temperature (see Clause 3);
b) sampling procedure and frequency (see Clause 4);
c) conditioning time and temperature, as applicable (see Clause 5);
d) the height from which the test piece is to be dropped (see Clause 6);
e) the point of impact that is to hit the test base when dropped (see Clause 6);
f) test conditions for assessment of watertightness (see Clauses 6 and 7).
3 Apparatus
3.1 Refrigerator or liquid bath, capable of maintaining the conditioning temperature within ±2 °C.
3.2 Temperature-controlled environment, capable of maintaining the test temperature within ±2 °C.
3.3 Test base, comprising a solid floor made of concrete or stone at least 1 00 mm thick or, alternatively, a slab of concrete with a minimum thickness of 1 00 mm and a mass at least 20 times that of the test piece. The surface shall be rigid, flat, smooth and horizontal.
4 Test pieces
4.1 Test piece form
The test piece shall comprise a sample fitting complete, where applicable, with the sealing element and any associated means of the fixing element(s) in place.
4.2 Sampling
The sampling procedure and frequency shall be as specified in the referring standard.
4.3 Number
Unless otherwise specified in the referring standard, the number of test pieces shall be five for sizes up to and including 200 mm, and three for sizes greater than 200 mm.
5 Conditioning
Determine and measure the maximum wall thickness, e, of the sample fitting.
Place the test piece in the refrigerator, liquid bath or temperature-controlled environment (3.1 and 3.2) at the specified test temperature for at least the applicable minimum period given in Table 1 , unless otherwise specified in the referring standard.