Scope This standard specifies a method for testing the resistance of joints to pressure cycling. It is applicable to piping systems based on rigid or flexible thermoplastics pipes intended to be used in hot and cold water applications. 3 Apparatus 3.1 Pressurizing device, capable of applying and regulating the water pressure in the test piece…

4.2 ApparatusThe following apparatus shall be used:a) a device for generating a controlled amount of ozone;b) a means for circulating ozonized air under controlled conditions of humidity andtemperature through a chamber containing the test pieces to be tested;c) a means for the determination of ozone concentration;d) a suitable device for the clamping and elongation of…

4 PrincipleAir is compressed by the weight of a vertical cylinder floating in a liquid. A test piece is in contact with thecompressed air and the cylinder falls steadily as air passes through the test piece. The time for a givenvolume of air to pass through the test piece is measured and from this the…

9.1 Type tests and test sequences 9.1.1 The characteristics of circuit-breakers are verified by means of type tests. Type tests required by this standard are listed in table 8. 9.2 Test conditions The circuit-breaker is mounted individually, vertically and in free air at an ambient temperature between 20 °C and 25 °C, unless otherwise specified,…

6 Test pieces6.1 GeneralMiniature test pieces might give somewhat different, usually higher, values for tensile strength and elongation at break than the larger test pieces.Seven types of test piece are provided, i.e. dumb-bell-shaped types 1, 2, 3, 4 and 1A and ring-shaped types A (normal) and B (miniature). The results obtained for a given material…

8.9 Test 9 — Corner drop test8.9.1 PurposeThe purpose of this test is to determine the diagonal rigidity of the top deck of the pallet and its resistance to impact. 8.9.2 ProcedureMark the two measuring points, A and B, as shown in Figure 9 at approximately 50 mm from the corners of the pallet. While…

4 Description of the test apparatus4.1 Glow-wireThe glow-wire is formed from nickel/chromium (> 77 % Ni/20 ± 1 % Cr) wire, having an overall diameter of 4,00 mm ± 0,07 mm (before bending). The dimensions of the glow wire loop are as detailed in Figure 1.A new glow-wire shall be annealed for a total of…

4 PrincipleThe impact strength of suitably sized test specimens is determined by striking them with a lubricated weighted striker dropped vertically from a known height. The test specimen is impacted at its centre by a striker, perpendicular to the surface of the specimen.Two methods of adjusting the energy at impact are permitted: altering the mass…