C.1 Principle A specimen of the material shall be mounted in a vertical plane and shall be subjected to a continuous spray of water droplets. Measurements shall be made of the coefficient of retroreflection of the wetted surface while the spray is maintained, simulating the optical behaviour of a surface in a shower of rain….
3 Principle A test piece, consisting of PVC-U pipes mounted into a PVC-U double socket coupler, is exposed to a specific cycle of internal hydrostatic pressures for specific test periods and at a specific temperature while the assembly is simultaneously subjected to a lateral bending force. 4 Apparatus 4.1 A pressure control device, connected to…
3 PrincipleA test piece consisting of a PVC-U pipe mounted into a PVC-U socket is exposed within a specified temperature range to two specified negative internal pressures for a specified test period, while the pipe is being subjected to an angular deflection in the socket and to deformation. During the test the test piece is…
2 Principle The test simulates expansion of the joint area due to creep. This is related to the permissible working conditions for 50 years and based on the properties of the components assembled. The leaktightness of the joint(s) is tested as an assembly comprising either: a) at least one fitting joined to pipes; or b)…
3 Principle Welded corners and T-joints made from unplasticized polyvinylchloride (PVC-U) profiles are subjected to a tensile bending or compression bending test at specified temperature and test speed. The failure load is recorded and the failure stress is calculated. 4 Apparatus 4.1 Tensile or compression testing machine with the following specifications: a)measuring range of load…
3 Concepts3.1 Corrugated fibreboardBoard consisting of one or more sheets of fluted paper glued to or between one or more sheets of paper or board (facing) (from DIN 6735).3.2 Single-wall corrugated fibreboardBoard consisting of one sheet of fluted paper interposed between, and glued to, two facings (from DIN 6730).3.3 Multiple wall corrugated fibreboardBoard consisting of…
3 PrincipleThe times of flow of a solvent and a solution of resin in the solvent at a concentration of 0,005 g/ml aremeasured at 25 °C by conventional methods. The viscosity number is calculated from thesemeasurements and from the known concentration of the solution. Specific gravity difference and kineticenergy corrections are small in this method…
5 Apparatus 5.1 The test device may be constructed in different ways. In general, it consists of a horizontal test table, a sled, and a driving mechanism to produce a relative motion between the sled and the test table, regardless of which is the moving part. Figure 1 shows an example of apparatus in which…
11 Method E7: Torsion11.1 ObjectThis test method is intended to establish the ability of a fibre optic cable to withstand mechanical twisting. The primary purpose of this procedure is to measure any variation in the optical power transmittance of a fibre when the cable is subjected to torsional forces external to the cable sheath. A…
5.5 Heat reversion 5.5.1 Main profile “When tested in accordance with EN 479 for each test specimen the heat reversion (R) of the two largest opposing sight surfaces shall not be > 2,0 %. The difference in heat reversion for each test specimen between these sight surfaces shall not be > 0,4 %. 5.5.2 Auxiliary…
