6.6 Determination of water vapour permeability (WVP) 6.6.1 PrincipleThe test piece is fixed over the opening of a jar, which contains a quantity of solid desiccant. This unit is placed in a strong current of air in a conditioned atmosphere.The air inside the container is constantly agitated by the desiccant, which is kept in movement…
Apparatus4.1 The apparatus required for salt spray (fog) exposure consists of a fog chamber, a salt solution reservoir, a supply of suitably conditioned compressed air, one or more atomizing nozzles, specimen supports, provision for heating the chamber, and necessary means of control. The size and detailed construction of the apparatus are optional, provided the conditions…
L.1 Lap shear strength of tape coatingsL.1.1 GeneralThe test consists of measuring the lap shear strength (maximum force per unit area) obtained in shearing a single overlap joint between a plate with metallic surface or plant coating and the FJC by applying a tensile force that is parallel to the bond area and to the…
6. Requirements 6.1 Dimensions and Tolerances: 6.1.1 Dimensions and tolerances shall be as shown in Table 1 and Table 2 when measured in accordance with Test Method D2122. The tolerances for out-of-roundness shall apply only to pipe prior to shipment. 6.2 Sustained Pressure—The pipe shall not fail, balloon, burst, or weep as defined in Test…
5 Test methods 5.1 General 5.1.1 Test conditions Any suitable test system can be used that enables the required accuracy (determined by calibration) and precision (determined by Gauge R&R) to be obtained. The repeatability and reproducibility (Gauge R&R) of the test apparatus shall not exceed 20 % of the allowed tolerance range for any given…
4 PrincipleThe test mixture, consisting of a color concentrate and a basic test polymer, is passed through an extruder fitted with melt pump and screen pack with breaker plate. In front of the screen pack is a melt pressure transducer. The pressure difference between the start pressure and the maximum pressure is used to calculate…
4 Principle A cyclic tensile test with a constant load range is imposed on a cylindrical specimen under suitable test conditions within the stress range where SCG is achieved. A circumferential notch is machined in the center of the test specimen to enable crack initiation and SCG to the final failure of the specimen. The…
3 Method E1: Tensile performance3.1 ObjectThis test method applies to optical fibre cables which are tested at a particular tensile strength in order to examine the behaviour of the attenuation and/or the fibre elongation strain as a function of the load on a cable which may occur during installation and operation. This method is intended…
8.4.2 Flexing test8.4.2.1 Apparatus8.4.2.1.1 Testing device, as illustrated in Figure 45. The test piece shall be guided in such a way that on one side it can be bent at an angle of 90° about a mandrel with a radius of 15 mm. 8.4.2.1.2 Cutting tool, as defined in Figure C.2 of ISO 5423:1992.8.4.2.1.3 Measuring…
Methods for characterization of slow crack growth Pipes made of polyethylene such as PE80, PE100 or the improved PE100RC display differing levels of sensitivity to slow crack growth. The terms “Environmental Stress Cracking” (ESC) and “Slow Crack Growth” (SCG) are used to describe this behavior. A failure of this type takes place well below the…
