1 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…
2 PrincipleA test assembly of pipes and fittings (see Figure 1) is subjected to temperature cycling by the passage ofwater under pressure using hot and cold water alternately, for a specified number of cycles.While being subjected to temperature cycling, parts of the assembly of pipes and fittings are maintained under tensile stress and/or flexural strain…
X2.4 Shrinkage of Conditioned Yarns and Cords at Elevated Temperature: X2.4.1 Summary of Test Method—The initial length of a specimen of yarn or cord that has been permitted to relax in a conditioned atmosphere is determined while under a specified force. After exposure of the loaded specimen to a specified temperature until its length becomes…
Sample preparation for plastic sector depends on the material properties and shape of material is going to be tested. First question is that what do you want to test? if it is a raw material or it is finished product? If you want to test raw material, be sure that you will be testing the…
38. Stiffness of Fabric 38.4 Apparatus:38.4.1 CRE-Type Tensile Testing Machine.38.4.2 Loading Cell, 20 N (2000 gf).38.4.3 Specimen Holder—An 85-mm (33⁄8-in.) square frame made of 5-mm (1⁄4-in.) diameter steel rod. In the middle of one side is a hook made of 3-mm (1⁄8-in.) rod diameter for connecting the holder to the loading cell. In the middle…
4 Apparatus 4.1 The apparatus used for the test should be designed to comply with the following conditions. 4.1.1 It should be possible to clamp the specimen of fabric in such a way that a) it is horizontal and is not bulging; b) an area of the fabric of 100 cm2 * is subjected to…
12.12 Resistance to Impact of the Coating 12.12.1 EquipmentThe equipment shall consist of the following:(a) an impact tester having the following features:(i) 1 kg falling mass;(ii) 15.8 mm diameter ball-bearing tup;(iii) 1 m long graduated slotted tube;(iv) for laboratory-coated specimen testing, flat anvils hardened to 55 ± 5 HRC;(v) for testing specimens from test rings,…
8. Requirements 8.1 Longitudinal Reversion—When tested in accordance with ISO 15874-2, at the conditions given in Table 8, the mean relative change in pipe length shall not exceed 2 %. 8.2 Melt Flow Rate (MFR) of Pipe and Fittings—When tested in accordance with D 1238, the MFR of specimens taken from the finished pipe or…
C.1 GeneralThe test shall consist of measuring the force required for peeling the coating from the metal substrate of the pipe at a constant rate of pull.C.2 EquipmentC.2.1 Tensile testing machine, capable of recording the peel force with a 5 % reading accuracy, thatoperates at a rate of pull of 10 mm/min, as shown in…
