3 Apparatus Ordinary laboratory apparatus and 3.1 Sieve, of diameter 100 or 200 mm, with a nominal mesh aperture of 500 µm, complying with the requirements of ISO 665. 3.2 Tamping volumeter (see the figure), composed of the following items. 3.2.1 Measuring cylinder of capacity 250 ml, complying with the requirements of ISO 4788, fitted…

5 Test apparatusThe test apparatus consists of the following:5.1 Test chamberThe test rig (see Figures 1a and 1b) shall comprise a vertical test chamber having a width of (1000 ± 100) mm, a depth of (2000 ± 100) mm and a height of (4000 ± 100) mm; the floor of the chamber shall be raised…

8 Test specimens and conditions8.1 Test specimensThe sample shall include 25 specimens taken at random from a lot of at least 500 emitters/emitting units. A specimen is composed of either one emitter or one non-truncated emitting unit from the emitting pipe. The number of test specimens (emitters/emitting units) required for each test is indicated in…

6 Apparatus6.1 Tensile Testing Machine, with a reversible chart, complying with the requirements listed for Method A of Test Methods D882 with grips satisfactory for the purpose. Refer to section on grips in Test Methods D882.6.2 Specimen Cutter, capable of producing nick-free 1±0.001 in. (25.4±0.03 mm) testing strips, with a precision of 1 ± 0.001…

5 Apparatus5.1 Heating equipment, consisting of one of the following (5.1.1, 5.1.2 or 5.1.3) that will accept aminimum of two test frame assemblies and a cooling device (5.1.4).The heating equipment shall be provided with means of temperature control, enabling the temperatureto be raised at a uniform rate of (50 ± 5) K/h or (120 ±…

2 PrincipleSmall samples of raw-material pellet or material removed from the pipe or fitting are heated and compressed between microscope slides. Alternatively, a microtome slice can be taken.The specimens produced are examined microscopically and the sizes of particles and agglomerates are measured, recorded and graded by comparison with a tabulated grading system (see Table A.1).A…

4 Material 4.1 PP-compound The compound for pipes and fittings shall be PP-base material (homopoiymer or copoiymer) to which are added those additives that are needed to facilitate the manufacture of components conforming to the requirements given in this standard. In orderto conform to national requirements on fire regulations other additives may be used. Fabricated…

14.2 Test conditions During the tests for IPXl to IPX6 the water temperature should not differ by more than 5 K from the temperature of the specimen under test. If the water temperature is more than 5 K below the temperature of the specimen a pressure balance shall be provided for the enclosure. Adequate safety…