4 PrincipleA test specimen is mounted in a gas transmission cell (see Figure I) so as to form a sealed barrier between two chambers. The lower-pressure chamber is evacuated, followed by evacuation of the higher-pressure chamber. A gas is introduced into the evacuated higher-pressure chamber and permeates into the lower-pressure chamber. The permeation of gas…

Apparatus5.1 The apparatus shall be constructed essentially as shown in Fig. 1, using the following components common to both test methods: 5.1.1 Dart Well—If the dart impact machine utilizes an enclosed dart well, it must contain a single unobstructed vent with a minimum area of 625 mm2 (~1 in.2 ) to provide adequate venting.NOTE 3—Some…

8.2.6 Maintain the temperature of the cooling water at 21 +- 2°C. Determine the temperature of the cooling water immediately after it leaves the test apparatus for each cooling plate. 8.2.7 If an electric chilling apparatus is used to control the cooling plate temperature, maintain the required temperature as noted in 8.2.6. Measure the temperature…

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 ±…

6.6 Preparation of test specimens to determine compliance with the requirements for creep, dimensional change and compressive strength6.6.1 TemperaturePrepare specimens at (23 +- 2) ºC, unless specified otherwise.6.6.2 MixingMix a mass of the amalgam sufficient to make a test cylinder (8 +- 1) mm high after condensation into the die shown in Figure 1. If…

6 Apparatus6.1 Blanking Die—A die suitable for cutting test specimens to the dimensions and tolerances shown in Fig. 1.NOTE 1—The length of the specimen can be changed to suit the design of the test apparatus. However, there should be a constant neck section with length at least 13 mm (0.5 in.) long. The width should…

A.6 Particle size of the epoxy powderA.6.1 EquipmentThe equipment required shall consist of the following:A.6.1.1 Air-jet sieving unit, with vacuum cleaner attachment and 150 µm and 250 µm screens.A.6.1.2 Balance, accurate to 0,01 g.A.6.2 ProcedureA.6.2.1 Weigh the sieve and one screen to the nearest 0,01 g. Place approximately 20 g of epoxy powder onto the…

(a) Criteria for Acceptance. (1) At least three specimens of cargo compartment sidewall or ceiling liner panels must be tested. (2) Each specimen tested must simulate the cargo compartment sidewall or ceiling liner panel, including any design features, such as joints, lamp assemblies, etc., the failure of which would affect the capability of the liner…