Category: Standards

4 Classification4.1 This specification recognizes that polyethylene plastics are identified primarily on the basis of two characteristics, namely, density and flow rate (previously identified as melt index). The former is the criterion for assignment as to type, the latter for designation as to category. Other attributes important to the user for certain applications are covered…

AHP manufacture testing equipment for stretch-wrap films. Stretch wrap films are highly stretchable plastic films that are wrapped around certain items, as often used in the packaging industry. The main function of the film is to improve it’s loading stability for transportation, storage and contamination protection. Stretch-wrap films are commonly made of PE (LLDPE , VLDPE, PVC ….). Critical…

Apparatus5.1 Free-Fall Drop Test Equipment, conforming to the following requirements:5.1.1 It shall permit the container to be placed, prior to release, in a position that will ensure correct orientation, within 2 degrees upon impact, for flat-face drops or flat drops on ends or sidewalls of cylindrical containers, and within 5° upon impact for other drops,…

5.2 Vertical flame test 5.2.1 A specimen of the finished conduit shall be subjected to five 15-s applications of flame. the period between applications is 15 s. The specimen shall not be acceptable if it: a) Continues to flame longer than 10 s, following the fifth application of the flame: or b) Shows more than…

2 PrincipleA joint assembly as test piece consisting of a PVC-U pipe mounted into a PVC-U socket is subjected, within a specified temperature range, to a specified internal pressure regime for a specified test period whilst the pipe is also subject to an angular deflection in the socket. While under pressure the test piece is…

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…

Hot tack Tester According to GB/T 34445, ASTM F1921 Evaporation Residue Constant Weight Tester According to GBT 5009.60-2003, GB/T 5009.64-2003, GB/T 5009.68-2003, GB/T 5009.69-2008, GB/T 5009.203-2003, and GB/T 9740-2008 Water Vapor Transmission Rate Test System According to ASTM F1249、ISO 15106-2、GB/T 26253、JIS K7129、YBB00092003-2015 Water Vapor Transmission Rate Test System According to ASTM F1249、ISO 15106-2、GB/T 26253、JIS K7129、YBB00092003-2015...

4 Requirements4.1 Approach 1No fog shall be visible after the test has ended in accordance with 5.1.4.4.2 Approach 2No permanent visual condensation shall be permitted in accordance with 5.2.4. 5 Test methods5.1 Approach 15.1.1 PrincipleTest specimens are placed in a chamber that is controlled at (50 ± 3) °C. A lamp is positioned in the…

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…