【国外标准】 Standard Test Methods for Heat-Shrinkable Tubing for Electrical Use

4.1 These test methods include most of the important tests used to characterize heat-shrinkable tubing. They are intended primarily for, but not limited to, extruded heat-shrinkable tubing.4.2 It is acceptable to use variations in these test methods or alternate contemporary methods of measurement to determine the values for the properties in this standard provided such methods ensure quality levels and measurement accuracy equal to or better than those prescribed herein. It is the responsibility of the organizations using alternate test methods to be able to demonstrate this condition. In cases of dispute, the methods specified herein shall be used.NOTE 2: Provision for alternate methods is necessary because of (1) the desire to simplify procedures for specific applications without altering the result, and (2) the desire to eliminate redundant testing and use data generated during manufacturing process control, including that generated under Statistical Process Control (SPC) conditions, using equipment and methods other than those specified herein. An example would be the use of laser micrometers or optical comparators to measure dimensions.1.1 These test methods cover the testing of heat-shrinkable tubing used for electrical insulation. Materials used include poly(vinyl chloride), polyolefins, fluorocarbon polymers, silicone rubber, and other plastic or elastomeric compounds.1.2 These test methods appear in the following sections:Procedure Section(s) TestMethod(s)Adhesive Peel Strength 94 – 100  Brittleness Temperature 40 D746Color 55 and 56 D1535Color Stability 57 – 62 D1535Conditioning 7 D618Copper Stability 89  Corrosion Testing 85 – 91  Dielectric Breakdown 20 – 25 D149Dimensions 8 – 13 D876Flammability 68 D8355(Methods A, C, or D)Fluid Resistance 63 – 67  Fungus Resistance 100 – 104  Heat Resistance 49 – 54  Heat Shock 26 – 30  Low-temperature Properties 36 – 43  Restricted Shrinkage 14 – 19  Selection of Test Specimens 6  Secant Modulus 77 – 80 D882Storage Life 31 – 35  Specific Gravity 69 and 70 D792Stress Modulus 81 – 84 D412Tensile Strength and Ultimate Elongation 44 – 48 D412Thermal Endurance 92 and 93  Volume Resistivity 71 – 74 D257Water Absorption 75 and 76 D570Melting Point 100 – 104 D34181.3 The values stated in inch-pound units are to be regarded as standard, except for temperature, which shall be expressed in degrees Celsius. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 5 and for fire test safety caveats see Test Methods D8355.NOTE 1: These test methods are similar, but not identical to, those in IEC 60684-2 (see also Note 9).1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.