Significance and 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.
Scope
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)
Test
Method(s)
Adhesive Peel Strength
94 – 100
Brittleness Temperature
40
D746
Color
55 and 56
D1535
Color Stability
57 – 62
D1535
Conditioning
7
D618
Copper Stability
89
Corrosion Testing
85 – 91
Dielectric Breakdown
20 – 25
D149
Dimensions
8 – 13
D876
Flammability
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
D882
Storage Life
31 – 35
Specific Gravity
69 and 70
D792
Stress Modulus
81 – 84
D412
Tensile Strength and Ultimate Elongation
44 – 48
D412
Thermal Endurance
92 and 93
Volume Resistivity
71 – 74
D257
Water Absorption
75 and 76
D570
Melting Point
100 – 104
D3418
1.3 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.