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)

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.