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ASTM D2671-21

Standard Test Methods for Heat-Shrinkable Tubing for Electrical Use
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ASTM D2671-21

Standard Test Methods for Heat-Shrinkable Tubing for Electrical Use

PUBLISH DATE 2021
PAGES 18
ASTM D2671-21

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

 

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

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.

SDO ASTM: ASTM International
Document Number D2671
Publication Date Jan. 1, 2021
Language en - English
Page Count 18
Revision Level 21
Supercedes
Committee D09.07
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