ASTM D2671-21 PDF

Full title and description

Standard Test Methods for Heat-Shrinkable Tubing for Electrical Use — designation ASTM D2671-21. This standard compiles the test methods commonly used to characterize extruded and other heat-shrinkable tubing intended for electrical insulation, including dimensional, mechanical, thermal, electrical, and environmental tests used for product specification and quality control.

Abstract

ASTM D2671-21 specifies standardized test procedures for evaluating heat-shrinkable tubing used as electrical insulation. It covers tests for shrinkage, tensile and modulus properties, heat and low-temperature resistance, dielectric properties, fluid and fungus resistance, flammability, adhesive performance, and other properties needed to assess suitability for electrical applications. The methods are intended to support material characterization, production control, and comparative evaluation of tubing products.

General information

• Status: Active standard (current designation D2671-21).
• Publication date: 2021 (designation year 2021; document updated Feb 19, 2021).
• Publisher: ASTM International.
• ICS / categories: ICS 29.120.99 (electrical insulating materials / related testing); alternative ICS listing found as 29.035.20 in some catalogues.
• Edition / version: D2671-21 (2021 edition).
• Number of pages: 18 pages.

Summary details (status, date, pages, ICS, DOI) and ordering information are published in the ASTM catalog and standards aggregates.

Scope

These test methods cover testing of heat-shrinkable tubing used for electrical insulation. Materials addressed include poly(vinyl chloride), polyolefins, fluorocarbon polymers, silicone rubber, and other plastic or elastomeric compounds. The standard lists procedures for specimen selection and a broad set of physical, mechanical, thermal, electrical, and environmental tests to determine properties necessary for electrical use and specification.

Key topics and requirements

• Restricted (radial) shrinkage and longitudinal change — procedures to measure shrink performance.
• Tensile strength, ultimate elongation, secant and stress modulus (ASTM D412/D882 references where applicable).
• Heat resistance, heat shock, thermal endurance and temperature-index testing.
• Low-temperature flexibility and brittleness temperature assessments.
• Dielectric breakdown/strength and volume resistivity measurements (references to D149 and D257 where applicable).
• Flammability test methods and flame resistance requirements (methods A, C, or D referenced).
• Fluid resistance, water absorption, and copper-corrosion testing.
• Adhesive peel strength and adhesive performance for lined (adhesive) tubing.
• Color and color stability evaluations; specimen conditioning and selection procedures.
• Storage life and stability, and fungus resistance testing.

These topics represent the principal tests and property evaluations specified for product specification, acceptance testing, and comparative material assessment.

Typical use and users

Typical users include cable and heat‑shrink tubing manufacturers, material suppliers, test laboratories, OEMs specifying electrical insulation, product qualification teams, quality control engineers, and standards writers. The standard is used to develop product specifications, to perform incoming and final inspection testing, and to provide a common basis for comparison between materials and products.

Related standards

ASTM D2671 references and cross‑references multiple ASTM test methods used within its procedures, including (but not limited to) ASTM D149 (dielectric strength), D412 (tension/tensile), D570 (water absorption), D792 (specific gravity), D257 (volume resistivity), D882 (secant modulus), D1535 (color), D746 (brittleness temperature), and D8355 (flammability methods). Other referenced interlaboratory reports and precision statements are available for specific test methods tied to D2671.

Keywords

heat‑shrinkable tubing, heat‑shrink tubing, tubing test methods, electrical insulation, restricted shrinkage, tensile strength, dielectric strength, volume resistivity, heat shock, thermal endurance, specific gravity, water absorption, adhesive peel strength, copper corrosion, flammability.

FAQ

Q: What is this standard?

A: ASTM D2671-21 is a collection of standardized test methods for evaluating heat‑shrinkable tubing intended for electrical use, covering dimensional, mechanical, thermal, electrical and environmental tests.

Q: What does it cover?

A: It covers specimen selection and procedures for measuring shrinkage, tensile properties, modulus, heat and cold performance, dielectric properties, flammability, fluid and fungus resistance, adhesive performance, and related properties required for specifying and qualifying heat‑shrink tubing.

Q: Who typically uses it?

A: Manufacturers, material suppliers, test laboratories, OEMs, product qualification and QC engineers, and standards committees use D2671 to develop specifications, perform acceptance testing, and compare products.

Q: Is it current or superseded?

A: Designated D2671-21, this is the 2021 edition and is listed as active (current) in ASTM’s catalog and related standards aggregators (document updated Feb 19, 2021). Users should confirm the active status before procurement or technical referencing in case of later revisions.

Q: Is it part of a series?

A: D2671 is a single standard consisting of a set of test methods; however, it cross‑references and relies on numerous other ASTM test methods (for example D149, D412, D257, D570, D882, D1535, D746, etc.) which together form the test-method ecosystem for electrical insulating materials.

Q: What are the key keywords?

A: heat‑shrinkable tubing, restricted shrinkage, dielectric strength, tensile strength, thermal endurance, heat shock, water absorption, adhesive peel strength, copper corrosion, flammability.