The test methods in this standard are considered important to characterize polytetrafluoroethylene tubing. They are intended primarily for, but not limited to polytetrafluoroethylene tubing.

Variations in these methods or alternate contemporary methods of measurement may be used 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, 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. Scope

1.1 These test methods cover procedures for testing polytetrafluoroethylene tubing for use as electrical insulation. The procedures appear in the following sections:

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

IEC Standards

ASTM Standards

D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement

D876 Test Methods for Nonrigid Vinyl Chloride Polymer Tubing Used for Electrical Insulation

D1505 Test Method for Density of Plastics by the Density-Gradient Technique

D1711 Terminology Relating to Electrical Insulation

D3418 Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry

D3487 Specification for Mineral Insulating Oil Used in Electrical Apparatus

D4895 Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion

E176 Terminology of Fire Standards

Keywords

ac breakdown voltage; bending effects; inside diameter; melting point; penetration resistance; specific gravity; strain relief (shrinkage); tubes; polytetrafluoroethylene; PTFE; volatile content; wall thickness;

ICS Code

ICS Number Code 29.035.20 (Plastic and rubber insulating materials)

Citing ASTM Standards

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