This specification applies to flexible fluoropolymer resin heat-shrinkable extruded tubing made from tetrafluoroethylene resin, copolymer of tetrafluoroethylene and hexafluoropropylene (FEP), and from perfluoroalkoxy (PFA) resin for use as electrical insulation. This specification covers three types of tubings, namely: Type I tubing, normally made by paste extrusion, and Type II and Type III tubings, normally made by melt extrusion. The finished compound shall be free of all foreign matter other than intended formulation additives. The material shall conform to the specified chemical and physical property requirements such as: (1) restricted shrinkage, (2) specific gravity, (3) longitudinal change, (4) tensile modulus at elongation, (5) volume resistivity, (6) dielectric breakdown voltage, (7) heat resistance, (8) low-temperature flexibility, and (9) melting point. The dimensional requirements after unrestrictive shrinkage such as inside diameter, wall thickness, and stock lengths are specified. The sampling and test methods to determine conformance to the specified requirements are given.
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1.1 This specification applies to flexible heat-shrinkable extruded tubing made from tetrafluoroethylene resin, copolymer of tetrafluoroethylene and hexafluoropropylene, and from perfluoroalkoxy resin for use as electrical insulation.
—This standard is similar but not identical to IEC 60684–3–240 to –243.
1.2 The values stated in inch-pound units are to be regarded as the standard except temperature which shall be stated in degrees Celsius. Values in parentheses are for information only.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
D638 Test Method for Tensile Properties of Plastics
D1711 Terminology Relating to Electrical Insulation
D2116 Specification for FEP-Fluorocarbon Molding and Extrusion Materials
D2671 Test Methods for Heat-Shrinkable Tubing for Electrical Use
D3307 Specification for Perfluoroalkoxy (PFA)-Fluorocarbon Resin Molding and Extrusion Materials
D3636 Practice for Sampling and Judging Quality of Solid Electrical Insulating Materials
D4895 Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
E176 Terminology of Fire Standards
electrical insulation; fluoropolymer resin heat-shrinkable tubing; FEP; heat-shrinkable tubing; PFA fluoropolymer ; PTFE;
ICS Number Code 29.035.20 (Plastic and rubber insulating materials); 83.140.10 (Films and sheets)
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