Active Standard ASTM D6457 | Developed by Subcommittee: D20.15
Book of Standards Volume: 08.03
Historical (view previous versions of standard)
This specification covers the requirements for extruded- and compression-molded rod and heavy-walled tubing made from polytetrafluoroethylene (PTFE). Material covered by this specification is classified according to type (unfilled PTFE or other PTFE), grade (Grades 1 and 2, differentiated by means of the raw material used), and class (Class 1, 2, or 3, based on property requirements). The type, grade, and class may be further differentiated according to dimensional stability and internal defect requirements. The rod and heavy-walled tubing shall be manufactured from PTFE or recycled plastics in accordance with good commercial practice, with the color, finish, and internal defects of the PTFE products in conformity with the requirements specified. Visual inspection, examination for internal defects, and tests for specific gravity, tensile strength, elongation, dielectric strength, and melting point shall be performed and shall conform to the requirements specified.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.2 This specification covers requirements and test methods for the material, dimensions, and workmanship, and the properties of extruded- and compression-molded rod, and heavy-walled tube manufactured from granular unfilled PTFE resin in accordance with Specification D4894.
1.4 The properties included in this specification are those required for the compositions covered. Requirements necessary to identify particular characteristics important to specialized applications are described by using the classification system given in Section 4.
1.5 This specification allows for the use of recycled plastics as defined in Guide D7209.
1.7 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D374 Test Methods for Thickness of Solid Electrical Insulation
D638 Test Method for Tensile Properties of Plastics
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
D1708 Test Method for Tensile Properties of Plastics by Use of Microtensile Specimens
D3892 Practice for Packaging/Packing of Plastics
D4000 Classification System for Specifying Plastic Materials
D4591 Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
D4894 Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
D7209 Guide for Waste Reduction, Resource Recovery, and Use of Recycled Polymeric Materials and Products
E94 Guide for Radiographic Examination
ISO StandardISO13000-2 Plastics--Polytetrafluoroethylene (PTFE) Semi-Finished Products--Part II: Preparation of Test Specimens and Determination of Properties
ICS Number Code 83.140.30 (Plastic pipes and fittings for non-fluid use)