【国外标准】 Standard Specification for Extruded and Compression Molded Rod and Heavy-Walled Tubing Made from Polytetrafluoroethylene (PTFE) (Withdrawn 2018)

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.1.1 This specification is intended to be a means of calling out plastic product used in the fabrication of end items or parts.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 D4894.1.3 This specification covers rod and heavy-walled tubing made wholly from polytetrafluoroethylene and produced in accordance with good commercial practice.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 D7209.1.6 The values stated in inch-pound units are to be regarded as the standard in all property and dimensional tables.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.Note 1—Although this specification and ISO 13000-1 and ISO 13000-2 differ in approach or detail, data obtained using either are technically equivalent.