ASTM C 1147:2014

1.1 This practice covers the preparation and evaluation of joints between two pieces of weldable grades of thermoplastic materials, backed and unbacked, (such as those shown in Table 1 ) up to 2 in. (50 mm) in thickness. TABLE 1 Typical Guide for Hot Gas Welding Temperatures Note 1 - For other welding techniques, consult material and equipment supplier for recommendations. °F (°C) A Recommended Gas Type B HDPE 500-600 (260-316) Nitrogen or Air PP 550-600 (288-316) Nitrogen or Air PVC 500-550 (260-288) Air CPVC 550-660 (288-349) Air PVDF 650-680 (343-360) Nitrogen or Air ECTFE 665-695 (352-368) Nitrogen ETFE 675-710 (357-377) Air FEP 650-725 (343-385) Air PFA 675-750 (357-399) Air MFA 536-554 (280-290) Air A Measured ¹/₄ in. (6 mm) inside weld tip, directly in gas stream. B Inert gas may be used in place of air. 1.2 Since there are numerous new technologies and techniques constantly being developed for plastic welding, there are no profiles and procedures that can be considered as standard for all plastics at various thicknesses. This practice is not intended to define profiles and procedures; however, it is intended to establish methods to evaluate minimum short term weld factors to be achieved by the welder for the respective plastics. 1.3 Weld procedures used for test pieces shall reflect procedures to be used in actual fabrication. 1.4 Welding methods to be used include machine welding, extrusion welding, and hot gas welding. 1.5 This practice can be utilized by relevant certification bodies to assess welder proficiency and qualification. 1.6 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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 - There is no known ISO equivalent to this standard.

83.080.20