This standard provides requirements for qualification for welding thermoplastic materials. It addresses requirements for procedure and performance qualifications. This standard is intended for use where referenced by product or fabrication code, specification, contract document, or internal documents such as quality control or quality assurance manuals. The requirements imposed by the Referencing Document supersede the requirements of this standard.

This standard is intended for use with the following thermo-plastic welding processes:

Socket Fusion Welding (SFW)

Butt Contact Welding (BCW)

Flow Fusion Welding (FFW)

Electrofusion Welding (EFW)

Infrared Welding (IRW)

Hot Gas Welding (HGW)

Speed Welding (WZ)

Fan Welding (WF)

Extrusion Welding (EXW)

This standard is intended for use with new construction but may be applicable for retrofit, reconstruction, or repair procedures. Thermoplastic applications that are bonded to backing materials are not addressed in this standard.

This standard makes use sole use of U.S. Customary Units. Approximate mathematical equivalents in the International System of Units (SI) are provided for comparison in parentheses ( ) or in appropriate columns in tables and figures.