This standard covers requirements for extruded single and multilayered lines used in fuel, vapor and evaporative emissions. The vapor and evaporative emission lines covered by this specification can either be straight or convoluted. Operating temperatures for lines covered by this specification range from (-40 to +90) °C with excursions to +115 °C. Other documents which describe the performance and dimensional requirements of these components and assemblies manufactured from these components are GMW14681, GM9060P, GM9080P, and GM9676P.

In addition to the test requirements listed in this specification, additional fuel recirculation and/or permeation testing may be required for validation of the tubing and/or quick-connectors used in the fuel line assembly. Any additional requirements shall be defined by the GM Materials Engineer.

Material Description. Each material shall be defined by a construction and a grade. See paragraph 3.2.

Typical Applications. Thermoplastic fuel lines, evaporation- and purge lines.