Description / Abstract: Introduction

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose. This standard covers the material requirements of fuel filler and fuel filler vent hoses (coupled or uncoupled), for use with gasoline fuel in automotive fuel systems.

Note: Fuel filler hoses for diesel and biodiesel applications are specified in GMW15605.

For use in non-conductive environments, all layers of the hose must be non-conductive. Conductivity or nonconductivity of filler hose constructions A, B, C, I, J and K must be specified on part drawing. Filler hose constructions D, E, F, G and H are conductive, and must meet the conductivity requirements of Appendix A, Table A2.

The material content of the hose, permeability and stiffness of the hose are defined by the Construction and Reinforcement designations for the hose. The Construction and Reinforcement designations for the hose together define the “Type” for the hose. Hoses of construction A, B, C, F, G and H are suitable for applications subjected to maximum continuous operation temperatures of +90 °C with intermittent operation at temperatures up to +110 °C maximum. Hoses of construction D, E J and K are suitable for applications subjected to maximum continuous operating temperatures of +100 °C with intermittent operation at temperatures up to +125 °C maximum. Hoses of construction I are suitable for applications subjected to maximum continuous operating temperatures of +125 °C with intermittent operation at temperatures up to +150 °C maximum. In general, lower fuel permeating hose constructions result in stiffer and less flexible hoses.

Applicability. Fuel filler and fuel filler vent hoses (coupled or uncoupled), for use with gasoline fuel in automotive fuel systems.

Remarks.

Classification. Materials covered by this standard are divided into several sets of constructions and reinforcement categories. The hose is defined as “GMW15349 Type XY”, where “X” refers to the construction of the hose and the “Y” refers to the reinforcement of the hose.

Construction. The “Construction” defines the material content and construction of the hose. The following materials are used in the various constructions:

• Tetrafluoroethylene hexafluoropropylene (THV)

• Fluorocarbon thermoplastic vulcanizate (FTPV)

• Epichlorohydrin/ethylene oxide copolymer (ECO)

• Fluoroelastomer (FKM)

• Butadiene/Acrylonitrile copolymer (NBR)

• Chlorinated Polyethylene (CPE or CM)

• Chlorosulfonated Polyethylene (CSM)

• Polyvinylchloride polymer (PVC)

• Ethylene tetrafluoroethylene (ETFE)

The thickness of the barrier layer shall be sufficient to meet the permeation requirements of the respective construction. The descriptions of the constructions of hose used for this application are listed in Appendix B, Table B1.

Reinforcement. The reinforcement of the hose describes the type of fiber used in the hose. Reinforcement to the tube of the hose may be applied by braiding, knitting or circular weaving. The reinforcement is placed between the laminated tube and the cover of the hose.

Reinforcement 1. This reinforcement type consists of aramid fiber.

Reinforcement 2. This reinforcement type consists of rayon fiber.

Reinforcement 3. This reinforcement type consists of no fiber or other material added to the hose constructions.