The hose assembly electrical property grades and electrical resistance limits are defined within EN 16643 and tested in accordance with BS EN ISO 8031. Aflex Hose electrically conductive (EC) assemblies are defined in EN 16643 as electrically bonded and given the symbol M. M-grade assemblies exhibit a maximum electrical resistance of 100Ω between end fittings. Aflex Hose anti-static (AS) PTFE liners and rubber covers are termed static dissipative within EN 16643 and given the symbol Ω followed by letters that specify either the liner, cover or both; L=liner, C=cover, CL= cover & liner. Ω-grade covers or liners exhibit an electrical resistance of 103-108Ω.
The table below identifies each EN 16643 electrical grade for a hose assembly along with a brief description and example assembly configuration.
| EN16643 Electrical Grade For Hose Assembly |
EN16643 Description | Example Hose Assembly |
|---|---|---|
| Grade M | Electrically bonded without static-dissipative lining or cover | CFLN/GP SS SI Ends ASA150 Lined CFLN/GP TO Ends JIC female |
| M/Ω-L | Electrically bonded and static-dissipative lining | CFLN/AS SS SI Ends ASA150 Lined CFLN/AS TO Ends JIC female |
| M/Ω-C | Electrically bonded and static-dissipative cover | CFLN/GP SS RC Ends ASA150 Lined |
| M/Ω-CL | Electrically bonded and static-dissipative cover and lining |
CFLN/AS SS RC |
| I | Electrically insulated (no electrical bonding AND no static-dissipative layers) |
CFLN/GP PB No helix Ends ASA150 Lined |
| Ω-L | Static dissipative lining without electrical bonding | CFLN/AS TO Ends ASA150 Lined CFLN/AS SS Ends ASA150 PP spigot and flange |
| Ω-C | Static dissipative cover without electrical bonding | CFLN/GP SS RC Ends ASA150 PP spigot and flange |
| Ω-CL | Static dissipative cover and lining without electrical bonding | CFLN/AS SS RC Ends ASA150 PP spigot and flange |
