Page 311 - GoodyearEPIndustrialHose

APPENDIX c
Air &
Multipurpose
General Purpose
Heavy Duty
Push-on
Chemical
Transfer
Cleaning
Equipment
Food
Transfer
Washdown
Marine
Material
Handling
Abrasives
Bulk Transfer
Cement & Concrete
Mining
Petroleum
Aircraft Fueling
Dispensing
Dock
Transfer
Spray
Steam
Vacuum
Veyance
Water
Discharge
Suction &
Discharge
Washdown
Welding
Coupling
Systems
APPENDIX
309
ELECTRICAL RESISTANCE TESTS
FOR HOSE AND HOSE ASSEMBLIES (continued)
GENERAL INFORMATION
11.0 Procedure for hose assemblies fitted with metal end fittings:
When it is required that the resistance of a hose assembly be measured, the leads of the test instrument shall be attached
directly to the metal hose shank (threaded end connection, fixed flange, stub end of a floating flange, etc.) of the metal
end fittings.
Some hoses, especially thermoplastic hoses, have conductive layers within the hose construction. These hoses shall be tested
as assemblies made with fittings and assembly techniques specified by the hose and fitting manufacturer.
Apply the metal contacts to the metal end fittings.
Apply the test voltage (9V) and measure the resistance 5 seconds ± 1 second after the voltage is applied.
12.0 Procedure for measurement of electrical continuity:
In certain types of hose constructions, electrical continuity is provided between the end fittings by means of a continuous wire
or wires bonded to each coupling. When the construction is such that there are internal and external wires, the electrical
continuity of both wires shall be established.
It is essential that contact resistance between the end fittings and the ohmmeter be minimized.
Apply the metal contacts to the metal end fittings.
Apply the test voltage (9V) and measure the resistance 5 seconds ± 1 second after the voltage is applied.
Figure 6-2 – Nail or “Pot Room” Test