General Information
Figure 6-2 – Nail or “Pot Room” Test
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.
Electrical Resistance Tests
for Hose and Hose Assemblies
(
continued)
331
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
LPG Delivery
Water
Discharge
Suction & Discharge
Washdown
Welding
Coupling Systems
Equipment
Appendix