The fitting/coupling and attachment names above link to the Campbell catalog sections where more detailed information on those products can be found.

Hose Assemblies vs. Hose Systems
There are three components of any hose assembly or hose system: 1) The coupling or fitting; 2) The hose; and 3) The attachment method. Each component plays a critical role in determining the working pressure of the end product. Only when all the components are considered can a usable pressure rating be determined.

A Hose Assembly is a collection of components using attachments, such as band clamps or bolt clamps.

A Hose System uses Campbell’s integrated-designed fittings, couplings, ferrules, sleeves, or U-bolt clamps and is assembled using Campbell crimping procedures and specifications. A hose system is repeatable, measurable, and performance-oriented.

All Campbell pressure ratings are verified by extensive hydrostatic burst testing with hoses to ASTM D380 standards. Test results for specific hoses can be provided upon request.

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The Safety Factor
The RMA requires that hose working pressures include a safety factor commensurate with their intended application. Most hoses are required to meet a 4x safety factor, except the following: Water hose rated under 150 PSI requires a 3x safety factor; Steam hose requires a 10x safety factor; and hose conveying gas in a liquid state requires a 5x safety factor. (For example: a 150 PSI-rated air hose has a 4x safety factor and must be successfully tested to a minimum of 600 PSI.)

Campbell’s fitting and coupling pressure ratings match the RMA safety factor requirements with most hoses. Due to the wide variety of industrial hoses, as well as variations in design, construction, and material, we cannot guarantee that our pressure ratings meet the safety factor requirement with every hose. If you have any questions about pressure ratings, please contact Campbell Fittings.

Never exceed the working pressure of the lowest rated component in the hose system. Maximum working pressure includes the highest pressure the system will experience, such as spikes, surges, and water hammer effects. (For example: If a system consists of a hose rated to 150 PSI and the couplings are rated to 500 PSI, the system should never be used in excess of 150 PSI.)

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Footnotes
1) For normal fluids (not hazardous, combustible, flammable, volatile, corrosive, ammonia or LPG). Individual testing should be employed for non-normal fluids to ensure capability. Pressures shown are only valid for the fitting/coupling/attachment and hose combinations indicated and for their threaded mating parts. System working pressure is limited to the lower of the attachment working pressure or the hose working pressure. Does not include end pull forces. Not for plastic fittings/couplings. All hose systems must be assembled using Campbell procedures and crimp specifications. See elevated temperature derating chart above. Consult factory for reduced temperatures.

2) Hose Descriptions
AIR: Any smooth bore rubber air or water hose. Includes most general purpose hose.
CHEMICAL: Any smooth bore rubber chemical hose, including plastic lined (PTFE, UHMW, XLPE). Does not include soft tube hose.
PVC: Any smooth bore PVC or vinyl hose.
RUBBER: Any smooth bore rubber hose except steam, hot tar & asphalt, chemical, and soft tube hose.
SOFT: Any smooth bore rubber hose with a thick, soft tube. Usually gum rubber and some food-grade hose.
STEAM: Includes hot tar and asphalt.

3) Due to limitations with flanges, consult factory for temperatures other than 70°F.

4) Campbell COBRA Cam & Groove Couplings are identified by the name “Campbell” on the body, by the ferrule interlock groove, and by the part number, which includes a “C” suffix. Not for air or gas service.

5) Maximum temperature 160°F.

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