Seven Easy Steps For Selecting The Proper Hose

An effective way to remember hose selection criteria is to remember the word... STAMPED

1. Hose Size

The inside diameter of the hose must be adequate to keep pressure loss to a minimum and avoid damage to the hose due to heat generation or excessive turbulence.

To determine the replacement hose size, read the layline printing on the side of the original hose. If the original hose layline is painted over or worn off, the original hose must be cut and the inside diameter measured for size.

NOTE: Before cutting an original hose assembly, measure the overall assembly length and fitting orientation. These measurements will be required to build the replacement assembly.

2. Temperature

When selecting a replacement assembly, two areas of temperature must be considered. These are fluid temperature and ambient temperature. The hose selected must be capable of withstanding the minimum and maximum temperature seen by the system. Care must be taken when routing near hot manifolds and in extreme cases a Gates HeatGuard™ or a heat shield may be advisable.

3. Application

Determine where or how the replacement hose or assembly is to be used. Most often only a duplicate of the original hose will have to be made. To fulfill the requirements of the application, additional questions may need to be answered, such as:

   Where will hose be used?

   Fluid and/or Ambient Temperature?

   Hose Construction?

   Equipment Type?

   Fluid Compatibility?

   Thread End Connection Type?

   Suction Application?

   Routing Requirements?

   Government and Industry Standards Being Met?

   Unusual Mechanical Loads?

   Minimum Bend Radius?

   Non-Conductive Hose Required?


4. Material to be Conveyed

Some applications require specialised oils or chemicals to be conveyed through the system. Hose selection must assure compatibility of the hose tube, cover, couplings and o-rings with the fluid used. Additional caution must be exercised in hose selection for gaseous applications such as refrigerants and LPG.

5. Pressure

Most important in the hose selection process is knowing system pressure, including pressure spikes. Published working pressures must be equal to or greater than the system pressure. Pressure spikes greater than the published working pressure will shorten hose life and must be taken into consideration. Gates DOES NOT recommend using hoses on applications having pressure spikes greater than published working pressures of the hose. 

6. Ends or Couplings

Identify end connections using Gates coupling templates and measuring tools. 

7. Delivery

Identify how many items and when they need to be supplied. 

• Distributors – Call Gates Customer Service.

• End Users – Call Gates Distributors. 










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