Home / Resources & Training / Tips of the Trade / Eliminating All "Whip" Hoses in Use Today Eliminating All "Whip" Hoses in Use Today Posted in Abrasive & Water Blasting Tip: #83 3/ 4" and 1" I.D. "whip" hoses are most often the cause of the largest pressure drops in the ENTIRE Blast Cleaning SYSTEM. If you think we've lost our mind, read on! Whip hoses are very often used to give the operator a light weight and flexible hose next to the blast nozzle for comfort and to make it easier to bend the hose to get into difficult to access areas. The pressure loss created by choking down the flow of compressed air and abrasive with the smaller size hose reduces the blast nozzle pressure by as much as 10 PSI when using a 10" (3m) length of 3/4" (19mm) or 7 PSI when using a 1" (25mm) ID whip 10" (3m) long. These losses are based on the use of a 3/8" (9.5mm) orifice blast nozzle. The question is not the need for a flexible or a light weight hose for the blaster to carry during a long blasting project but a smaller ID whip hose is no longer the only choice for blasters. Average blasting enviroment. Instead of reducing the ID of the hose near the blast nozzle, use the new 1¼" ID SupFlex hose right up to the blast nozzle holder. This eliminates the reduction in size of the blast hose, will give even more flexibility than the present whip hoses, but will hold the pressure drop to the absolute minimum. For every CFM of pressure loss you have between the air compressor and blast nozzle, the efficiency of the entire blast cleaning operation is reduced by 1½%. If you eliminate a 10 PSI loss by using 1¼" (32mm) ID SupaFlex hose instead of a 3/4" (19mm) regular whip, there is the 15% we promised you. Even if you are using a 1" ID whip hose, we will reduce the pressure drop by about 7 PSI, which is a 10% efficiency increase by using SupaFlex hose. The calculations are based on your using a 3/8" (9.5mm) long venturi style blast nozzle and 10" (3m) of 3/4" (19mm) or 1" ID whip hose. If you are using longer whips, 16" (5m), 25" (7.5m) or even 50" (15m) whip hoses, your savings will be even greater. Meter for meter, the 2-PLY SUPA hose is just slightly heavier than 3/4" (19mm) ID regular blast hoses, but is about 30% lighter than either type of 1" (25mm) ID This ought to keep the blast operator happy. When you start to plan the blast hose type, length and ID size, you should use the same principles of distribution used by water and gas companies when they plan lines into a new sub-division. They will start out with perhaps a 16" (40cm) line, run it for a couple of kilometers, reduce it down to 12" (30cm) for a couple of kilometers, then down to 8" (20cm) or 10" (25cm) to keep the volume and pressure high even to the last lot. We need to use the same ideas in planning the blast hose sizes. If you will be working within a 50" (15m) to 100" (30m) radius of the blast machine, and will use a 3/8" (19mm) long venturi blast nozzle, 1¼" (32mm) ID blast hose should be used, with NO whip. If you will be working beyond 100" (30m) and for some reason cannot locate your air compressor and/or blast machine closer to the work area, use 1½" (38mm) ID as your "feeder" hose to within 50" (15m) of the work area and then reduce to 1¼" (32mm) ID SupaFlex hose to the blast nozzle. This planned blast hose SYSTEM will give you the least possible pressure drops. All the above is based on your work area being no higher than 25" (7.5m) above ground, which we will cover in a later tip. Tip: #83 Share this Download pdf Related Links > What Size Whip Hose Should be Used with a 7/16" nozzle?