9
PI-121
January 2020
HIGH PRESSURE HOSE
1.
Read General Safety
section prior to connecting high pressure hose.
2. Do not use a high pressure hose with a burst rating less that 2.5 time
the pressure at which it will operate. 40,000 psi operating pressure high
pressure must have a minimum 100,000 psi burst rating.
3. Do not use a high pressure hose that has an unknown burst rating or
manufacturer’s operating pressure rating.
4. Use of a Safety Shroud is strongly recommended for added safety
where hose connects to control gun.
5. Use of hose restraint (whip check) is required at all hose connections,
including connections at fluid end.
6. Always apply wrench to wrench flats when making threaded
connections. Do not apply wrench on the end fitting ferrule (collar).
7. Remove hose from service if:
A. Cover is damaged and reinforcing wires are exposed to rust and
corrosion;
B. Cover is loose, has blisters or bulges;
C. Hose has been crushed or kinked;
D. End fitting shows evidence of damage, slippage, or leakage.
E. Hose has been exposed to pressures greater than 50% of burst
rating; or
F. Hose is three or more years old, regardless of condition.
8. Disconnect, drain, coil and store hose properly after use.
9. Never attempt to repair or recouple high pressure hoses in field. High
pressure hose end fittings are the permanently crimped type and can only
be properly installed with hydraulic crimping equipment.
NOZZLES
1.
Read General Safety
section.
2. Nozzle flow ratings must be compatible with pump discharge and
pump pressure rating. (See Nozzle Flow Rating Chart on page 42.)
3. Use only nozzles with a manufacturer’s pressure rating of at least the
operating pressure or a burst rating or no less than 3.0 times the desired
operating pressure.
4. Prior to installation, make sure the nozzle has no clogged orifices.
5. Apply anti-gall compound to the nozzle threads. DO NOT use Teflon
tape. Check blast nozzle size before installing the nozzle. Make sure the
nozzle orifices are not too small in order to prevent excessive system
pressure when the gun’s control valve trigger/pedal is depressed.