11
PI-123
January 2022
4.
Never use a lance which is kinked, worn, frayed
or whose abilities
to hold pressure is questionable.
5. Do not
use a lance which has damaged or missing threads.
6. Clearance
between lance and tube deposits
must be sufficient
to
allow unrestricted backflow of water and debris. With tubes containing
hard deposits this clearance should be 1/8”
minimum
on the diameter
(or 1/16” per side) of the lance. With tubes containing soft, pliable
deposits this clearance should be greater.
Insufficient side clearance
may cause lance to blow back toward operator.
7.
Serious injury may occur should a lance with live
nozzle exit tube. Use anti-withdrawal device to prevent lance from
exiting tube unexpectedly.
8. The following
JETSTREAM
lance accessories are
strongly
recommended
for safer lance operation:
A. Lance Strain Relief
-
Helps prevent lance inlet end fitting failure.
B. Lance Stinger
- Affords the operator greater control of nozzle.
Establishes a “safety zone” so operator knows when nozzle is about
to exit tube; will eliminate possibility of nozzle and lance “double
back” toward operator within large diameter pipe.
C.
Anti-withdrawal device
prevents the lance from exiting the tube
or pipe. Contact JETSTREAM for additional information regarding
these products.
9. Use only nozzles designed for use with flex lances
(i.e. nozzle
drilled with sufficient rearward orifices so nozzle pulls lance through
tube.)
10. If lance end fittings do not have wrench flats, use properly adjusted
smooth jaw plier wrench (JS PN 64119) to connect lance to pressure
source and nozzle onto lance. Apply wrench on lance and fitting
directly
behind end fitting thread (not on fitting ferrule or collar)
when
installing nozzle on lance. Do not clamp on the lance hose itself with
vise when installing nozzle.
11. Avoid rough handling, stretching or straining of lance.
12. Never attempt to “ramrod” flex lance through blockages or to repair
or recouple lances.
13. After use, drain, coil and store lance properly. Be sure safety tags
remain intact.
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