Page 23 - NovaFlex_MarineBroch (Page 1)

General Instructions for
Hose Hydrostatic Testing and Inspection
(Information obtained from RMA Hose handbook IP-2 [1987])
Hydrostatic testing is the recommended practice to verify hose serviceability. The hose
user must determine when testing is not practicable and implement the best alternative,
a visual inspection. A visual inspection of hose as described previously should be made
for loose cover, kinks, bulges, soft spots, cover hardness and/or cracks which indicate
conditions that require hose to be replaced. In addition the attachment method (clamps
or couplings) should be closely examined for damage or movement.
When periodic inspection includes a hydrostatic test, pressure the hose assembly for
one minute at 150% of the recommended working pressure of the hose. During the
hydrostatic test, the hose should be straight, not coiled or in a kinked position. Water is
the usual test medium . Never exceed working pressure (25% of the rated burst
pressure).
Safety Warning:
Before conducting any pressure tests on hose, provisions must be taken to ensure the
safety of personnel performing the test and to prevent any possible damage to property.
Only trained personnel using proper tools and procedures should conduct any pressure
test.
1 Air or other compressed gases should not be used for pressure testing.
2 All air should be removed from the hose prior to testing by bleeding it through an
outlet valve attached to one end of the hose.
3 Hose to be pressure tested should be restrained by placing steel rods or strap
close to each end and at approximate 10 foot intervals along its length to keep the
hose from “whipping” if failure occurs. The steel rods or straps are to be firmly
anchored to the test structure in such a manner that they do not restrict the
movement of the hose under pressure.
4 The outlet ends of the hose should be placed so that an ejected
fitting will be restrained by a wall, sand bags, etc.
5 Provision must be made to protect personnel from the forces of the pressure
media if a failure occurs. Personnel must never stand in front or in back of hose
ends during test.
7. Inspect couplings & clamps for any
worn parts that may prevent
normal function, damage to any
safety device that prevents them
from working, worn threads,
excessive corrosion or rust, or
cracks in any part of the coupling
or clamp.
Remove hose from service. If
possible remove suspect couplings
from the hose, replace with new
coupling.
8 Inspect for hardness of the hose
cover. Hoses older that 5 years
may start to develop cover
hardness and crack over time
permitting moisture in to the
reinforcement.
Replace with new hose.
INSPECT FOR: CORRECTIVE ACTION
NovaFlex 8
General instru
proper hose
(Information obtained from RMA Ho
Hose products in storage can be affecte
humidity, ozone, sunlight, oils, solvents,
insects, rodents and radioactive materia
The appropriate method for storing hose
its size (diameter and length), the quant
which it is packaged. Hose should not b
extent that the weight of the stack cre
lengths stored at the bottom(plastic h
this on hot days).
Since hose products vary considerably
not practical to establish definite recomm
having a very light wall will not support a
a heavier wall or hose having a wire rein
coils or bales should be stored so that th
plane.
Whenever feasible, hose products shou
shipping containers, especially when su
crates or cardboard cartons which provi
deteriorating effects of oil, solvents and
containers also afford some protection a
Certain rodents and insects will damage
elements should be provided.
The ideal temperature for storage of ho
50° – 75°F(10°-24°C) with a maximum o
32°F (0°C) some products will become s
before bending or being put in service.
stored near sources of heat, such as rad
they be stored under conditions of high
To avoid the effect of ozone, hose shou
equipment that may generate ozone. Di
throu gh windows should be avoided. Flo
create l ight waves harmful to hose. Prot
be provided.
Items should always be stored on a first
the best of conditi ons, unusually long sh
rubber hose.