Seepex BN 5-12 Series, Руководство по эксплуатации и техническому обслуживанию

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Proco Exansion Joint O&M Manual 6-15-2011 - 3 -
3.5 B
OLT
T
IGHTENING
R
EQUIREMENTS
:
Once the expansion joint and control rod plates are in place, tighten all bolts gradu-
ally and equally by alternating around the flange. Bolts are not considered tight and
"locked-on" until the edges of the expansion joint flanges bulge slightly. (
Never
tighten bolts on a rubber expansion joint to the point where there is contact between
the retaining ring and pipe flange. This type of tightening will crush the rubber ex-
pansion joint and cause premature failure.)
4.0 OPERATION AND MAINTENANCE PROCEDURES:
4.1 I
NSPECTION
O
F
R
UBBER
E
XPANSION
J
OINT
A
T
S
HUT
D
OWN
:
Rubber expansion joints should be visually inspected at shutdowns. Look for any
signs of cracks in the outer cover that shows exposed fabric reinforcement. If fabric
reinforcement is exposed, it is recommended the expansion joint be replaced.
4.1.1 Expansion joint has been coated with a Hypalon paint to protect against UV
sunlight. Expansion joint will need to be coated with Hypalon paint as condi-
tions require.
4.2 E
XPANSION
J
OINT
B
OLTING
C
HECK
:
Check expansion joint at least one week after start-up to ensure that bolts are tight
on expansion joint and control rod assemblies. As any rubber-like material takes a
"set" after a period of compression, bolts may loosen; thus, resulting in a possible
broken seal between the expansion joint and the mating flange.
Periodically check bolting to make sure bolts are tight. Tighten as necessary.
4.3 S
ERVICE
C
ONDITIONS
:
Make sure the expansion joint operates at the temperature, pressure, vacuum, and
movements match the original requirements. Contact Proco's Customer Service
Department by
phone: 209-943-6088, facsimile: 209-943-2042, or e-mail:
sales@procoproducts.com, if the system requirements exceed those specified.
4.4 D
O
N
OT
I
NSULATE
O
VER
R
UBBER
E
XPANSION
J
OINTS
:
It is suggested not to insulate over a non-metallic expansion joint. If insulation is re-
quired, it should be made removable to permit easy access to the flanges. Remov-
able insulation will facilitate periodic inspection of the expansion joint material and
allow for tightening of expansion joint bolts. (
It should be noted that insulation could
cause restriction of expansion joint movement and/or over-temperature of rubber
material.)
4.5 W
ELDING
N
EAR
A R
UBBER
E
XPANSION
J
OINT
:
Take precautions when welding next to an expansion joint. Weld spatter can dam-
age rubber material, thus, decreasing overall performance during operation. If weld-
ing near a rubber expansion joint, it is suggested that a welding blanket be used to
protect against damage.
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