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3.
Inspect the flange bolts. Defective flange bolts can be replaced with PLIDCO Inject-a-Bolts. Studs
should only be replaced one bolt at a time, and that bolt should be tightened to its specified torque
before changing another bolt.
4.
Make sure the gap between the flanges is open to the flange stud bolts (shown in Figure 2). This
will ensure injected sealant can reach the stud bolts. For flat face or insulating flanges, contact
PLIDCO.
5.
Clean and lubricate all PLIDCO Flange+Repair Ring studs and nuts. Ensure the nuts are free and
easy running prior to installation.
6.
Coat all exposed surfaces of the seals with a lubricant. The surfaces of the flanges can be lightly
lubricated as well to prevent any frictional drag.
recommended and the maximum temperature limit for the various seals. The customer must
determine if the lubricant is compatible with the product in the pipeline.
Petroleum based lubricants
Silicone based lubricants
Glycerin based lubricants
Super Lube® Grease (1)
Buna-N
Viton
Silicone
Neoprene
Aflas
Hycar
1.) Super Lube® Grease is a product of Synco Chemical
Corporation. (www.super-lube.com)
2.) Temperature limit is for the seal material only and does not
imply the pressure rating is necessarily applicable at this limit.
Figure 2
Table 1 below lists the lubricants that are
= A
= B
= C
= D
A, B, C, D
A, B, C, D
C, D
B, C, D
A, B, C, D
A, B, C, D
Table 1
Page 3 of 12
Temperature (2)
225°F (107°C)
250°F (121°C)
300°F (149°C)
250°F (121°C)
225°F (107°C)
180°F (82°C)
IP-008
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