IP-010
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Revision 3
Underwater Installation
WARNING!
When assembling a PLIDCO Clamp+Sleeve product under water (or submerged in any liquid) it is
possible to build up thousands of pounds of pressure in the annulus between the fitting and the pipe.
The pressure is caused by compressing the fluid trapped in the annulus as the two fitting halves are
closed and tightened. The pressure trapped in the annulus may have the following effects:
The pressure rating of the split product is exceeded causing leakage or damage to the fitting.
The pipe on which the fitting is installed is damaged.
Personal injury or death due to subsequent removal of a vent plug.
RECOMMENDATIONS
The Pipe Line Development Company strongly recommends the following for all underwater installations:
1.
Order or procure fittings with vents.
2.
Leave the vents open during installation.
Additionally, the Pipe Line Development Company does not recommend using a lubricant on the seals
or on the stud and nut threads. This is to prevent sand, gravel, or debris from sticking to the lubricant
and possibly interfering with sealing and/or obtaining accurate torque reading on the stud bolts.
