Installation and maintenance of plastic lined pipework should be performed by trained personnel only. The following procedures supplement standard piping procedure and practices.Flange covers should not be removed until flanges are ready to be bolted into position, otherwise sealing faces may become damaged or distorted. If covers are removed for inspection purposes, they must be replaced immediately afterwards. They should also be fitted to any pipework removed from a system.Gaskets are not required except where the Fluoroline is connected to a flange face of another material, such as glass, carbon, ceramic, reinforced plastic, etc.Bolt should be tightened using proper bolt torques. The torque valves given in the table apply to lined pipes & fittings with class 150 and class 300 flanges.Threads must be clean and well lubricated and washer should be used to ensure correct torque. Bolts should be tightened alternately and evenly.

If flange leak occurs and the bolts of the leaking side have been torqued, they shouldnot be tightened further otherwise permanent damage to the sealing face may result. instead, the bolts on the opposite side should be loosened a half turn at a time, and then the bolts on the leaking side should be tightened by the same amount. If the leak persist, the bolts should be removed and the sealing faces examined for scratches or dents across an entire face which could produce a leak path. Any scratches or dents not exceeding 10% of the liner thickness may be eliminated by hand polishing with fine abrasive cloth or paper.If leakage occurs after the system has been cycled to an elevated temperature and back to ambinet temperature, bolts should be re-torqued after the cool down period. No further tightening would be necessar.No welding, brazing, soldering or flame cutting, which can permanently damage the plastic liner, should be done close to the metal housing, unless adequate precautions are taken to prevent them being exposed to excessive heat.Safety vent holes should not be plugged with paint, cement, etc. The vent holes are essential to release gases which may be generated at elevated temperature and trapped between liner and housing. If not vented, these gases may collapse the liner. vent holes serve to warn of any accidental damage to liner before leakage reaches dangerous proportions.

Smooth metal guides, 0.03" to 0.06", may be used to facilited sliding the sealing faces into position when final connection or installing individual section into an existing line.BOLTS MUST NOT BE LOOSENED WHILE A SYSTEM IS MORE THAN 15DEG C. ABOVE AMBIENT TEMPERATURE, OTHERWISE FLARE DISTORTION OR LINER PULL IN MAY OCCUR .Storges of the pipework shold be under cover, protected from rain, and placed to avoide risk of flooding.To secure the sealing faces and protect them from damage while not in use, flange covers or blind flangers should be installed immediately on all piping items which are removed from a system.The information contained here in is provides only as a guide for the installation and maintenanc e of HORIZON products and it does not constitute and express warranty of any kind.

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