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                POLYURETHANE FOAM (PUF) THERMAL                                                INSULATION COATING                             

PUF thermal insulation coating designed for offshore flow assurance is critical to the oil and gas industry to reduce heat loss and prevent hydrate formation for oil pipelines and helps to maintain viscosity in hot oil pipelines.

The coating system is a polyurethane-based insulation coating composed of three functional components: a FBE primer, a layer of polyurethane foam and an outer layer of high density polyethylene/polypropylene to provide excellent corrosion protection, superior insulation and mechanical protection for oil pipelines at operating temperatures up to 150oC.

Capability/Property  
Minimum Pipe Diameter  ……………………………………....… 100 mm (4”)
Maximum Pipe Diameter ………………………………………… 600 mm (24”)
Minimum Operating Temperature  …………………………….... -20°C (-4°F)
Maximum Operating Temperature  ……………………………… 140°C (284°F)
Minimum Pipe Length  ………………………………………........ 9.5 m
Maximum Pipe Length  …………………………………………... 12.7 m
OHTC (“U” Value) ……………………………………………...… <2.0 W/m2.K (0.352 BTU/hr.ft2.F)
Maximum Water Depth  …………………………………….....… 300 m
K-Value ………………………………………………................... <0.042 W/m.K



 

         MULTILAYER POLYPROPYLENE (PUF)      
INSULATION COATING

Multilayer Polypropylene (MLPP) Insulation Coating is a technologically advanced coating system for offshore flow assurance. MLPP Insulation Coating can be designed and manufactured to provide excellent insulation in subsea pipelines with operating temperatures up to 150°C (302°F) and depths of up to 3000 m (9842’).
In MLPP thermal insulation coating, 3LPP coated pipe is conveyed through infrared heating system for outer layer fusion and improving adhesion between preceding and successive layers. Hot PP Foam is extruded onto the heated 3LPP coated pipe. Then the pipe is cooled down by quenching system. This step will be repeated as many times as necessary to achieve the desired thermal insulation requirements.Following the final polypropylene foam coating application, a final single layer of UV stabilized polypropylene topcoat is applied by extrusion process over the polypropylene foam.
 
Capability/Property  
Minimum Pipe Diameter…………………………………………..... 100 mm (4”)
Maximum Pipe Diameter …………………………………………… 600 mm (24”)
Minimum Operating Temperature………………………………..... -35°C (-31°F)
Maximum Operating Temperature ………………………………… 150°C (302°F)
Minimum Pipe Length …………………………………………….... 9.5 m
Maximum Pipe Length ……………………………………………... 12.7 m
OHTC (“U”Value)…………………………………………………... <1.5W/m2.K (0.264 BTU/hr.ft2.F)
Maximum Water Depth …………………………………................ 3000 m

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