Studies reveal best installation, coatings for desert gathering lines

Kamal M. Morsi Abu Dhabi National Oil Co. U.A.E. Magnetic induction coils preheat the field joint to 240° C. in a process required for the powder-spray application of a primer coat of FBE and an adhesive layer. [10,534 bytes] The circumferential seam between the factory-applied polypropylene pipe coating and the field-joint polypropylene wrapping is plastic-welded with a mechanical assembly to rotate the hot-air welding head around the pipe. [6,959 bytes] The flame-spray technique involves spraying the FBE-coated field joint with small molten drops of polypropylene. This sprayed powdered polypropylene passes through a well-controlled propane flame. For greater ...

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