عربي

Cold Insulation

PUF

- Fabrication of metal jacket according to specification.
- Making a longitudinal and circumference seam to Aluminum metal jacket, which shall be applied to ensure a tight fit over the insulation and to prevent any lifting of the lapping edge at the longitudinal seam. All longitudinal seams shall be staggered on alternative side of the pipe and laps shall be located to give maximum protection from wind and rain.
- metal jacket (Aluminum , St.St. ) sheets shall be overlapped male to female in order to increase the rigidity.
- Making Pre. Foam spacer ( insulation thickness ) between the metal jacket and the body to be insulated using preformed foam.
- Installation of (Aluminum , St.St.) on the pipelines and equipmrnts to be insulated.
- The metal shall be cut sufficient length to provide a minimum 50mm lap at the longitudinal seam.
- The jacket shall be applied with a minimum circumferential lap of 50mm.
- The insulation for pipe elbows shall be fabricated from mitred segment of the straight pipe sectional insulation, cut to conform to the radius of the Elbow. The proper number of mitres is required on an Elbow so as provide a good closure. A general guide is as follow: to 4"pipe is 4 mitres, to 6" pipe is 6 mitres, to 10" pipe is 8 mitres , to 18"pipe is 10 mitres , and above is 12 mitres.
- Any penetration of the metal jacket by pipe supports, nipples etc., will be weatherproofed by metal flashing.
- Fabrication of Reducers and Tees according to specification.
- Fix the metal jacket using stainless steel bands.
- Using a sealant material (silicon Or mastic tap) to close the holes.
- Install the Raw materials polyurethane (polyol /isocyaiate)into injection machine tanks.
- Polyol is designed for the production of polyurethane using for Cold insulation. Reaction of Polyol with isocyanate give foams with excellent flow ability, resulting in a Very even density distribution. Good physical properties and dimensional Stability are provided as well as good adhesion to usual facings and short Demold times.
- Cleaning the pipelines and equipmrnts after injection process.

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