TECHNICAL SPECIFICATIONS OF THE ETX-PUR COMBINED THERMAL INSULATION THE IZOFREX FOIL COATING
One meter of isolation is combined of two sections. The upper section secures the outer part of the pipeline in the middle of the border and is composed of the following elements:
the IZOFREX foil coating fixed permanently to the insulation structure; at the same time the insulation casing overhangs the lower section,
three or four (depending on the diameter of a pipeline) iron belts of 4cm in width placed between the polyurethane layer and the outside coating for a fast joint between two halves of the insulation
the layers of rigid, foamed polyurethane insulation with shaped edges (both side and head) become fitting “locks” helping avoid thermal bridges,
internal surfaces of the insulation are additionally secured by a 3 mm layer of glass fiber intercepting the first heat wave from the pipeline, protecting the foam from melting and abrupt changes of temperature common for pipelines.
The thickness of the isolation is calculated according to the PN-B-02421 standard and is dependent on the temperature of a heat factor and the diameter of a pipeline.
The lower section secures the underside of the pipeline in the middle of its girth and its construction is analogical to the upper section.
After foaming the junctions, the front section joints on the outside borders of the insulation are secured by bonds of the IZOFREX foil coating.
Coatings of the upper and lower sections, as well as clamps are joined by means of hot air, after riveting the iron bands underneath the coating. Such finish creates a closed casing of the insulation.
Turns and bends of sections are assembled on mats of mineral wool. Junctions of these turns and bends are bond together on the assembly spot with polyurethane foam.
A disassembly of one meter of combined insulation is done by cutting off (drilling through) the rivets of clamps joining the upper and the lower section of the insulation.
A correct disassembly of the elements lets you reclaim 100% of insulation from the given section.
The inside diameter of combined insulation is always greater than the outside diameter of a pipeline up to 10 to 20 mm, which makes it possible to save the construction independence towards temperature stresses and movement (own motions) during a heating cycle. This construction independence enables movement of whole sections of insulations assembled on high trestle bridges, over all passageways and crossings.
The insulation together with the coating shows higher tear resistance and its structure is a homogenous whole.
All the elements, as well as insulation itself, have passed quality tests, approvals and sanitary certificates.
Approval no. for heat insulation: AT-15-7501/2007.