In the fields of petrochemicals, water supply, heating, and industrial refrigeration, most of the traditional inner layers of anti-corrosion and heat insulation measures use asbestos, ash, or polyurethane, and the outer layer uses asbestos cloth for corrosion protection. The effect is not ideal. Recently, the reporter saw in an interview with Qilu Petrochemical Life Management Department's new thermal insulation material factory that a prefabricated polyethylene insulation jacket that can be overhead or buried was born, opening up a new space for anticorrosive and heat-insulating materials. This type of new building material that is being promoted and applied in the construction field in this country has many advantages such as environmental protection, good performance, and easy construction, and is increasingly favored by the market.
Li Fujun, the director of the new thermal insulation material plant of Qilu Petrochemical Company, told reporters that the outer jacket of polyethylene is made of high-density polyethylene. The diameter, length, and other model specifications of the product can be adjusted according to the needs of users; the construction of the project is performed by the insulation material factory. The steel pipe requiring anti-corrosion and heat preservation is sheathed in a polyethylene sleeve, and the polyurethane foam is injected in the middle so as to fully fill the gap between the steel pipe and the polyethylene sleeve, and finally the steel pipe, the sleeve and the heat insulation layer form a firm whole. To achieve the effect of anti-corrosion insulation; this anti-corrosion insulation method can be overhead or buried in the ground, the entire construction process is carried out on site.
According to reports, compared with the traditional direct-buried insulation materials, the polyethylene outer casing has the characteristics of high mechanical strength, good sealing performance, strong corrosion resistance, low heat loss, long service life, etc., and is specifically expressed in the following aspects: Through the setting of the fixed support and sliding support mechanical compensator, the deformation of the direct-buried thermal insulation pipe is standardized and coordinated, and the engineering damage caused by thermal expansion and contraction is eliminated; and the waterproof, moisture-proof, acid-proof, alkali-proof, salt-proof and oil-proof can be effectively prevented. , And overall good, beautiful appearance, no deformation, structure does not enter the water; By setting the overall polyurethane foam layer, so that the insulation layer, the outer sheath formed a whole, to solve the overhead, buried insulation steel corrosion issues , The service life can reach 30-50 years, while the traditional insulation material has a short life, generally only between 3-5 years; the polyurethane foam filled in the casing has good mechanical properties and thermal insulation properties, and usually works continuously. Can withstand 120 degrees Celsius, short-term temperature of 130 degrees Celsius.