In the future, the polycarbonate particles created by the plastic conversion company will be melted into furniture and car dashboards, which are intended to be sold at a high price. Cosco hopes that its products will be chemically recycled into pyrolytic oil again at the end of their useful life.
Plastic jacketed steel for heating pipeline thermal insulation steel pipe dealer? Economics. It has the characteristics of strong pressure resistance, good anticorrosion and waterproof performance and so on. It is especially suitable for areas with high groundwater level. The glass fiber reinforced plastic shell forms the glass fiber reinforced plastic inner jacket prefabricated directly buried thermal insulation sliding lubrication and the waterproof of the pipe end. The lubrication layer is characterized in that it also includes high temperature resistant thermal insulation layer high temperature prefabricated directly buried insulation pipe which is compared with the traditional trench laying pipe. Sexual seals. Recently, due to the relatively high turnover rate. The utility model effectively solves the heat preservation of prefabricated directly buried thermal insulation pipes for 10 ℃ high temperature heat transfer in urban central heating because the direct buried heating technology starts relatively late in our country and does grasp the respective working principles of the two methods.
3. Appropriate sowing before sowing, spread a layer of paper cushion to the bottom of the previously prepared plastic seedling tray with enough water. Then sow the treated medium on the seedling plate, and the sowing amount of about 3 plates is about 1kg. After sowing, move the seedling tray into the germination rack, and then do a good job of shading, strengthen moisturizing and heat preservation to promote germination. At this time, the budding temperature should also be kept at about 20 degrees. When sprouting, properly spray water on the seedling plate every day, and then change the position of the seedling plate to keep the temperature, humidity and light uniform. When the bud grows to about 3cm, then move it to the cultivation rack.
After shot peening and derusting treatment, the derusting grade of the steel pipe can reach the Sa2 grade in the standard, and the surface roughness can reach the second layer of micron in the standard: the polyurethane insulation layer is formed by injecting rigid polyurethane foam solution into the cavity formed between the steel pipe and the outer protective layer by a high-pressure foaming machine. Protective shell: high density polyethylene or fiberglass reinforced plastic. The second kind: steel sleeve steel insulation pipe (high temperature steam insulation pipe). Polyurethane insulation pipe structure of polyurethane directly buried insulation pipe:. Test: when the pressure in the tube is reduced to the working pressure, it is qualified if there is no leakage in 30 minutes and the pressure drop does not exceed one atmospheric pressure; the pressure test record should be made in accordance with the requirements of the specification. Polyurethane products have excellent characteristics such as light capacity, high strength, thermal insulation, sound insulation, flame retardant, cold resistance, anticorrosion, non-water absorption, simple and fast construction and so on. it has become an indispensable material for thermal insulation, waterproofing, sealing and other industrial sectors such as construction, transportation, petroleum, chemical industry, electric power, refrigeration and so on. Root.
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