Polyurethane insulated steel pipe for renovation

Description :

　　Polyurethane insulation pipe is made of high-performance polyether polyol combination material and multiple methyl poly (phenylene glycol) as raw materials through chemical reaction foaming. Polyurethane insulation pipes have excellent characteristics such as light bulk density, high strength, thermal insulation, sound insulation, flame retardancy, cold resistance, corrosion resistance, non water absorption, and easy and fast construction. They have become indispensable materials for insulation, waterproofing, sealing, and other industrial sectors such as construction, transportation, petroleum, chemical, power, and refrigeration. Polyurethane insulation pipes are used for insulation and cooling engineering of various indoor and outdoor pipelines, central heating pipelines, central air conditioning pipelines, chemical, pharmaceutical and other industrial pipelines.

　　summary; Since the birth of polyurethane synthetic materials in the 1930s, polyurethane foam insulation pipes have been rapidly developed as an excellent insulation material, and their application scope has become increasingly wide. Due to their simple construction and significant energy-saving and anti-corrosion effects, they have been widely used in various pipelines such as heating, cooling, oil transportation, and steam transportation. Widely used in various pipelines for heating, cooling, oil transportation, steam transportation, etc. Directly buried heating pipelines do not require the construction of large trenches, only the insulation pipes need to be buried underground, thus greatly reducing project land occupation, reducing excavation volume by more than 50%, and reducing civil engineering masonry and concrete volume by 90%. At the same time, insulation pipe processing and on-site trenching are carried out in parallel, requiring only on-site joints, which can shorten the construction period by more than 50%. Prefabricated buried insulation pipes are widely used in liquid and gas transportation pipelines, chemical pipeline insulation engineering, petroleum, chemical, centralized heating networks, central air conditioning ventilation pipelines, municipal engineering, etc. Directly buried insulation pipe is a type of prefabricated insulation pipe with good insulation performance, safety and reliability, and low engineering cost.

　　Effectively solved the insulation, sliding lubrication, and waterproofing problems of prefabricated buried insulation pipes for high temperature heat transfer from 130 ℃ to 600 ℃ in urban centralized heating. Directly buried insulation pipes not only have advanced technology and practical performance that traditional trench and overhead pipelines cannot match, but also have significant social and economic benefits, and are also powerful measures for heating energy conservation. The use of direct buried heating pipeline technology for prefabricated insulation pipes marks a new starting point in the development of polyurethane insulation pipe technology for heating in China. The raw material varieties represented by iron ore have shown obvious signs of bottoming out and rebounding. The cost collapse logic of the previous dominant industry chain weakening has ended, and the focus of the later industry chain will shift to the supply and demand of finished materials. Recently, the supply of finished products has continued to shrink, and steel inventories in steel mills and society have significantly decreased. The tight supply-demand balance pattern is highlighted, and steel prices are expected to return to an upward trend in the future.

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