Direct burial insulation and anti-corrosion pipe is a composite pipe coated with anti-corrosion layer, heat insulation layer and pressure resistant layer on the outer wall of steel pipe. It has the characteristics of small heat loss, strong compressive performance and good anticorrosion and waterproof performance. It is especially suitable for areas with high groundwater level. Compared with traditional buried pipes, it has a series of advantages such as good insulation performance, good anticorrosion performance, long service life, simple construction and installation, small footprint and low cost. It is widely used in the fields of centralized heating, oil transmission, chemical industry, refrigeration and water supply in cold areas. Product structure and main technical indicators 1. product structure: direct buried insulation anti-corrosion pipeline includes the outer wall of steel pipe anti-corrosion layer, insulation layer and anti-pressure protection layer. Anti-corrosion layer: GII epoxy asphalt coating has good resistance to acid, alkali and corrosion resistance. Insulation layer: rigid polyurethane foam. Anti-pressure protection layer: FRP protection layer. It has excellent characteristics such as efficient heat preservation, waterproof, anti-corrosion, heat insulation, sound insulation, flame retardant, cold resistance, anti-corrosion, light weight, high strength, easy construction and not afraid of plant roots and thorns. It has become an indispensable investment in insulation, waterproofing, plugging and sealing of materials in industrial sectors such as construction, transportation, petroleum, chemical, electric power and refrigeration.
Directly buried insulation pipe, also known as "pipe in pipe", is divided into two steps. It is composed of high-density polyethylene outer protection layer, polyurethane rigid foam insulation material and steel pipe. The insulation material is rigid polyurethane foam with density of 60kg/m3 to 80kg/m3. The gap between steel pipe and casing is completely filled with a certain bonding strength, so that a solid whole is formed between the three parts of steel pipe, outer casing and insulation layer. Polyurethane direct buried insulation pipe foam has good mechanical properties and heat preservation performance. Under normal condition, it can withstand high temperature of 120 degrees. By modifying or combining with other heat insulation materials, it can withstand high temperature of 180 degrees. It is suitable for all kinds of high temperature and low temperature cold and hot water pipes.
Polyethylene jacket is made of high-density polyethylene (HDPE), which has high mechanical strength and good corrosion resistance. It can protect the pipe from damage by external factors during transportation, installation and use.
Polyurethane direct buried pipe has become a developed and mature advanced energy-saving technology. With the advantages of excellent performance, convenient construction and long service life, polyurethane direct buried pipe has brought great economic and social benefits to users.
