Insulation steel pipes are widely used in liquid and gas transmission pipe networks, chemical pipe insulation projects in petroleum, chemical, central heating and heating networks, central air-conditioning ventilation pipes, and municipal engineering. High-temperature prefabricated direct-buried thermal Insulation steel pipe is a direct-buried prefabricated thermal Insulation steel pipe with good thermal insulation performance, safety and reliability, and low construction cost.
1.The pre-insulated steel pipe coated with high density polyurethane foam can resistant the temperature up to 140°c.
2.With the corrosion resistant hdpe jacket pipe can make the pipe directly buried underground without trench.
3.Different size pipe and pipe fittings can service for different heating and cooling project.
4.The polyurethane foam thickness can be designed from 26.5-83mm or more.
|Description||polyurethane thermal insulation steel pipe|
|Length||1m-12m ,or by customer’s requirements|
|Production Standard||API 5L PSL1/ PSL2,ASTM A53,ASTM A252,GB/T9711.1,GB/T3091,SY/T 5037-2012,DIN1626,EN10219,EN10217|
|End||30~35° Beveled end|
|Quality Control||100% X-Ray inspection
100%Hydraulic Pressure test
100% Ultrasonic inspection
|Internal lining||Epoxy , cement motar, and according to customers requirement|
|Laid way||Buried, overhead, trench|
Grade of the steel pipe
and pipe fitting
|20#/Q235 Seamless steel pipe and spiral steel pipe (GB and oil standard)|
Fluoride-Free water foamed rigid polyurethane foam material
(foam density: 60kg/m3-80kg/m3
Inner surface tension of the
high density polyethylene pipe
Effectively solve the problem of insulation, sliding lubrication and water resistance of polyurethane thermal insulation steel pipe ends of prefabricated direct-buried thermal insulation tubes used for high temperature heat transmission from 130°C to 600°C (Steel Pipe With Heat Insulation) in central urban heating. High-temperature prefabricated direct-buried thermal polyurethane thermal insulation steel pipe not only have the advanced technology and practical performance that are difficult to compare with traditional trenches and overhead pipelines, but also have significant social and economic benefits, and are also powerful measures for heating and energy saving. High-temperature prefabricated direct-buried thermal Insulation steel pipe adopts direct-buried heating pipeline technology, which indicates that the technology development of China’s heating pipeline has entered a new starting point.
The polyurethane thermal insulation steel pipe is composed of a steel pipe, a glass fiber reinforced plastic inner sheath, and a glass fiber reinforced plastic outer shell. Its feature is that it also includes a high temperature insulation insulation layer, a lubricating layer, and an elastic seal. The utility model effectively solves the problem of heat preservation, sliding lubrication and waterproofness of the exposed tube end of a prefabricated direct-buried heat preservation tube used for high temperature heat transmission of 130°C-600°C in a concentrated urban heating system.