The working pipe and insulation layer are completely protected by the outer protective pipe, and can be used continuously for 30 years under normal working conditions.
Galvanised iron insulated pipe consists of a steel pipe for conveying medium (working pipe), a polyurethane rigid foam insulation layer, and galvanised iron (outer protective layer). It is mainly used for overhead polyurethane insulation pipes and is primarily used in liquid and gas pipeline networks, district heating networks, and municipal construction projects.
Product features
(1) Insulation performance
This product uses a polyurethane insulation layer structure, effectively reducing heat loss.
(2) Ease of construction
The insulated pipe is factory prefabricated, with both ends exposed for a length of 150-250, making it convenient for alignment and welding during on-site construction.
(3) Weather resistance
The iron used for the outer protective pipe is coated with a galvanised anti-corrosion layer, allowing it to remain in outdoor environments for extended periods without corroding. As this product uses galvanised iron instead of the traditional polyethylene outer protective pipe, it avoids the issue of polyethylene ageing in outdoor environments over time. The galvanised iron outer protective pipe adopts a spiral forming structure, which offers good overall bending performance and stress conditions at the joint seams.
Specification and model
Specifications（mm）
Working steel pipe outer diameter
× wall thickness
(mm)
Due to the three-layer structure of this insulated pipe, the working pipe and insulation layer are fully protected by the outer protective pipe, allowing for continuous use for 30 years under normal working conditions.
Hebei Yuanfeng Pipeline Engineering Co., Ltd. was established in 2013 with a registered capital of 22.18 million yuan. It is a comprehensive R&D service enterprise focused on the production of steel jacketed steel direct-buried steam pipes, polyurethane direct-buried insulation pipes, spray-wound insulation pipes, galvanised iron overhead insulation pipes, PERT-II type insulation pipes, insulation pipe fittings, and joint installation.
The company has strong production capabilities. Currently, it owns five production lines for polyurethane spray polyethylene wound prefabricated direct-buried insulation pipes, with an annual production of over 3,000 km of DN500mm-DN1600mm polyurethane spray polyethylene wound prefabricated direct-buried insulation pipes; 20 automatic winding machines for steel jacketed steel direct-buried steam insulation pipes, 8 sets of fully automatic pipe threading machines, 3 CNC intersecting line cutting machines, 2 pipeline fitting welding machines, 2 CNC plasma cutting machines, 10 external clamp cutting beveling machines, and 12 argon arc welders. It has 10 high-density polyethylene outer protective pipe production lines, with extrusion diameters reaching φ2000mm. The outer protective pipe production lines adopt advanced processes such as single-screw extrusion, vacuum sizing, corona treatment, spray cooling, and automatic cutting, capable of producing 30,000 tonnes of various types of high-density polyethylene outer protective pipes each year with diameters ranging from φ90-φ2000mm; 6 polyurethane prefabricated direct-buried insulation pipe production lines, 3 PU600 high-pressure foaming machines, capable of producing 5,000 km of DN20~DN1600mm insulation pipes; and 3 prefabricated overhead type polyurethane insulation pipe production lines, with an annual production of 2,000 km of DN25-DN1400mm prefabricated overhead type polyurethane insulation pipes.
The company has production bases in Hebei, Inner Mongolia, Tianjin, and Liaoning, covering a total area of over 500 acres. The company's products cover China and more than 20 other countries and regions, including Mongolia, Russia, the Middle East, and South Africa. The products are mainly used for high-temperature steam transportation, central heating, and central cooling.
Relying on advanced production technology, complete supporting equipment, and supply service systems, the company provides high-standard pipeline products to a wide range of customers, ensuring the safe operation of long-distance pipeline networks.
