Tashqi himoya yo'lagi madxozning ta'siri natijasida hosil bo'lgan va jarayonning ta'siri tufayli, uning mexanik xususiyatlari va keskinlik kuchlari kabi mexanik xususiyatlari sezilarli darajada yaxshilandi.
Rigid polyurethane spray polyethylene winding prefabricated direct-buried insulation pipe is composed of the working steel pipe (core pipe) for conveying medium, polyurethane rigid foam plastic insulation layer, and polyethylene outer protective layer. The thickness of the insulation layer and the outer protective layer can be adjusted arbitrarily within a certain range during production according to needs.
Amalga oshirish standartlari
Inner pipe material
ubmerged arc welded spiral steel pipe, seamless steel pipe, etc.
Dizayn bosimi
P≤1.6MPa
Conveying medium
Hot water, cold water, etc.
Dizayn harorati
T≤40 ℃
Implementation standard
GB / T34611-2017
Polyurethane density
≥60kg / m3
Xizmat muddati
30 yildan katta yoki unga teng
Outer protective pipe density
≥940 kg/m3 and ≤960kg/m3
Mahsulot diagrammasi
Mahsulot afzalliklari
(1) The polyurethane spraying process results in better uniformity of the polyurethane insulation layer density, better stability of the thermal conductivity coefficient, higher closed-cell rate, lower water absorption, and smaller axial eccentricity of the insulation pipe;
(2) The polyurethane insulation layer is formed by free foaming, with the direction of bubble initiation perpendicular to the axial direction of the pipe, improving the compressive strength of the insulation layer.
(3) The bonding performance between the polyurethane insulation layer and the working steel pipe is stronger. (The polyurethane raw material is sprayed in liquid form onto the surface of the steel pipe, then reacts and forms. Due to the high reactivity of the sprayed polyurethane raw material, its bonding force is superior to traditional processes.)
(4) Due to the spray molding, the surface roughness of the polyurethane foam is higher, and the bonding performance with the outer protective polyethylene sheet is stronger.
(5) The polyethylene outer protective layer, while ensuring its performance, is thinner and more uniform, which can save costs.
(6) The polyethylene outer protective layer is formed by circumferential winding. Affected by process stretching, its mechanical performance indicators such as circumferential elongation and tensile strength are significantly improved.
Mahsulot xususiyatlari
Work tube engineering diameter
（DN）mm
Insulation thickness
mm
Outer protective layer outer diameter
（Dc）mm
Minimum wall thickness of outer protective layer.
（emin）mm
300
30 ~ 50
393 ~ 433
4.0
350
30 ~ 50
445 ~ 485
4.0
400
30 ~ 60
494 ~ 554
4.0
450
30 ~ 60
547 ~ 607
4.5
500
30 ~ 60
598 ~ 658
4.5
600
30 ~ 60
700 ~ 760
5.0
700
30 ~ 60
790 ~ 850
5.0
800
30 ~ 60
891 ~ 951
5.5
900
30 ~ 60
992 ~ 1052
6,0
1000
30 ~ 60
1093 ~ 1153
6.5
1100
30 ~ 60
1194 ~ 1254
7.0
1200
40 ~ 100
1316 ~ 1436
8.0
1400
50 ~ 120
1538 ~ 1678
9.0
1600
60 ~ 140
1760 ~ 1920 yil
10.0
Note: Other outer diameters of the outer protective layer can be selected according to design requirements,
but the minimum wall thickness of the outer protective layer for steel pipes of the same diameter should be the same.
● Custom production can be carried out according to user requirements; optional anti-leakage early warning system can automatically detect pipeline network leakage faults, automatically alarm, and has high safety stability.
● The design and calculation of product specifications need to consider specific application conditions, involving more parameters. Please contact Yuanfeng Company.
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.
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