Diameter sheet
|
Specifications
(mm)
|
OD ×Thickness
(mm)
|
Outer protection tube diameter ×Wall thickness
(mm)
|
Insulation thickness
(mm)
|
Unit weight
Kg/m
|
|
32/90
|
32×2.8
|
90×2.5
|
26.5
|
3
|
|
45/110
|
45×2.8
|
110×2.5
|
30.0
|
4
|
|
57/120
|
57×3.0
|
120×2.5
|
29.0
|
6
|
|
60/125
|
60×3.5
|
125×3.0
|
29.5
|
7
|
|
76/140
|
76×4.0
|
140×3.0
|
29.0
|
9
|
|
89/160
|
89×4.0
|
160×3.0
|
32.5
|
11
|
|
108/180
|
108×4.0
|
180×3.0
|
33.0
|
13
|
|
133/200
|
133×4.5
|
200×3.2
|
30.3
|
17
|
|
159/250
|
159×4.5
|
250×3.9
|
41.6
|
22
|
|
219/315
|
219×6.0
|
315×4.9
|
43.1
|
39
|
|
273/365
|
273×6.0
|
365×5.6
|
40.4
|
49
|
|
325/420
|
325×7.0
|
420×7.0
|
40.5
|
67
|
|
377/500
|
377×7.0
|
500×7.8
|
53.7
|
81
|
|
426/560
|
426×7.0
|
560×8.8
|
58.2
|
94
|
|
478/600
|
478×7.0
|
600×8.8
|
52.2
|
104
|
|
529/630
|
529×7.0
|
630×9.8
|
40.7
|
114
|
|
529/655
|
529×7.0
|
655×9.8
|
53.2
|
117
|
|
630/760
|
630×8.0
|
760×11.5
|
53.5
|
158
|
|
720/850
|
720×8.0
|
850×12.0
|
53.0
|
181
|
|
820/960
|
820×10.0
|
960×14.0
|
56.0
|
252
|
|
920/1055
|
920×10.0
|
1055×14.0
|
53.5
|
281
|
|
1020/1155
|
1020×10.0
|
1155×14.0
|
53.5
|
312
|
|
1220/1380
|
1220×12.0
|
1380×16.0
|
64.0
|
444
|
|
1420/1602
|
1420×14.0
|
1602×16.0
|
75.0
|
590
|
Structure of polyurethane insulation pipe
Advanced production technique
|
1. Shot blasting process
|
Shot blasting treatment is necessary before foaming.
First, this process polished outer surface of the qualified pipes,remove the oxide,dust and oil stain of the pipe surface
Then increase adhesion of the pipe.
Last,It improved the adhensive strength between the polyurethane insulation layer and the pipe.
|
|
2.Electric corona treatment process
|
Electrode corona process carry out the principle of high pressure electrode discharge. To make electric corona treatment for the inner surface of PE pipes.
|
|
3.Polyurethane foam
|
We use PU600 high-pressure foam machine.and its capacity of injection materials reaches 600L/min, pressure of injection material reaches 30MPa.Our polyurethane raw material is from Bayer Company in German.Which is fluorine-free products with best quality. Also it meet all the data of our chinese Ministry of Construction and European standards. , it can continously working under the temperature 148℃ and more than 30 years’s life..
|
|
4.Sweating soldering process
|
Firstly, this process makes the V type welding junction melted.at the same time, Under the pressure of welding machine, it makes the extruded melted PE to be welded tightly on the junction.
|
|
5.Hot plate welding process
|
According to the principle of PE sweating soldering, to preheat the junction of the pipe with different angles on the hot plate. after it reaches the resonable temperature.quickly exert the axial pressure on the pipes to enable the melted pipe orifice be welded perfect.
|
|
6.Electric sweating soldering interface process
|
Through the method of electrical heating, the joint coupling can be used with PE outer protecting pipes, which has high welding strngth, and is applicable for the construction that adopts various laying direct-buried prefabricated insulation pipe joints.
|
Machanical Property of Polyurethane foam layer
|
Items
|
Unit
|
Technical data
|
Testing method
|
|
Density
|
Kg/m³
|
≥60
|
CJ/T114
|
|
Compressive strength
|
MPa
|
≥0.3
|
GB/T12811
|
|
Water absorption
|
%
|
≤10
|
GB/T8813
|
|
Thermal conductivity
|
W/m.k
|
≤0.033
|
CJ/T114
|
|
Hole blind rate
|
%
|
≥88
|
GB/T10297
|
|
Heat resistance
|
|
140℃ 30 year
|
GB/T10799
|
|
Average pore diameter
|
mm
|
≤0.5
|
CJ/T114
|
Polyurethane foam machine
Machanical Property of PE Layer
|
Items
|
Unit
|
Reference standard
|
Performance requirements
|
|
Density
|
Kg/m³
|
CJ/T114-2000 EN253
|
≥940
≥944
|
|
Carbon black content
|
%
|
CJ/T114-2000 EN253
|
2.5±0.5
|
|
Tensile yield strngth
|
MPa
|
CJ/T114-2000 EN253
|
≥19
|
|
Break elongation
|
%
|
CJ/T114-2000 EN253
|
≥350
|
|
Longirudinal shrinkage rate
|
%
|
CJ/T114-2000 EN253
|
≤3
|
|
Long-term mechanical properties
|
h
|
CJ/T114-2000 EN253
|
≥1500
|
The main properties of finished tube
|
Items
|
Unit
|
Reference standard
|
Performance requirements
|
|
Increase of external diameter
|
%
|
CJ/T114-2000 EN253
|
≤2
|
|
Impact resistance performance
|
|
CJ/T114-2000 EN253
|
No bovious crack on the outer sleeve
|
|
Axial shear strength
|
MPa
|
CJ/T114-2000 EN253
|
0.12 (23±2℃)
0.08 (23±2℃)
|
|
Exposed section of steel pipe end
|
mm
|
CJ/T114-2000 EN253
|
≥150
|
Our patent:
Production Progress map
Shipping
Products show
Construction field progress
Certificates
Service
1.Technical service,technical training,technical guidance and technical date are provided freely.
2.Filed service,implement a regular review system,help customers to solve problem in pipeline in time.
3.After sales service,adhearing to the "one-step"work style as our service concept,focus on providing customers with continuous system service.
FAQ
1.Never come here to visit, only by communicate,how to trust our products ?
From our company established, we won hundreds of bidding. which total amount all above $5 million.
2.how to trust our quality of products ?
We established good relationships with our cooperated clients, never received quality complaint from them.
Of course, The Third Party inspection will be welcome.
3.If we have special requirements for the production and material, can you accept ?
Of course,we own our professinal reserch and development group,any special requirements can be communicated. By the way, by experiment ,this group won the patent of pipe fittings tee.
