Производство тяньцзинь прямая подземная предварительно изолированная теплоизоляционная стальная труба для трубопровода горячей воды

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Products Description


Main Indexs of Pre-insulated Pipe
Product Name
Product Indexes
Reference Standard
Unit
Standard Requirement






Finished product
Steel pipe without thermal insulation layer
CJ/T114-4.4.1
mm
150-250
Increasing rate of HDPE outer protection pipe
CJ/T114-4.4.2
%
≤ 2
Axis eccentricity
CJ/T114-4.4.3
mm
see clause 4.4.3
Expectation of life
CJ/T114-4.4.4.1
year
120℃ 30 years
Shear strength(170℃,1450h after aging)
CJ/T114-4.4.4.2
MPa
(23±2℃)>0.12
(140±2℃) >0.08
Shock resistance
CJ/T114-4.4.5
3kg/2m
see clause 4.4.5
Resistance value between alarm line
CJ/T114-4.4.6
 MΩ
more than 20MΩ






Outer protection pipe
Density
CJ/T114-4.2.3.1
kg/m3
≥940
Elongation at break
CJ/T114-4.2.3.4
%
≥350
Tensile yield stength
CJ/T114-4.2.3.4
MPa
≥19
Longitudinal shrinkage rate
CJ/T114-4.2.3.5
%
≤3
Long term Mechanical properties
CJ/T114-4.2.3.6
80℃ 4.0MPa
>1500h free from damage
The difference of the melt flow rate
CJ/T114-4.2.3.2
g/10min
≤0.5
Carbon Black content
CJ/T114-4.2.3.1
%
2.5±0.5







Polyurethane insulation layer
Density
CJ/T114-4.3.2
kg/m3
≥60
Average pore size
CJ/T114-4.3.1
mm
≤0.5
Percentage of close area
CJ/T114-4.3.1
%
≥88
Compressive strength
CJ/T114-4.3.3
MPa
≥0.3
Water absorption
CJ/T114-4.3.4
%
Immersion in boiling water 90 minutes, bubble water absorption should be not more than 10%
Coefficient of thermal conductivity before aging
CJ/T114-4.3.5
w/(m.k)
≤0.033
Cavity
CJ/T114-4.3.1
≤1/3 the thickness of insulation layer

Working steel pipe
Seamless steel pipe(≤DN150)
GB8163
20#, X42,X52,X60,X70
Up to standards
Spiral steel pipe (≥DN200)
GB/T9711 or SY/T5037
Q235B,Q355B,X42,X52,X60,X70
Up to standards


Company Profile






Customer Visit & Exhibition




Laboratory Center




Logistic & Delivery






FAQ




1. who are we?
We are based in Tianjin, China, start from 2015,sell to Domestic Market(30.00%),South America(15.00%),Southeast
Asia(15.00%),Eastern Europe(15.00%),Africa(10.00%),Mid East(10.00%),Eastern Asia(5.00%). There are total about more around 100 people in our office.

2. how can we guarantee quality?
Always pre-production sample testing before mass production;
Always accept Third Party Inspection or Client Inspection
Always final Inspection before shipment;

3.what can you buy from us?
steel pipes, hollow section tubes, sheet piles, square/rectangular tubes, scaffolding system, building construction materials.

4. why should you buy from us not from other suppliers?
Tianjin Mingyue Steel Co.,Ltd., belongs to Tianjin Xinyue Steel Group, located in Daqiuzhuang Industrial Area, Tianjin, China, consolidating steel pipe, hollow section tubes, sheet piles, square/rectangular tubes, scaffolding system, building construction materials..Our aim is to provide the best service for our customers.

5. what services can we provide?
Accepted Delivery Terms: FOB, CFR, CIF, EXW, FAS, CIP, FCA, DDP, DDU, Express Delivery, DAF;
Accepted Payment Currency: USD, EUR, HKD, CNY;
Accepted Payment Type: T/T, L/C, D/P, D/A, PayPal, Western Union;
Language Spoken: English, Chinese, Spanish, Portuguese, Russian


Contact Us




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