Tangshan, Hebei, China
Member Since: 2019
Business Type: Manufacturer/Factory
Introduction of "One-step method" Pre-insulated Pipe
"One-step method" polyurethane pre-fabricated direct buried insulation pipe is suitable for transporting continuous working temperature not higher than 100 centigrade and working pressure not higher than 2.5MPa in net work system.
3.Polyethylene casing pipe
It is suitable for transportation temperature (continuous working temperature) ≤ 100 ºC, and working pressure ≤ 2.5 MPa. It is mainly used in the secondary pipe network system of urban central heating.
The molding process of one-step method is adopted by one time cladding which is different from pipe in pipe method. The insulation pipe has no special requirements for the trinity because transporting low temperature medium.
One-step method polyurethane pre-fabricated direct buried insulation pipe is executed the technical specification of GB/T50538-2000 which is for buried steel pipeline anti-corrosion insulation layer.
The molding process of one-step method should heat the steel pipe outer surface to 30±5 centigrade and preheat the compound polyether and isocyanates to stated temperature before forming. The compound polyether should be constant stirred. The spray gun pressure should not lower than 0.5MPa.
Transporting medium temperature below 100 centigrade, deviation of insulation layer and outer protection layer (mm)
|Molding process||Steel pipe diameter||Eccentric distance||Minimum thickness of outer protection pipe|
Polyurethane foam plastic performance index
|Dimension change rate||%||≤3|
|Weight change rate||%||≤2|
|Strengthen change rate||%||≥5|
Learn more about the production process>>>
1: Are you a manufacturer or a trading company?
We are a manufacturer which has more than 2 0 years' history.
2: Where is your manufacturer? How to visit it?
Our factory located in Yutian Economic Development Zone ,TangShan , China. A bout 1.5 hours drive time to Beijing and TianJin airport . Mainly producing pre-insulated pipes, HDPE outer protection pipe and 3PE anti-corrosive pipe.
You can take a plane to Beijing or Tianjin .then we could pick up you at the airport .
3: How do we control our products' quality?
We have professional quality control workers and quality inspection center(CNAS lab) to control the entireproduction quality.
4: How do you transport these products?
We use straps to hoist pre-insulated pipes, it can avoid no damage to our products, no hooks for lifting pipedirectly. During the handling process, collision, tossing and more ground drag scrolling are strictly forbidden.
In the process of long distance transport, the pipes should be fixed, and not damage outer protecting pipesand insulating layers.
5: Can I customize some other sizes of products?
Yes! We can according to the customer's request.
If you have any other questions, please don't hesitate, contact us.