Tangshan, Hebei, China
Member Since: 2019
Business Type: Manufacturer/Factory
Steel jacket steam insulation pipe introduction
Direct buried steam pipeline have kinds of structures, but dating back to the root causes and mechanism, it's a derivative directly buried hot water piping and pipeline, which can be divided into external sliding type and internal sliding type.
External sliding type
This type design method comes from heat pipe trench. Change the pipe trench from common brick or concrete to steel jacket pipe. Install support inside the steel jacket pipe and make the work steel pipe with the insulation material closely contacted. The work steel pipe is supported in the steel jacket pipe, to make the support rolled inside the steel jacket pipe, forming the structure of steel pipe trench. This structure is adopting the soft insulation materials, which effectively settles the problem of increased frication caused by radial expansion. It can't cause insulation eccentricity and crushed phenomenon because of inner supporting ring.
External sliding steam insulation pipe structure:
1.Work steel pipe 2.Anti-corrosive paint layer3.Rolling support
4.Insulation material 5.Air layer 6.Aluminum foil reflect layer
7.Outer jacket steel pipe8.Outer anti-corrosive layer9.Solid stainless steel band
Internal sliding type
This type firstly comes from hot water pre-fabricated insulation pipe, to improve the insulation pipe thermal endurance, first will package a layer of high temperature resistant inorganic heat preservation material out of the work steel, and drop the wall temperature into the polyurethane temperature range. Polyurethane foaming at the external of the work steel pipe and package the outer jacket pipe for waterproofing. This structure type characteristic is to produce sliding between work steel pipe and insulation material in the inner rigid. But it's hard to deal with the flow leakage, and thermal walking of the pipe fitting is hard to compensate large diameter pipeline of work steel pipe greater weight, so it's easy to cause insulation material eccentric or crush to increase the inner friction.
Internal sliding steam insulation pipe structure
1.Work steel 2. Anti-corrosion paint layer 3. Aluminium silicate fibrofelt (Drag reducing layer) 4. Calcium silicate insulation material(Heat insulation layer)
5. Aluminum foil reflect layer
6. Polyurethane insulation layer
7.Outer steel pipe 8.Outer anti-corrosive layer 9. Solid stainless steel band
The up two insulation structure are applied at home. It's more reliable to adopt external than the internal sliding in design theory, because the force analysis is simple, the internal air layer Settings easily, row of wet is better. Abroad basically adopts the sliding structure, and the promotion use has gradually been recognized by everyone in domestic.
External sliding steel jacket steam insulation pipe specification
|Work steel pipe OD*thickness|
|Outer protection pipe OD*thickness|
The insulation pipe is executed the Ministry of Construction standard of CJ/T200-2004, CJJ104-2005.
Other specifications of steam insulation pipe are available as customers' request.The insulation layer can be made as customers' request.
|Specification (mm)||Work steel pipe OD*thickness(mm)||Outer protection pipe OD*thickness(mm)||Insulation thickness|
The insulation pipe fitting is executed the Ministry of Construction standard of CJ/T246-2007.
Other specifications of steam insulation elbow are available as customers' request.
"Steel jacket" external sliding type pr-fabricated direct buried steam insulation pipe main performance index
|Performance index||Reference standard||Unit||Standard requirement|
|Finished pipe combination|
|Appearance||CJ/T200-2004||No obvious pits,bulges,cracks|
|Work pipe axial movement||CJ/T200-2004||No jam can move|
|Outer protection pipe temperature||CJ/T200-2004||ºC||≤50|
|Heat loss||CJ/T200-2004||W/Square meter||≤100|
|Overall compressive strength||CJ/T200-2004||MPa||≥0.08|
|Vacuum absolute pressure(Vacuum type)||CECS206-2006||mbar||20|
|Extra-fine glass wool|
|Maximum working temperature||CJ/T200-2004||ºC||454|
|Average fiber diameter||CJ/T200-2004||μm||6|
|Water tolerance||CJ/T200-2004||100 degrees of boiling water||No significant changes in physical|
|Anti-moisture||CJ/T200-2004||Expose 96h||Moisture is less than the product weight|
|Anti-corrosion||CJ/T200-2004||For steel||No corrosion|
|Fire proofing||CJ/T200-2004||Non inflammability||Grade A|
|Steel pipe outer anti-corrosion|
|Electric spark leak detector||GB/T23257-2009||25KV||No leakage|
|Glass steel anti-corrosion|
|Gum content||GB/T 2577-1989||%||45-50|
|Tensile strength||GB/T 2577-1989||MPa||≥150|
|Compressive strength||GB/T 2577-1989||MPa||≥150|
|Bending strength||GB/T 2577-1989||MPa||≥50|
|Thermal conductivity||GB/T 2577-1989||W/(m.K)||≤0.28|
|Heat resistance||GB/T 2577-1989||ºC||-40-100|
Picture of hot water pipe
Xingbang plumbing is the participated unit of the New National Standard in China's insulation pipe industry.
We have participated in formulating three sets national standards:(GB/T28638-2012, GB/T29046-2012, GB/T29047-2012).We have gained ISO9001 International Quality Management System, ISO14001 Environment Management System, GB/T28001 Occupation Health Safety Management System.
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.