Structure of polyurethane foam insulation pipe:
1. inner steel pipe
2.polyurethane foam layer
3.outer protection layer
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.
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 centigrade and more than 30 years's life..
4.Sweating soldering processtFirstly, 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 processt
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 processt
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.
Product Specification / Models
Machanical Property of PE Layer
Density:more than 940Kg/mu00b3 CJ/T114-2000 EN253 (reference standard)
Carbon black content :2.5u00b10.5% CJ/T114-2000 EN253 (reference standard)
Tensile yield strngth:more than 19MPa CJ/T114-2000 EN253 (reference standard)
Break elongation:more than 350% CJ/T114-2000 EN253 (reference standard)
Longirudinal shrinkage rate:less than 3% CJ/T114-2000 EN253 (reference standard)
Long-term mechanical properties :more than 1500h CJ/T114-2000 EN253 (reference standard)
The main properties of finished tube
Increase of external diameter :less than 2 % CJ/T114-2000 EN253 (reference standard)
Impact resistance performance :No bovious crack on the outer sleeve CJ/T114-2000 EN253 (reference standard)
Axial shear strength :0.12 (23u00b12 temperature)MPa CJ/T114-2000 EN253 (reference standard)
Exposed section of steel pipe end : more than 150mm CJ/T114-2000 EN253 (reference standard)
Machanical Property of Polyurethane foam layer
Density : more than 60Kg/mu00b3 CJ/T114 (reference standard)
Compressive strength :more than 0.3MPa GB/T12811 (reference standard)
Water absorption : less than 10% GB/T8813 (reference standard)
Thermal conductivity :less than 0.033W/m.k CJ/T114 (reference standard)
Hole blind rate :more than 88% GB/T10297 (reference standard)
Heat resistance :140 temperature 30 year GB/T10799 (reference standard)
Average pore diameter :less than 0.5mm CJ/T114 (reference standard)
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.
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.
Hebei Huidong Pipe Co.,LTD(former Canghai Fitting Group Branch)is a professional enterprise which produces insulation pipes ,pipe fittings,polyethylene pipes and pipe installation construction. The company is located in Zhenggang Industrial Park,the east of Yanshan County,the city of cangzhou,Hebei Province. The company was founded in September,1984.Since its inception,the company has been developing rapidly,and in June,2009,the independent legal person was registered.The company has the registered capital of 100 million CNY,the area of 65834 square meters,the existing staff of 216 people,39 engineering and technical personnels,including 3 senior engineer and 8 engineers.
The company has eight insulation pipe production lines,Every year DN50-DN1680 insulation pipes of 1800km are produced. There are 137 sets of fitting production,testing equipments,annual production pipe fittings of 36000 pieces and 6advanced polyethylene pipe production lines. We use the most advanced international technology such as spiral mould extrusion and vacuum sizing spray cooling and automatic cutting etc. 40000 tons of DN90-DN1800 polyethylene outside pipes are produced every year.
The company has taken the lead in passing ISO9001:2008,ISO14001:2004 and GB/T28001:2001 authentication. In 2010,the company obtained"The People's Republic of China special equipment manufacturing license "awarded by PRC National Quality Supervision and Inspection Bureau.
The company is a member unit of China's Urban Heating Association,and was named"National hundred excellent quality manufactures"by China Building Materials Circulation Association. The company's "Huidong" brand insulation straight pipes and pipe fittings were named "China's Ten Top Brand pipeline" and it has been named "AAA" enterprise by Cangzhou Bank of two consecutive years,was rated as"Start enterprise"by Bureau of Township Enterprises, was rated as"Key construction advanced unit" by the municipal government, was awarded as "Integrity unit" Quality trustworthy unit" Outstanding supply manufacture" and"Contract trustworthiness enterprise"by customer units for many times.
Our company has strong production ability,advanced management mode,perfect quality management system and excellent after-sales service system. We will adhering to the objective of "Quality is life and the user is god" and maximumly meet user's requirements, sincerely hope to cooperate with you, and seek common development of a win-win situation.