Product Detail
Composite flat wall plastic-steel embedded type seamless drain pipe
Composite flat wall plastic-steel embedded type seamless drain pipe
Detail
Composite flat wall plastic-steel embedded type seamless drain pipe is a T-shaped plate prefabricated of polyethylene (PE) resin as the main raw material. Plate is wrapped on the pipe forming machine and thermowelded to pipe, meanwhile, W-shaped steel band rolled of band steel is embedded in the slot between the two plates, and PE covered on the steel band becomes the external wall of pipe. This is the third generation new plastic-steel drain pipe.
Product specificationProduct colorRaw materialExecutive standardService life
Φ300-2200mmBlackPolyethylene (PE) resinCG/P329-2010Design service life is 50 years
1、High hoop rigidity (main technical indicators of drain pipe): Being tested and applied in the project, its hoop rigidity is greater than SN8 (SN20 at the highest), which is incomparable by HDPE plastic pipe generally.
2、Pipe wall thickness is uniform and performance is consistent: There is no thinner part because the pipe wall thickness is uniform. Thus, the performance of pipe wall is consistent.
3、 No leakage: The same material is used for welding between plates (HOPE welding is excellent), and welding seam is uniform and firm without leakage after rolling and cooling.
4、Fine corrosion resistance: For traditional steel-plastic pipes, their steel bands and PE plates are bonded together. Because the expansion coefficient of PE is 10 times of that of the steel, PE is easily pulled apart during thermal expansion or cold shrinkage, so that the traditional steel-plastic pipe may loss corrosion resistance. However, for composite flat wall plastic-steel embedded type drain pipes, their steel bands are enclosed in the middle of the pipe walls by PE plates and are “free” relatively, which well solves the above difficulty of easy cracking.
5、Save on transport costs: In case of large pipe engineering, equipment can be carried to site for production, so as to save the transport costs greatly.
6、Long pipe. During pipe forming, plates and steel bands can be connected continuously, so that the pipe can be made as required as longer, and even only one pipe is set between two manholes. Thus, connections of pipes are reduced or omitted for further reducing leakage.
7、Thin pipe wall and low cost: elastic modulus of steel is 200 times of HDPE, but the price of HDPE is three to four times of that of steel, thus, steel bands with high intensity are used for making pipe framework, so as to thin down the pipe wall greatly.
6、Long pipe. During pipe forming, plates and steel bands can be connected continuously, so that the pipe can be made as required as longer, and even only one pipe is set between two manholes. Thus, connections of pipes are reduced or omitted for further reducing leakage.
7、Thin pipe wall and low cost: elastic modulus of steel is 200 times of HDPE, but the price of HDPE is three to four times of that of steel, thus, steel bands with high intensity are used for making pipe framework, so as to thin down the pipe wall greatly.
8、Adjustable pipe diameter: The same plate (steel band) can be made to pipes of different diameters according to the requirements of hoop rigidity. Thus, the pipe has high flexibility and is easy to cut.
9、Fast installation rate: Socket joints are adopted between pipes and pipe and manholes, with fast installation rate and low fee.
10、Settlement resistance:Due to advanced design of pipe wall structure and reasonable process design, the double flat wall plastic-steel wrapped drain pipes have the performances of rigidity and flexibility. Through rigorous breakdown test done by us, the composite flat wall plastic-steel embedded type seamless drain pipes can resist severe environment and settlement of stratum;
   (1) When the pipe section is wafered for 50%, the internal and external walls may not be cracked.
   (2) When the middle point is pressed for compression 13%, the internal walls are bulge but external walls are not cracked.
Application areaConstruction requirements
 1、Be applicable to the drain pipe for corrosive sewage of industry, chemical plant, medicine plant and other trades;
 2、Be applicable to the infiltration and drain pipes for underground, railway and expressway;
 3、Be applicable le to buried drain and blow-off pipes around municipal engineering and building engineering;
 4、Be applicable to large dock, port engineering airport engineering;
 5、Especially be applicable to large drainage and blowdown main pipes of municipal engineering.
Refer to Detail Drawing of Groove Excavation and Foundation Pit Supporting of Composite Flat Wall Plastic-steel Embedded Seamless Drain Pipes, and strictly comply with the requirements of national and industry standards GB 50268-2008 Code for Construction and Acceptance of Water Supply and Sewerage Pipelines.
Precautions 1、Pipes must not be impacted, broken and pressed severely during handing and transportation;
 2、Light pipes with short diameter can be handed manually. Pipes with large diameter should be handed by machines. In case of the latter, flexible hanging strips or ropes (nylon rope etc.) should be used. Two hanging points on the pipe should be located at about 1/4 of the ends of the pipe;
  3、Bottoms of vehicles and ships are contacted with the pipes as flat as possible and rolling and impact prevention measures should be taken. Do not contact with the sharp objects, so as not to scar the pipes;
Dimension drawing of composite flat wall plastic-steel embedded type seamless drain pipe
S/NNominal dimension DN/IDMinimum average internal diameterMinimum inner wall thicknessLoop rigidity and parameter of steel band
SN8SN12.5SN16
Minimum thickness of steel bandMinimum height of steel bandMinimum thickness of steel bandMinimum height of steel bandMinimum thickness of steel bandMinimum height of steel band
13002942.50.5120.6140.818
24003922.50.5120.6141.018
35004903.50.6140.7160.620
46005883.50.6160.7160.820
57006853.50.6160.8180.920
68007854.0-4.50.8201.0201.024
79008854.2-4.80.8220.8241.026
810009854.2-50.8240.8261.030
9120011854.3-51.0241.0261.030
101400138550.8301.0301.036
111500148550.9301.0321.036
121600158551.0301.0321.036
131800178561.0341.0361.042
142000198561.0361.0401.042
152200218570.8421.0421.048
Physical mechanical properties of pipe
ItemRequirements
Loop rigidity(KN/m)SN8 ≥8
SN12.5 ≥12.5
SN16 ≥16
Impact property≤10%
Loop flexibilitySample is smooth without reverse bend and breakage
Oven testNo stratification and cracking at melt seam of pipe
Creep ratio≤2%
Tensile strength of jointsNominal dimension/mmMinimum tensile pull born by pipe (N)
300≤DN≤ID500600
600≤DN/ID≤800840
900≤DN/ID≤18001200
2000≤DN/ID≤30001440