Along with establishment of foundation of the plastic pipe industry in China, the market requirements are developing by leaps and bounds. According to experiences in the developed countries, the maximum field for pipe application is the drainage and sewerage pipes, especially in the outdoor underground pipes. The pipe for drainage and sewerage is account to 56.2% of the total value in the European countries while it is only 10% in China. This difference illustrates that the underground pipe is only at the preliminary stage with a huge market potentiality. The drain piping is an important and essential foundation for the modern municipal construction, facing with a historical opportunity for the large investment.

At present, the demand of drain pipe exceeds its supply and is becoming a hot field of investment. The production equipment and its technology for the corrugated pipe winded with steel strip were developed in the 1990’s. They are now widely used in many fields in the developed countries, especially for water, drainage, sewerage piping in industries and agriculture in USA, Canada, Japan, Korea and the European countries. An extrusion line for the corrugated pipe winded by steel strip is newly presented by Zhongyun, combining international advanced technologies, with a diameter range of ID 800 mm—3,500 mm, which fills the gap in China and is the best choice for replacement of the imported ones.
　　
Product features
(1) Light weight, high ring stiffness, low cost, with strong market competitive power. Under the same diameter and ring stiffness, the lightest weight per meter can be obtained for the pipe over 800 mm of diameter and materials can be cut down by 20%－60% in comparison with those of the hollow winded pipe, the moulding ribs winded pipe and the double wall corrugated pipe.

(2) Easy and reliable connecting, by thermo-melt coupling (for the purposes of drainage, sewerage and ventilation) or thermo-shrinking film, or outer half-block with sealing rings.

(3) Excellent low temperature resistance, being installed between －60℃～ 60℃．

(4) High complete strength, bearing large axial tensile force and circumferential ring stress.

(5) Good soil adaptability. It has a good adaptability without breaking for resisting earth settlement and movement because of high coefficient at rupture which is up to 500%.

(6) Excellent flowing performance. The flow is bigger than that in cement pipe under the same diameter because of the small flow resistance.

(7) Excellent wear and corrosion resistance. Its life is longer than that of the cement pipe.

(8) Being green product for environmental protection, without any pollution.

Purposes of the Product
(1) It can be widely used in the drainage and sewerage piping of municipal construction.

(2) Irrigation engineering for farmland, irrigation network, water supply and drainage flooded fields.

(3) Fluid conveying in chemical and mineral Industries.

(4) Piping in factories, sewerage treatment plants and other public places.

Main Features 
● The strip pitch can be easily adjusted by a pitch mechanism so as to achieve the best ring stiffness and the lowest unit weight. 

● The forming and bending of the strip and forming of the composite pipe is synchronically controlled by PCC control system, avoiding disadvantages of pulling off, piling up and breaking of the strip during forming, ensuring 100% of the finished product rate. 
 
● A special composition device makes the forming of the spiral strip and inner pipe stable, with adjusting function both for inner and outer wall thickness. 

● A professional PCC (B&R, Austria) control system is adopted for high automation, reliable running and easy operation.  

● Long-distance communicative function can realize tele-diagnosis and maintenance.

Technical Data

Model

GDLG-1500

GDLG-2500

GDLG-3500

Model

GDLG-1500

GDLG-2500

GDLG-3500

Pipe diameter range(ID), mm

Φ800-Φ1,200

Φ1,500-Φ2,000

Φ2,500-Φ3,000

Uncoiler

FDJ-1500

FDJ-2500

FDJ-3500

Productivity, kg/h

680

800

1,100

Al tap connecting machine

JDJ-1500

JDJ-2500

JDJ-3500

Installed power, KW

395

440

585

Al tap storing machine

CDJ-1500

CDJ-2500

CDJ-3500

External dimension, m

26×17×3.5

28×18×4

32×20×4.5

Strip forming machine

GCX-1500

GCX-2500

GCX-3500

Total weight, t

28

32

38

Strip bending machine

GWJ-1500

GWJ-2500

GWJ-3500

Uncoiler

FDJ-1500

FDJ-2500

BW-3500

Outer wall extruder

SJ65/25B

SJ90/25B

SJ90/25B

High frequency heater

SP-40BD

SP-60BD

SP-80BD

Outer wall die

800,
1,000,
1,200

1,500,
1,800,
2,000

2,500,
2,800,
3,000

Heat preservation machine

BW-1500

BW-2500

BW-3500

Inner wall extruder

SJ90/25B

SJ90/30B

SJ90/30B

Coating extruder

SJ65/25B

SJ65/25B

SJ65/25B

Inner wall die

800,
1,000,
1,200

1,500,
1,800,
2,000

2,500,
2,800,
3,000

Coating die

Φ1,200

Φ2,000

Φ3,000

Composition forming mahine

FH-1500

FH-2500

FH-3500

Cooling flume

PLC-6000

PLC-6000

PLC-6000

Cutter

SGQ-3500

SGQ-3500

SGQ-3500

Pulling machine

DY-3

DY-3

DY-3

Stacker

SGD-1500

SGD-2500

SGD-3500

Coiler

SJJ-1500

SJJ-2500

SJJ-3500