PSP Steel Plastic Composite Pipe

PSP steel plastic composite pipe adopts the composite structure of internal and external plastic layers with reinforced steel pipe in the middle.

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Product Features Application Areas Specification & Dimension Performance Indicators

Product Features

1. Excellent physical and mechanical properties: The tensile strength of psp composite pipe is as high as 275-320MPa, which is 7-8 times that of pure plastic pipe;
2. Small expansion coefficient: the linear expansion coefficient is 1.2×10-5/℃, close to the expansion coefficient of steel pipe 1.1-1.2×10-5/℃, and the linear expansion coefficient of pure plastic is 14-16×10-5/℃;
3. Small resistance coefficient: The inner wall of PSP steel-plastic composite pipe is smooth and scale-free, and the water flow rate is 20-30% higher than that of galvanized pipe;
4. Excellent corrosion resistance: PSP steel-plastic composite pipe is resistant to corrosion by various acids, alkalis, salt solutions, etc.;
5. With self-tracking function: PSP steel plastic composite pipe can be tracked by magnetic metal detectors, without the need to bury tracking or protection marks separately, which can avoid damage caused by excavation.
6. The service life of PSP steel plastic composite pipe exceeds 50 years;
7. PSP steel plastic composite pipe adopts electromagnetic double hot melt technology for connection, and the installation is safe and reliable.

Application Areas

1. Water supply of residential community;

2. Building secondary water supply network, main standpipe;

3. Living water supply and fire-fighting pipelines of industrial park;

4. Living water supply of expressway service area ;

5. Outdoor buried water supply pipe network;

PSP Steel Plastic Composite Pipe application

Specification & Dimension

DN/OD	Min. Average Outside Diameter	Max. Average Outside Diameter	Nominal Pressure
			PN/MPa
			2.0					2.5
			Min. thickness of inner PPR layer	Min. thickness of steel strip	Min. thickness of outer PPR layer	Pipe wall thickness	Pipe wall deviation	Min. thickness of inner PPR layer	Min. thickness of steel strip	Min.thickness of outer PPR layer	Pipe wall thickness	Pipe wall deviation
20	20	20.3	0.8	0.2	0.4	2	+0.4 -0.2	0.8	0.3	0.4	2	+0.4 -0.2
25	25	25.3	1	0.3	0.6	2.5	+0.4 -0.2	1	0.4	0.6	2.5	+0.4 -0.2
32	32	32.3	1.2	0.3	0.7	3	+0.4 -0.2	1.2	0.4	0.7	3	+0.4 -0.2
40	40	40.4	1.3	0.4	0.8	3.5	+0.5 -0.2	1.3	0.5	0.8	3.5	+0.5 -0.2
50	50	50.5	1.4	0.5	1.5	4.5	+0.8 -0.2	1.4	0.6	1.5	4.5	+0.8 -0.2
63	63	63.6	1.7	0.6	1.7	5	+0.9 -0.2	-	-	-	-	-
75	75	75.7	1.9	0.6	1.9	5.5	+1.0 -0.2	-	-	-	-	-
90	90	90.8	2	0.8	2	6	+1.2 -0.2	-	-	-	-	-
110	110	110.9	2	1	2.2	6.5	+1.4 -0.2	-	-	-	-	-
140	140	141.2	2	1.6	2.2	7	+1.6 -0.2	-	-	-	-	-
160	160	161.6	2	1.6	2.2	7	+1.6 -0.2	-	-	-	-	-
200	200	202	2	2	2.2	7.5	+1.8 -0.2	-	-	-	-	-
250	250	252.4	2	2.6	2.3	8.5	+2.2 -0.2	-	-	-	-	-

Performance Indicators

Test Item	Test Method	Indicator
Hydrostatic Pressure Strength	Test temperature: 80 ± 2 ℃ Test pressure: Max. working pressure×2 Test time: 165h	No leakage
	Test temperature: 95 ± 2 ℃ Test pressure: Max. working pressure×2 Test time: 165h
	Test temperature: 80 ± 2 ℃ Test pressure: Max. working pressure×2 Test time: 165h
Bursting Strength	GB/T15560	≥Max. working pressure×3
Cracking Stability Under Pressure	Randomly selected length of 10000mm composite pipe sample for testing, the sample is placed in the pressure plate of hydraulic testing machine and is pressed down slowly to 50% original OD of pipe in 10S-15S.	No cracking
Bonding Property	Peeling strength: Take a long strip of steel-plastic composite pipe with a width of 25mm and a length of 200mm or more, clamp the steel strip at one end and the plastic layer at the other end of the splice tester, and carry out the peeling tensile test.	Peeling strength value≥100N/25mm
Bonding Property	Interlayer bonding strength: Randomly select a composite pipe ring sample, the length is about 100mm to 150mm, remove the the burr and band saw marks of two end face, use the special flaring tool to flare the pipe ring, and leave the flared pipe ring at room temperature for 24h.	There should be no separation and no gaps between the inner and outer PPR layers and the steel layer
Pipe Welding Quality	Welding strength:Randomly select a composite pipe ring sample, the length is about 100mm to 150mm, remove the the burr and band saw marks of two end face, use the special flaring tool to flare the pipe ring	There shall be no tearing at the pipe butt welds or anywhere in the steel strip

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