PSP Steel-plastic Pipe

PSP steel-plastic composite pressure 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 is up to 275-320MPa, which is 7-8 times higher than 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: Smooth inner wall, no scaling, 20-30% larger water flow than galvanized pipe;
4. Excellent corrosion resistance: resistant to corrosion of various acids, alkalis, salts solution etc.;
5. With self-tracing: could be traced with a magnetic metal detector, do not have to bury another tracking or protection markers, can avoid excavation damage.
6. service life is more than 50 years;
7. Using electromagnetic double hot melt technology, safe and reliable installation and connection.

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;

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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PSP Steel-plastic Pipe

Product Features

Application Areas

Specification & Dimension

Performance Indicators

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