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Perforated Steel Skeleton Polyethylene Composite Pipe

Perforated steel skeleton polyethylene composite pipes,It is a bonded reinforced composite pipes formed by continuous extrusion composite molding, using a perforated thin-walled steel plate with argon arc straight seam welding or plasma spiral welding as the reinforcement body and polyethylene pipeline special material as the matrix.
The "Shuangteng" brand Perforated steel skeleton polyethylene composite pipes is suitable for new, renovated, and expanded industrial and mining enterprise projects and municipal water supply projects that transport medium temperatures not exceeding 70 ℃ and maximum design internal water pressure not exceeding 2.o MPa. When using heat-resistant polyethylene (PE-RT) as the matrix, the maximum operating temperature can be increased to 85 .

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SHAUNGTENG

Product Description

Dimensions

Nominal Diameter / dₙ / mm	Thickness / mm	Nominal Pressure / MPa
Nominal diameter	Thickness	For water supply	For industry
50	≥4.0	2.0	2.0
63	≥4.5	2.0	2.0
75	≥5.0	2.0	2.0
90	≥5.5	2.0	2.0
110	≥6.0	2.0	2.0
140	≥8.0	1.6	1.6
160	≥9.0	1.6	1.6
200	≥10.0	1.6	1.6
225	≥11.0	1.6	1.6
250	≥11.0	1.6	1.6
315	≥12.0	1.25	1.6
355	≥13.0	1.25	1.25
400	≥14.0	1.25	1.25
450	≥15.0	1.0	1.25
500	≥16.0	1.0	1.25
630	≥17.0	1.0	1.0

* Product specifications not specified in the table can be adjusted or customized according to the actual needs of customers

Physical and mechanical properties

Item	Conditions	Requirements
Hydrostatic Strength	Temperature: 20℃, Duration: 1 h, Test Pressure: Nominal Pressure × 1.5	No leakage, no rupture
	Temperature: 70℃, Duration: 165 h, Test Pressure: Nominal Pressure × 1.5 × 0.76	No leakage, no rupture
	^aTemperature: 85℃, Duration: 165 h, Test Pressure: Nominal Pressure × 1.5 × 0.66	No leakage, no rupture
Burst Pressure	Temperature: 20℃, Continuous pressure increase until specimen bursts	≥ Nominal Pressure × 3
Stress Crack Stability	Compress to 50% of the outer diameter and hold for 10 min	No cracks
Longitudinal Reversion Rate / (%)	110℃, hold for 1 h	≤ 0.3

* Only applicable to composite pipes based on heat-resistant polyethylene (PE-RT).

Pressure derating coefficient for various temperature

Temperature t / ℃	-20 < t ≤ 20	20 < t ≤ 30	30 < t ≤ 40	40 < t ≤ 50	50 < t ≤ 60	60 < t ≤ 70	70 < t ≤ 80	80 < t ≤ 85
Reduction Factor	1	0.95	0.90	0.86	0.81	0.76	0.71	0.66

Standards And Technical Specification

◉《Polyethylene(PE) composite pipes with porous steel strip for water supply》CJ/T181-2003

◉《Perforated steel skeleton polyethylene composite pipes for industry》HG/T 3706-2014

◉《fittings of Perforated steel skeleton polyethylene composite pipes for industry》HG/T 3707-2012

◉《Polyethylene (PE) piping systems for water supply-Part 3: Pipe fittings》GB/T13663.3-2018

◉《Cross helically wound steel wires reinforced-Polyethylene composite pipelines for water supply》GB/T 32439-2015

◉《Technical specification for buried plastic pipeline of water supply engineering》CJJ 101-2016

◉《Code for construction and acceptance of water and sewerage pipeline works》GB/T 50268-2008

Characteristic

◉ The composite of steel and plastic materials is uniform and reliable, with good creep resistance and high lasting mechanical strength

◉ Excellent corrosion resistance, smooth inner wall, less prone to scaling, and can maintain the good hydraulic characteristics of pipelines for a long time.

◉ Good temperature resistance and thermal expansion coefficient similar to steel pipes, with strong adaptability to environmental temperature changes.

◉ Good impact resistance, rigidity, and dimensional stability. Compared with pure plastic pipes, it is not only suitable for direct burial but also meets the

needs of overhead laying

◉ Green, environmentally friendly, pollution-free, and with good hygiene performance

◉ Lightweight, convenient for transportation and construction, fast and reliable connection, no leakage, and low overall engineering cost.