Plastic-lined and Coating Plastic Steel Pipe


GB/T28897-2012: Steel Pipe of complex plastic.

CJ/T120-2008: Coating plastic steel pipes for water supply.


Plastic-lined pipe used in fluid transportation such as drinking water, fuel gas, fire protection,chemical product, and heating projects etc. Coating plastic pipe used for fire sprinkler, HAV, gas, oil, chemical anticorrosion, underground anticorrosion, cable anticorrosion, desulfurization anticorrosion, UV protection anticorrosion, an-ti-static and anti-flaming anticorrosion and liquid delivery etc.

Product Detail

Product Tags

Base Pipe

EN10217 P235TR/P265TR/ EN10224 L235/L275/EN10255 S195T/API 5L B/X-42/X52/ASTM A795 GrA/B.

Plastic-lined Materials

Polyethylene, Polyethylene of raised temperature resistance.

Coated Plastic Materials

Polyethylene powder, Epoxy powder.

Thickness Requirement for Plastic-lined Layer and Coating Plastic Layer

Inch Inner surface plastic-line pipe Inner surface coating plastic Outside surface coating plastic
Normal Reinforced Normal Reinforced
  mm mm mm mm mm mm mm
1/2-3/4 1.5 N/A N/A N/A N/A N/A N/A
1"-2 1/2" 1.5 >0.4 >0.3 >0.5 >0.6 >0.3 >0.35
3"-5" 2 >0.5 >0.35 >0.6 >1.0 >0.35 >0.4
6" 2.5 >0.5 >0.35 >0.6 >1.0 >0.35 >0.4
8" 2.5 >0.6 >0.35 >0.8 >1.2 >0.35 >0.4
10" -12" N/A >0.6 >0.35 >0.8 >1.2 >0.35 >0.4
14"-20" N/A >0.6 >0.35 >0.8 >1.3 >0.35 >0.4
22"-30" N/A >0.8 >0.4 >1.0 >1.5 >0.4 >0.45
32"-48" N/A >1.0 >0.45 >1.2 >1.8 >0.45 >0.5
Plastic-Lined And Coating Plastic Steel Pipe new

The plastic steel pipe lined with galvanized seamless steel pipe and welded steel pipe is used as the base pipe. The inner wall is lined with food-grade polyethylene (PE) pipe of the same diameter as the galvanized pipe after the welding ribs are removed. The thickness of the polyethylene lining shall meet the HG/T 20538-2016 standard.

Scope of Application

(Environmental protection) Lined plastic steel pipe technology lined plastic steel pipe inherited the advantages of steel pipe and plastic pipe, and according to the market demand, production process, anti-corrosion measures, connection, cost-effective and many other aspects of the reasonable design of the pipe after comprehensive analysis. Therefore, the pipe has many technical characteristics, widely used in all kinds of buildings cold and hot water supply system. The connection mode has special clamp ring connection, groove (clamp) connection or wire buckle connection, the construction process is similar to the groove connection of steel pipe and wire buckle connection.
With the popularity of people's awareness of environmental protection and health, new environmental water supply pipes spring up like bamboo shoots after rain, and there are too many varieties to enumerate. Lined plastic steel pipe inherits the advantages of steel pipe and plastic pipe, but abandons their disadvantages. One of the most important contents in the pipe design is to determine the wall thickness of the pipe reasonably according to the conditions and requirements of use, and this parameter directly affects the cost performance of the product. The unique wall thickness design of lined plastic steel pipe includes inner plastic pipe wall thickness and outer welded pipe wall thickness, which determines a series of technical characteristics:
1. Wide range of application, complete specifications and varieties;
2. Unique production technology;
3. Reliable and fast connection mode;
4. the surface corrosion prevention measures perfect, beautiful;
5. the outer welded pipe wall thickness design is reasonable;
6. The wall thickness of the inner plastic pipe is reasonable to ensure the diameter;
7. energy saving and environmental protection, great development potential;
Plastic coated steel pipe, also known as plastic coated pipe, steel-plastic composite pipe, plastic coated composite steel pipe, is a steel pipe as the matrix, through spraying, rolling, dipping, sucking process in the steel pipe (bottom pipe) inner surface of a layer of plastic anticorrosive layer or in the inner and outer surface of the plastic composite steel pipe. Coated plastic steel pipe has excellent corrosion resistance and relatively small friction resistance. Epoxy resin coated plastic steel pipe is suitable for water supply and drainage, sea water, warm water, oil, gas and other media transportation, PVC coated plastic steel pipe is suitable for drainage, sea water, oil, gas and other media transportation.

Product Characteristics

Coated steel pipe is made of PE(modified polyethylene) for hot dip plastic or EP(epoxy resin) for internal and external coating products, with excellent corrosion resistance. At the same time, the coating itself also has good electrical insulation, no electrical corrosion. Low water absorption, high mechanical strength, small friction coefficient, can achieve the purpose of long-term use. It can also effectively prevent the damage of plant roots and soil environmental stress. Convenient connection and easy maintenance.

Product Advantage

1. Adapt to buried and humid environment, and can withstand high and very low temperature.
2. Strong anti-interference ability, if coated steel tube as cable sleeve, can effectively shield outside signal interference.
3. Good pressure strength, maximum pressure up to 6Mpa.
4. Good insulation performance, as a wire protection tube will never occur leakage phenomenon.
5. No burr, smooth tube wall, suitable for the construction of the time to wear wire or cable.

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