Heat-Insulating HDPE Pipe Production Line\Pre-Insulated Pipe Extrusion Line

Product Description

Heat-Insulating HDPE Pipe Production Line\Pre-Insulated Pipe Extrusion Line

There's two different method to manufacture the insualtion pipe: 

Diameter below 426mm, we provide one step insulating extrusion line which is produce HDPE jacket ,thread steel pipe and inject foam together;

Diameter bigger than 426mm, we provide two steps Extrusion Line which is produce HDPE insulation jacket prodcution line first, then inject foam between HDPE jacket and steel pipe;

One Step Insulation Pipe extrusion line
This one step technology is to cover the steel tube surface with insulation layer& anti-corrosion layer at the same time, thus forms insulating& anti-corrosion layer of the pepeline, which is pioneer way in China, Compred wich other methods, it features continuous operation, high efficiency, low cost, energy saving, labor saving, environment pollution-free and so on. Progress second prize, several technology update to the advanced international lever. After updating technology, it has reached internation advanced lever.
The outer jacket can be yellow color and black color.
Technical features of Insulation pipe extrusion line
1. can be operated continuously, high production efficiency, low cost, energy saving
2. automatic deviation adjusting machine, high exactness, steady working, effective correction
3. the whole line all conveyed by rubber wheel, avoid damage to anti-corrosion layer of steel tube
4. casing layer stick with foam layer, foam layer stick with anti-corrosion layer, anti-corrosion layer firmly stick with steel tube.
5,Foming machine online foaming;
6,Pushing machine push the steel into the clad die head&Mould easily;
Specification table of insulation pipe: The thickness of foaming layer and casing can be desinged according to customer's requirement

Steel Tube Size(mm)	Casing Wall Thickness(mm)	Insulating Layer(mm)
45	2.0	29
57	2.0	29
76	2.2	30
89	2.2	30
108	2.4	30
133	2.4	30
159	2.5	40
219	2.5	40
273	3.0	40
325	3.0	40
377	3.5	40
426	4	50

Constitute of Heat-Insulating HDPE Pipe Production Line\Pre-Insulated Pipe Extrusion Line:
1,Pushing Machine
2,Single Screw Extruder
3,Die Head&Mould for threading the steel pipe
4,Low Pressure Foaming Machine
5,Water Cooling Tank 
6,Auto Deviation Correction Machine
7,Transmission Line for conveying steel pipe and conveying finished foam pipe

Two Step Heat-Insulating HDPE Pipe Production Line\Pre-Insulated Pipe Extrusion Line
Isolate heat layer and anti-corrosion layer are wrapped on steel pipe at the same time, continuous production, high efficiency and low cost.
Machine feature: low cost, without vacuum calibration tank, inner pressure produce method;
In-line ball blast de-rust, in-line painting and antirust treatment.
Diameter range: Φ48-Φ1800mm.
This set is mainly used to produce the big size PE insulation pipe jacket. Its product is mainly used in the outer layer of heating pipe line, the middle layer is polyurethane foaming layer and the inner layer is steel tube. 
It can also produce water supply pipe and drain pipe by adding the vacuum calibration tank and cooling tank. 
This set is composed of extruder, die and mould, cooling water sink, haul off machine, clipping pipe machine, bracket, support frame and electric controlling pats, etc.

Technology flow:HDPE two step method is produce the HDPE casing in first step, then thread pipe inside the casing and foaming in the middle of it.
Main technical data:

Extruder	Haul off machine	Main mould	Pipe dia.
SJ90-1/25	SJGF-400-6 claws	Φ110, Φ250	Φ75-Φ400
SJ120-1/25	SJGF-800-8 claws	Φ420	Φ400-Φ760
SJ150-1/25	SJGF-1500-10 claws	Φ760	Φ600-Φ1800

Following is Photoes of Outer HDPE jacket:

To Increase the adhensive between foam layer and HDPE jacket, we provide the Corona Treatment Machine as following;

Following is threading steel pipe inside the HDPE jacket, then foam in the middle of it;


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