Polyurethane Spraying Prefabricated Insulated Steel Pipe Automatic Production Line

Product description
Vacuum calibrating method pre-insulated pipe outside casing extrusion line is the most advanced and popular machinery in the world. HSD brand absorbs the advanced technology from German and improve to meet development. Especially compared with internal pressure method, Vacuum calibrating method is much better than it for stiffness, pressure resistance and surface smooth.

Rigid polyurethane spraying polyethylene winding prefabricated directly buried insulation pipe consists of steel working pipe, spraying polyurethane rigid foam insulation layer and winding polyethylene outer protective pipe. See the following figure for product structure

Technological flow:
Steel pipe Load-up online---->External shot blasting ----> dust collector---->internal blow out---->lifting transport pipe trolley---->transport to chuck----> chuck hoist cylinder----> alignment chuck center---->mechanical arm station adjust---->chuck hydraulic clamping---->chuck guard at both ends----> carrier pipe servo transport---->IF heating----> PU foam spraying----> pipe load down line----> transport pipe ----> PE film wrapping----> water cooling---->cutting down pipeline---->trim end of pipe---->printing mark&loading down finished pipe---->sealing end of pipe

(1). Steel pipe rust removal: use a hydraulic lifter to transport the steel pipe to conveying line. The steel pipe rotates and enters the shot blasting chamber. When the internal sensor collects the signal of incoming steel pipe, the shot blasting machine starts to work. The shooting projectiles hits the outer surface of the steel pipe, removing rust and impurities attached to pipe surface, and the steel pipe moves onto the conveying line. After shot blasting treatment, the outer surface of the steel pipe meets the requirements of SA2.5.
(2). Polyurethane spraying: The steel pipe moves forward at a constant speed on rotating wheels. The spraying robot blow foaming materials to form umbrella shaped fog to evenly spray it onto surface of the rotating steel pipe. The polyurethane raw materials foam within a short period of time to achieve the required compressive strength and design thickness. When the insulation layer is very thick, multiple times of spraying can be required.
(3). Polyethylene pipe winding: The steel pipe that has been coated with polyurethane insulation layer rotates and moves along the conveying line. The extruder extrudes a certain thickness of molten polyethylene sheet and winds it on outer surface of the insulation layer. As the insulated steel pipe continues to move forward, the extruder continuously extrudes the molten polyethylene sheet material and wraps it on the surface of the polyurethane layer to form protective layer.
(4). Spray cooling: The semi-finished pipe wrapped with a polyethylene outer protective layer is cooled by an online spraying device. The polyethylene outer protective layer tightly wraps the polyurethane insulation layer on the steel pipe, completing the production of insulated steel pipe.
(5). Tracking and cutting: online track the pipe and cut automatically. When the sensor detects incoming pipe, the control system automatically starts the cutting saw. While the saw blade rotates at high speed, the cutting mechanism performs circumferential cutting around the pipe. Online cutting not only ensures high quality cutting ends, but also ensures the continuity of production and improves production efficiency.
(6). Number the finished pipe and put pipes into warehouse

Other supplier racks

The integrated welded structure, without adjustment devices, cannot be installed when the ground is uneven. The height of the stand cannot be adjusted, resulting in uneven rolling of steel pipes on the stand, too fast rolling, or difficult rolling, which poses a safety hazard.

Main accessories

1. Our Factory

Qingdao Huashida Machinery Co., Ltd. is located in Qingdao High & New Technology Industrial Area- Qingdao Huashida industrial Park, covers an area of about 4000 square meters. We have tens of years experience in plastic pipe, sheet, and board extrusion lines, and pipe joints and welding tools such as heat shrinkable sleeve, Electro fusion sleeve etc.

2. Our main products

Our main products include as following,

HDPE PU pre-insulation Jacket Pipe extrusion line

3PE steel pipe anticorrosion&coating machinery

Rubber&plastic foam flexible insulation tube/sheet production line

HDPE water supplying pipe extrusion line

PE PP sheet board extrusion line

Heat shrinkable sleeve production line

Hollow wall spiral pipe production line

Plastic welding rod extrusion line

Radiation cross-linked PE heat shrinkable sleeve

Electro fusion tape

Portable extrusion welder

3. Our products Application.

Our machines make products what are widely used as jacket pipe of PU foam insulation pipe in municipal heating pipe system; Municipal water supplying and drainage pipeline; Oil and gas pipeline; Pipe joints of plastic drainage water pipes, PU foam insulation pipelines, 2PE/3PE oil and gas pipelines;

Besides manufacturing machines, we also make Heat shrinkable sleeves and electro fusion sleeves and plastic welders, which are widely used as pipe joints and sealings of plastic drainage water pipes, PU foam insulation pipelines, 2PE/3PE oil and gas pipelines;

4. Our certificates and Patents

5. Our Purpose and Market

Our purpose is to supply highest cost-effective products and the most suitable solutions to our clients, as well as intimate help and service, on this basis we reach a win-win situation.

For over 14years We have exported to many foreign countries, such as Russia, Iran, Turkey, U. A. E, Sudan, Ukraine, Uzbekistan, Azerbaijan, South Asia, Poland etc.

6. Guarantee and after service

The guarantee period is 12 months from the date of installing, but no more than 14 months from the date of delivery. After this period we are obliged to provide with lifelong service at the expense of Buyer.

During the warranty period we are responsible to provide trouble shootings and help the customer to solve the problems, provide spare parts which are broken, except breakings caused by the Buyer.

We will provide the technical service train the workers from the buyers for free.

We can also send technicians to the buyer's companies abroad for help installation and testing the lines. But the buyer shall pay for the round trip tickets, accommodation, transportation, medicine treatment and insurance of the technicians in foreign countries and some salary accordingly.