Steel Pipe External Surface Rust Removal and Anti-Corrosion Coating Line Equipment

Product Description

Steel Pipe External Surface Rust Removal and Anti-Corrosion Coating Line Equipment

Product Description

The Qingdao Huashida Steel Pipe External Surface Rust Removal and Anti-Corrosion Coating Line Equipment is designed to remove rust, mill scale and contaminants from the external surface of steel pipes, creating an anchor pattern for strong coating adhesion ;
apply multi-layer anti-corrosion coatings such as FBE, 2LPE/3LPE or 3PE, which can extend the pipe's service life from a few years up to 50 years ;
carry out the entire process-cleaning, heating, coating, curing and inspection-in one continuous, automated production line, ensuring uniform thickness and compliance with international standards .



The Qingdao Huashida Steel Pipe External Surface Rust Removal and Anti-Corrosion Coating Line Equipment guarantees coating uniformity through the following integrated technologies and process controls:
1.Closed-Loop Speed Control
A displacement closed-loop system based on HMI + PLC continuously monitors and adjusts the steel pipe's advance speed using laser displacement sensors. This keeps the pipe's travel speed constant, eliminating the ±30 % thickness variation typical of open-loop systems and reducing it to about ±10 % .
2.High-Precision Electrostatic Spraying
The line employs high-voltage electrostatic spray guns (≈ 100 kV) combined with fluidized-bed powder supply. This delivers an even cloud of epoxy powder that is uniformly attracted to the grounded pipe surface, ensuring a consistent coating thickness regardless of pipe ovality or minor diameter changes .
3.In-Line Thickness Gauging & Feedback
After spraying, non-contact ultrasonic or eddy-current thickness gauges scan the full pipe circumference. Real-time data are fed back to the PLC, which automatically adjusts gun voltage, powder flow and conveyor speed to correct any deviations .
4.Controlled Pre-Heat Temperature
Medium-frequency induction heaters raise the pipe surface to the exact target temperature (typically 180 - 230 °C for FBE). Uniform heating guarantees even powder gel time and flow, preventing thick or thin spots .
5.Synchronised Gun & Pipe Motion
For large-diameter or curved pipes, a coaxial rotating winding device keeps the spray guns at a constant stand-off distance and relative speed, maintaining uniform coverage over elbows or reducers .
Together, these measures ensure that every square centimetre of the pipe receives a coating thickness within ±10 % of specification, meeting ISO 21809, DIN 30670 or customer-specific requirements.

Qingdao Huashida's line copes with **any diameter from Φ48 mm up to Φ2 500 mm (and even 4 200 mm on the large-pipe version)** through a set of quick-change, self-centering modules:

1. Expandable-centre roller conveyors
• Driven rollers whose centres open/close hydraulically in seconds, so the pipe axis always remains on the same height and centre-line regardless of OD .
• A single operator can change sizes in < 3 min; no manual shimming or spacer blocks.

2. Variable-blast rooms & spray booths
• The shot-blast chamber has vertically and horizontally adjustable blast wheels; wheel positions follow the new diameter automatically after the operator keys it into the HMI .
• The epoxy-powder spray ring uses motorised telescopic arms that keep the gun-to-surface distance constant (≈ 150 mm) for pipes from 48 mm to 2 500 mm.

3. Induction-heating coil sizing
• Medium-frequency coils are built in split, spring-loaded segments; the coil diameter is motor-adjusted to sit 20-30 mm clear of the new pipe surface, ensuring uniform pre-heat .

4. Software recipe management
• Once a pipe spec (diameter, wall, coating type) is selected, the PLC downloads the matching roller spacing, blast-wheel angle, gun pattern, line speed and coil power settings, guaranteeing repeatability.

Thus the same production line can run small 2-inch line pipe today and 100-inch offshore trunk pipe tomorrow without mechanical re-builds, only parameter recall and a quick roller/coil adjustment .



production line technical parameters
1.Pipe upload flatform
2.Pipe upload flatform
3. hydraulic station
4.Derusting spiral transmission line
5.Synchronous dynamic spiral single-frame
6.The lower type shot blasting machine
7.Dedusting system
8.transition platform line
9.PE Spiral transmission line
10.Intermediate frequency heater
11.Dynamic high temperature roller
12.Epoxy powder coating system
13.The powder room, vulcanization barrel
14.two stage powder recovery device
15.Automatic vacuum feeding machine
16.SJ-180/30 Extruder
17.SJ-65/30 extruder
18.Extruder moving mechanism
19.Hot melt extrusion die head
20.PE sheet extrusion die mould
21.Hot melt adhesive PE coating device
22.Environmental protection ventilation system
23.cooling spray system
24.The cooling splash-prevented plastic curtain-wall
25.The cooling splash-prevented plastic curtain-wall
26.Pipe beveling grinding machine
27.Dedusting system
28.Hydraulic lifting rotary pipe device
29.The electrical control system of 3PE steel pipes production line

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Our main products are: (Click this link to view the details page)

1. HDPE Jacket Pipe extrusion line

1. 3LPE steel pipe anti-corrosion coating line
2. Hollow wall spiral pipe production line
3. PE PP Geo membrane production line
4. XPS foam board production line
5. PE PP sheet board extrusion line 6.
6. Rubber foam insulation pipe production line

1. Radiation cross-linked PE heat shrinkable sleeve

1. Electro fusion sleeve

1. Portable hand extrusion welder
   After Sales Service
   
   

Quality warranty
The mechanical part's warranty:12 months from the date of consignee received the bill of lading,
The electric appliance's warranty: 6 months.rom the date of consignee received the bill of lading,
Service
Seller provide the technical service with free, and training the workers of buyers.
Installation and testing The seller can send enough technicians to the buyer's company for installation and testing the lines. The round trip ticket, accommodation, transportation, medicine treatment and insurance caused by the seller's expert in buyer's country and 150 US dollars per person per day will be covered by the buyer.

Packaging & Shipping

Company Profile

Our factory Huashida has been established since 2003, and we have been exporting equipment for more than ten years, providing pipe insulation and anticorrosion production line equipment for customers from various countries.

Exhibition

1. company profile

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. 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.

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. Global 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. Core Team

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.