European Market 3LPE Coating Line to DIN 30670 DN114-1220 mm
Overview
Selling a coating line into Europe is less about the diameter band and more about evidence. DIN 30670 sets out what a three layer polyethylene coating has to be; it does not by itself satisfy a European plant, because their own quality system requires the machine to demonstrate that the coating on every pipe met the specification. That shifts the design emphasis towards instrumentation, recording and repeatability. Temperature is measured and recorded on the pipe. Blast profile is measured and recorded per pipe. Coating thickness and holiday test results are recorded per pipe. The batch record is exportable in a form the plant's own system can accept. There is a second layer to this, which is machine compliance. A coating line delivered into the EU normally needs its own technical file, risk assessment and CE marking, and a European safety audit of the machine is common. The third practical point is environmental. Dust emission from blasting and discharge from the water circuit are quoted against the local limits that apply at the buyer's site rather than against a general figure, because those limits vary and a late change is expensive. The configuration described here is arranged so the machine can be audited rather than merely described.
Key Configuration
Blast chamber with two 75 kW wheels, abrasive recycling and three-stage dust collection, with extraction quoted against the local emission limit. Profile measurement after blasting with results logged per pipe. Induction heater in the 500 to 750 kW band with liquid-cooled power unit and closed-loop surface temperature measurement. Twin extruders at 1,800 kg/h with a dedicated adhesive head and a 1000 mm T-die, screw and barrel in 38CrMoAlA nitrided 0.4 to 0.7 mm above HV 740. Gun array with redundant positions and cartridge recovery, with recovery rate above 95 per cent. Water spray cooling with recycle and a closed treatment stage. Well-known brand PLC and HMI with an exportable batch record format, and the machine supplied with a technical file, risk assessment and CE marking.
| Item |
Parameter |
| Model / Type |
3LPE Coating Line for European DIN 30670 three layer polyethylene work |
| Pipe Diameter Range |
DN114-1220 mm (4 to 48 inch) |
| Typical Specification |
three layer polyethylene to DIN 30670, with project specification variants |
| Primary Reference Standard |
DIN 30670 for external three layer polyethylene coating |
| Surface Preparation Standard |
ISO 8501-1, with profile measured and recorded per pipe |
| Certificates |
EN 10204 type 3.1 material certificates for pressure-bearing and structural parts |
| Third Party Inspection |
line prepared for inspection by an appointed inspection body |
| Factory Production Control |
documented process control with traceable settings per batch |
| Machine Compliance |
CE marked machinery with risk assessment and technical file |
| Pipe Length |
6-18 m |
| Pipe Wall Thickness |
4 to 20 mm |
| Coating Capacity |
up to 550 m²/h |
| Heating |
intermediate frequency induction, 500 kW to 750 kW class |
| Extruder |
2 x 1,800 kg/h with dedicated adhesive head and 1000 mm T-die |
| Spray Guns |
16 guns with four redundant positions and cartridge recovery |
| Powder Recovery |
95 percent or above with automatic filter cleaning |
| Cooling |
water spray with recycle and a closed water treatment stage |
| Dust Emission Control |
three-stage extraction quoted against local emission limits |
| PLC and HMI |
Well-known brand, batch records exportable for customer audit |
| Warranty |
12 months machine, 24 months drive train |
Main Equipment List and specification
| No. |
Name |
Specification |
| A. Surface Cleaning Equipment |
| 1 |
Steel pipe conveyor |
Adjustable speed and angle, pipe uploading and unloading controlled by PLC |
| 2 |
Shot blasting machine |
|
| 3 |
Cyclone dust collector |
High efficient downwind cyclone dust removal |
| 4 |
Impulse cartridge dust collector |
|
| 5 |
Centrifugal fan |
|
| 6 |
PLC control system |
Automatic control of the line |
| B. Coating Equipment |
| 1 |
Spiral pipe conveyor |
Adjustable speed and angle |
| 2 |
Induction heating machine |
|
| 3 |
Powder spraying device |
Spraying thickness 80-800μm |
| 4 |
Automatic feeder&dryer |
|
| 5 |
SJ-PE Extruder |
|
| 6 |
SJ-AD Extruder |
|
| 7 |
Adhesive extruder die mould |
High quality die steel |
| 8 |
PE sheet extruder die mold |
High quality die stee |
| 9 |
Adhesive/PE sheet coating device |
Pressing roller with silicon coating and internal cooling |
| 10 |
Environmental Protection Ventilation equipment |
|
| 11 |
Cooling Spray equipment |
|
| C.Platform Equipment |
| 1 |
Steel pipe platform |
High quality |
| D.Groove Equipment |
| 1 |
PE Beveling Machine |
Steel brush disk, |
| 2 |
Hydraulic Lifting and Turning Machinery |
For lifting and turning the pipe |
| 3 |
Hydraulic Equipment |
|
European buyers do not usually judge a coating line on a specification sheet. They judge it on whether the process control records will stand up to an audit.
DIN 30670 defines the coating. What the buyer adds on top is usually a requirement on how the machine demonstrates it has produced that coating on every pipe, not on average.
Machine compliance in Europe is a separate matter from coating compliance, and a line supplied into the EU normally needs its own technical file, risk assessment and CE marking.
Dust emission and water discharge are quoted against local limits rather than a general figure, because those limits differ between member states and are the common cause of a late change order.
Material traceability runs through the machine as well as the coating, so pressure-bearing and structural parts are supplied with certificates that match the audit trail the plant already keeps.
The anti-corrosion coating processing line includes:
-steel pipe transmission system
-Internal and external shot blasting system
-dust collection system
-pipe heating system
-electrostatic spraying system
-PE coating system
-water cooling system
-end cutting system
-hydraulic and pneumatic system
-testing system
-electronic control system
Pipe is received, identified and measured, and the first recorded values are diameter, wall thickness and pipe temperature. External shot blasting to Sa 2.5 or better follows, and the blast profile is measured and recorded per pipe rather than per batch, because profile is the property most easily lost and the one an auditor is most likely to sample. Purging and end masking follow with the cutback dimension recorded. Induction heating brings the surface into the coating window with the surface temperature measured on the pipe and logged with a timestamp. Epoxy powder, adhesive extrusion and polyethylene then follow in sequence, with the powder booth and extruder settings captured in the batch record. Cooling uses a water spray circuit with a closed treatment stage, so that discharge is controlled rather than incidental. The coating is holiday tested and thickness gauged, and the finished pipe record includes blast profile, coating thickness, cutback, holiday result and the machine settings that produced them. The record is exportable, which is the point of the exercise, because that export file is what the plant's own quality system will be audited on.
1. Pipe diameter:114-1220mm (4-48 Inch)
2. Processing capacity: ≥250m2/h (can be customized up to 800m²/h )
3. Cleaning level: ≥Sa2.5
4. Materials for production: epoxy powder, adhesive, polyethylene
Standards Compliance
External three layer polyethylene coating follows DIN 30670, and where a project names its own specification instead, that specification governs. Surface preparation follows ISO 8501-1 and is measured after blasting. Material certificates follow EN 10204 type 3.1 for the relevant parts. Machinery for the European market is supplied with a technical file, risk assessment and CE marking. Where an inspection body is appointed by the buyer, the machine is prepared for that inspection rather than only for our own works test.
Applications
Buried transmission and distribution pipelines in European member states; district heating mains; water and wastewater mains; industrial piping in chemical and energy plants; pipe for utility replacement programmes; coating work under framework agreements with European utilities. Buyers are commonly established coating applicators who are adding capacity or replacing an older line, and the audit route inside their company usually decides the outcome of the tender. We therefore quote the instrumentation and the record format explicitly, since those are the two items most often underestimated at budget stage and most often the reason a project is delayed.
Service & Support
Site supervision by 2 to 3 engineers over 15 to 30 days, with commissioning and the documentation handover sequenced so the buyer's own audit can run in parallel. Training covers the recording regime as well as the machine operation, because on a European site the two are not separable. Documentation in English covers layout, foundation, electrical, PID, manuals, the machinery technical file and the batch record specification. Critical spares by air within 72 hours, with a recommended two-year holding. Machine warranty 12 months, drive train 24 months.
Why Choose Qingdao Huashida
We build three layer anti-corrosion lines to DIN 30670 as well as ISO 21809-1 and GB/T 23257, and the recording regime a European audit expects is part of how we already supply the line rather than an extra ordered later. Our anti-corrosion machinery has been recognised on the Shandong Province First-Set Technical Equipment list, and we operate pipeline coating companies of our own, so the process control records we design are ones we use in our own production.
---FAQ---
Q: Does the line come with CE marking?
A: Yes. A line supplied into the European market is provided with its own technical file and risk assessment and is CE marked as machinery, separately from the coating standard it applies.
Q: How is conformity to DIN 30670 demonstrated on each pipe?
A: By a recorded set of values per pipe: blast profile, pipe surface temperature at coating, coating thickness, cutback dimension and holiday test result. The record is exportable so the buyer's own quality system can hold it.
Q: Are material certificates supplied?
A: Yes, EN 10204 type 3.1 for the parts where it is relevant, which is what a European plant's own audit trail normally expects to receive.
Q: How are dust emission and water discharge handled?
A: The extraction and the water treatment stage are quoted against the local limits at your site rather than against a general figure, because those limits differ between member states.
Q: Can an appointed inspection body witness the tests?
A: Yes. The machine is prepared for third party inspection, and we plan the works test so an appointed inspector can attend without holding up shipment.
Q: What diameter range does the line cover?
A: DN114 mm to DN1220 mm, which is 4 inch to 48 inch, with wall thickness from 4 to 20 mm.
Q: Is the batch record format fixed?
A: The format is agreed at order stage so it can be accepted by your own system. It is one of the items we settle early, because changing a record format after delivery is more disruptive than it sounds.
Q: What crew and training does the line need?
A: Four operators per shift, with training covering the recording regime as well as operation, since on an audited site the two go together.
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