High Output 3PE Pipe Coating line for Buried Pipelines with Induction Heating and Shot blasting

Steel Pipe FBE / 3LPE Anti-Corrosion Coating Line for Long-Distance Oil & Gas Pipelines

This High Output 3PE Pipe Coating Line is a fully automatic 3PE coating line purpose-engineered for factory-grade external anti-corrosion protection of steel pipes used in buried pipelines. Covering an ultra-wide 36–4200 mm diameter range, this steel pipe coating machine delivers one-pass 3LPE coating with medium-frequency induction heating for oil and gas transmission, municipal water supply, urban gas distribution and EPC infrastructure projects worldwide.

This professional pipe coating production line supports multiple external configurations, including single-layer FBE coating, 2LPE, 2LPP and 3-layer PE coating — the internationally recognized standard for buried pipeline corrosion protection under DIN 30670, BS EN 10329 and AWWA C215. One pipeline coating equipment investment can serve changing pipe specifications across different contract phases.

The complete 3LPE coating plant integrates external shot blasting and derusting (Sa2.5), medium-frequency induction heating (±2 °C accuracy), electrostatic FBE epoxy powder spraying, hot-melt adhesive extrusion, outer PE cladding, water spray cooling, pipe end beveling, a zero-emission powder recovery system and full PLC automatic control. It realizes one-time synchronous forming of the FBE base, adhesive middle layer and 3LPE polyethylene protective layer at ≤ 250 m²/h sustained capacity.

Fusion Bonded Epoxy (FBE) powder cures at high temperature on the Sa2.5 shot-blasted pipe surface into a dense, cross-linked protective structure. It provides strong adhesion, acid and alkali resistance and cathodic disbondment resistance — the key performance requirement for buried pipeline coating.

The hot-melt adhesive bonds with the uncured FBE powder and the outer polyethylene at the same time. This bridge layer ensures long-term delamination resistance of the finished 3LPE anti-corrosion coating in soil and groundwater conditions.

High-density polyethylene provides impact resistance, abrasion protection and a waterproof barrier against soil stress, completing the 3-layer PE coating system required by international pipeline standards.

• Built for Buried Pipelines: Delivers the complete 3LPE external protection that buried oil, gas and water pipelines need for decades of corrosion-free service.
• Medium-Frequency Induction Heating: ±2 °C temperature accuracy ensures uniform FBE melting and firm 3LPE adhesion while consuming less power than conventional heating methods.
• Sa2.5 Shot Blasting Surface Preparation: Integrated external shot blasting reaches Sa2.5 cleanliness, the mandatory surface grade for FBE and 3LPE coating adhesion.
• Ultra-Wide 36–4200 mm Coverage: One steel pipe coating machine handles small-bore gathering lines through large-diameter transmission pipelines.
• ≤ 250 m²/h High-Throughput Performance: Full PLC automatic control keeps high-volume pipe coating contracts on schedule with stable coating thickness.
• Zero-Emission Environmental Compliance: Cyclone and pulse dust collectors with a powder recovery system comply with CE and ISO 14001 environmental standards.

Flexible to support single-layer FBE coating or composite 3LPE coating, and compatible with 2LPE and 2LPP configurations. This pipeline coating equipment adapts to oil and gas transmission, municipal water supply, urban gas networks, offshore pipeline construction and large EPC infrastructure projects across the full 36–4200 mm diameter range.

The induction heating system reaches ±2 °C accuracy with lower power consumption, ensuring uniform FBE powder melting and firm 3LPE adhesion. An adjustable spiral conveyor speed (0–6 m/min) fits every pipe diameter, keeping stable ≤ 250 m²/h capacity and consistent coating quality throughout continuous pipe coating production line runs.

The professional cyclone and pulse dust collector with zero-emission powder recovery is fully compliant with CE and ISO 14001 environmental standards. Zero dust pollution meets global factory requirements and supports green manufacturing for international EPC projects.

We have completed 50+ steel pipe coating line projects at home and abroad, with equipment installed and operating in oil and gas, municipal water supply and EPC infrastructure projects across Russia, Iran, the United Arab Emirates, India, Belarus, Kazakhstan and more.

Qingdao Huashida Machinery Co., Ltd. was established in 2003. For over 20 years, Huashida has focused on the R&D and production of 3PE steel pipe anti-corrosion coating lines, steel pipe FBE / 2LPE / 3LPE coating production systems, polyurethane insulation pipe production lines, large-diameter underground pipeline equipment and plastic pipe fitting production machinery. We maintain long-term technical cooperation with Tsinghua University, Beijing University of Chemical Technology, South China University of Technology and other national research institutions. By integrating advanced global technologies and international standards, we have become one of the top 3 pipeline coating machinery manufacturers in the Chinese industry.