From warship frigates to the Shenzhen–Zhongshan Link and zero-deformation thin plates
Technology & Milestones
02 · Technology creed
Perfect surfaces to IACS standards
Sa 2.5 cleanliness. Per ISO 8501-1, removal of oxide scale, rust and old coatings reaches over 97%, with salt residue at extremely low levels — eliminating coating blistering and cathodic disbondment risks.
30–75 μm roughness. Precise control of shot flow and ejection velocity forms an ideal anchor profile, providing the mechanical interlocking structure epoxy primers require.
20–35 μm shop primer thickness. Uniform adhesion forms a tough film barrier blocking chloride ions and moisture, resisting marine atmosphere and splash-zone erosion for 30+ years.
Process control · Inspection & verification. Every critical process is inspected, and each delivery is commissioned and optimised on site.
01 · Verified performance
Every commitment is measurable
Cleanliness, roughness, deformation control, delivery cycle and service life — verified on delivered projects, not promised on paper.
≥ Sa 2.5–3.0Surface cleanliness
30–75 μmRoughness control
Zero deformationThin plate 3–5 mm
100% inspectionCritical processes
Core strengths
Military-grade quality & extreme delivery
Oxide scale & rust removal rate above 99.99% — meets Type 052 / 054 missile frigate requirements.
| Core indicator | Dingtian standard | Industry average |
|---|---|---|
| Surface cleanliness | ≥ Sa 2.5–3.0 | Sa 2.0 |
| Roughness control | 30–75 μm | 40–100 μm |
| Thin plate deformation (3–5 mm) | ZERO DEFORMATION | ≤ 0.5 mm/m |
| Project delivery cycle | 130 days (avg.) | 220 days |
| Equipment service life | ≥ 30 years | 20–25 years |
International certifications: CCS (China) · RINA (Italy) · Lloyd's Register LR (UK) · IACS member rules compliance. Full lifecycle service covers delivery, commissioning, process optimization, spare parts & upgrades, with 100% inspection at critical processes.
02 · Core technology milestones
2007 · Breaking the state monopoly with military standards
Extreme delivery verifies execution. The Huangpu Wenchong project was completed in just 150 days — Type 052 / 054 frigate pretreatment lines delivered through parallel engineering and modular design, 40% faster than the industry average.
Military-grade standards fully met. Surface cleanliness ≥ Sa 2.5 and roughness precisely controlled at 30–75 μm, ensuring long-term combat readiness of naval vessels in harsh marine environments.
Monopoly broken, a new era opened. First private-enterprise shot blasting pretreatment equipment entering a state-owned military shipyard, ending decades of reliance on imported or state-owned equipment.
Strategic transformation foundation. Established a military-grade quality management system, laying the technical foundation for expansion into offshore engineering, commercial shipbuilding and diversified sectors.
02 · Core technology milestones
2015 · Forging the backbone of the Shenzhen–Zhongshan Link
120-day extreme delivery. For the Zubr-class LCAC air-cushioned landing craft, custom shot blasting parameters and flexible support schemes achieved zero surface defects under high airtightness requirements.
International military certification. Equipment passed rigorous acceptance by the Ukrainian Navy technical expert team, proving international advanced level in high-end marine pretreatment equipment.
Cross-sector value leap. Steel plates processed by the line were applied to the Shenzhen–Zhongshan Link undersea tunnel, offshore drilling platforms and large dredgers.
Harsh environment reliability. In the extreme corrosion environment of Lingding Bay, the 30–75 μm anchor profile guarantees coating toughness and a 50-year design life for the structures.
02 · Core technology milestones
2018 · Zero deformation of thin steel plates
China's first thin-plate line. Independently developed 3.5-meter-wide thin-plate shot blasting pretreatment line at Guangzhou Shipyard International (GSI), with special design and dynamic pressure balancing technology.
Verified zero deformation. 3–5 mm thin plates verified at zero deformation after blasting, meeting luxury Ro-Pax requirements for cabin wall panels and deck plates to IACS standards.
European market breakthrough. Applied to the shot blasting pretreatment of ship steel plates for Italy's GNV series, UK's P&O battery-hybrid ferries, and Italy's MOBY Line.
Monopoly broken, leadership gained. Filled the domestic technology gap and broke the long-standing European monopoly, upgrading from import substitution to exporting into premium markets.
Product portfolio
Complete matrix of shot blasting & sandblasting solutions
A complete matrix of surface treatment equipment — from continuous pass-through lines for shipyards and steel structures to hook-type, overhead conveyor and crawler-type machines for castings, forgings and welded assemblies.
Steel plate & section pretreatment line. Continuous pass-through line with 3–5 m working width, integrating preheating, shot blasting, painting and drying — one-stop surface treatment for shipbuilding and steel structures. Preheat → blast → paint. Continuous pretreatment line · In operation.
Hook-type & overhead conveyor machines. Hook-type units deliver full-angle cleaning for heavy castings and welded structures; overhead conveyor systems automate continuous processing of chassis, axles and engineering machinery — automated flow for high-volume production.
Crawler-type shot blasting machine. Batch processing for small castings, forgings and stampings with automatic loading and tumbling — compact footprint and short payback for high-volume automotive parts. Complete product matrix for all work piece types.
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