Offshore Solar Heavy Frame Line in China

Illustration notice. Process illustrations are not verified photographs of this installation.

Project reference basis. Figures and configuration details are reported in the supplied project brief. They are reference values for the stated application, rather than verified acceptance results or a guarantee for another installation. Confirm the source records, material, tooling, operating schedule and test method when assessing a comparable project.

Project brief for review. The supplied document describes this configuration and reports the outcomes below. Original acceptance records, test reports and media are not attached to this import; attribution and outcomes require verification before publication.

The supplied brief describes the following project context.

A national clean energy nuclear corporation developing marine offshore solar in Shandong deployed Haifeng’s specialized offshore composite framing direct injection equipment. The project was commissioned to supply heavy structural pultruded frames for an experimental 50 MW offshore floating photovoltaic array deployed in the open waters of the Yellow Sea.

Prior to the deployment, the operator evaluated standard anodized 6063-T6 aluminum frames. Within 14 months of marine deployment, intense salt-spray deposition and galvanic interaction with stainless steel mounting brackets caused severe pitting corrosion and structural bracket loosening under 4-meter wave surges. Insulation resistance dropped precipitously, triggering repeated system shutdowns and high offshore vessel maintenance costs.

Haifeng supplied an integrated marine pultrusion injection package centered on the HF-PVI80-MAR platform. Featuring sealed nitrogen blanketing, Hastelloy fluid circuits, and high-pressure closed-die wet-out, the line manufactured heavy-wall composite frames with a reported high fiber fraction whose weight/volume basis requires confirmation with a reported long-duration salt-spray benchmark; exposure dates and strength-versus-modulus retention remain unreconciled.

Review point: A January 2026 implementation cannot establish a completed 12-month offshore follow-up by October 2026. A 9,000-hour continuous exposure is 375 days and its start/end dates must be supplied. Burn-off resin loss is not directly a fiber-volume measurement; strength retention and modulus retention differ.

Reported equipment configuration from the supplied brief:

Haifeng engineered and commissioned an ultra-reliable closed direct-injection pultrusion line customized for harsh coastal plant operations. Raw materials—specialized low-hydrolysis polyols and polymeric isocyanates—are stored in twin 200 L 316L stainless vessels maintained under a 0.05 MPa positive dry nitrogen blanket, stripping atmospheric moisture to prevent micro-foaming.

Chemical components are metered at 14.5 MPa by axial piston pumps equipped with corrosion-resistant Hastelloy fluid ends, holding mix ratios within ±0.2% via continuous Coriolis mass flow measurement. The chemicals impinge inside an automated mixing head and discharge straight into the sealed injection box of a heavy-wall pultrusion die.

The formulation saturates dense bundles of continuous corrosion-resistant E-CR glass rovings under 1.8 MPa internal die cavity backpressure. Multi-zone electric die heaters (160°C to 195°C) complete polymer crosslinking in-mold, regulated by embedded real-time gel-time sensors to eliminate resin stalling. The exiting 3.5 mm thick composite frames pass through synchronized caterpillar haul-offs at 1.0 m/min to flying carbide saws, producing bolt-ready framing profiles with zero galvanic corrosion potential.

A January 2026 implementation cannot establish a completed 12-month offshore follow-up by October 2026. A 9,000-hour continuous exposure is 375 days and its start/end dates must be supplied. Burn-off resin loss is not directly a fiber-volume measurement; strength retention and modulus retention differ.