application

Application Challenge: Meeting stringent seismic safety requirements for the bolted connections in a multi-story prefabricated steel building, necessitating both high strength and ductility.

HaoSheng Solution: Supplied a complete set of high-strength structural bolts (A325/A490 equivalents), heavy hex nuts, and hardened washers. The fasteners underwent rigorous testing to guarantee consistent clamp force and performance, contributing to the overall structural resilience and compliance with national building codes.

Application Challenge: Providing long-term reliable connection and foundation anchoring solutions for tracker or fixed-tilt support systems in large-scale ground-mounted solar farms. Fasteners must operate continuously for over 25 years in harsh outdoor environments (exposure to sun, rain, snow, sand, and salt spray), possessing exceptional corrosion resistance, UV aging resistance, and the ability to withstand long-term fatigue stress from dynamic loads like wind and snow.

HaoSheng Solution: Supplied a "PV Mounting-Specific Fastener Kit" consisting of U-bolts, clamp bolts, anchor bolts, and matching lock nuts made from hot-dip galvanized steel (compliant with ISO 1461) or aluminum-magnesium alloy. For coastal or highly corrosive environments, a higher-grade stainless steel option (e.g., A4-70/A4-80) is offered. All products undergo rigorous salt spray testing and mechanical property testing to ensure superior weather resistance and stable clamping force, effectively preventing connection failure due to corrosion or vibration, thereby safeguarding the structural integrity and power generation efficiency of the PV array throughout its entire lifecycle.

Application Challenge: Securing critical components (like crawler assemblies and bucket joints) on large mining excavators that face extreme shock loads, vibrations, and abrasive conditions.

HaoSheng Solution: Provided custom-designed, grade 10.9 and 12.9 alloy steel bolts and nuts with premium surface coatings (e.g., zinc flake). These fasteners offer superior tensile strength, fatigue resistance, and corrosion protection, ensuring joint integrity and safety in the harshest operating environments.

Application Challenge: Addressing the connection of massive flanges on wind turbine tower sections at heights over 100 meters. Fasteners must withstand tremendous tensile, shear, and cyclic loads while offering ultra-long-term anti-loosening and weather-resistant performance.

HaoSheng Solution: Supplied oversized (e.g., M36-M64) Grade 10.9 high-strength pre-stressed bolts, thick heavy hex nuts, and heavy-duty washer sets. Products undergo special quenched and tempered heat treatment and long-lasting anti-corrosion coating. Professional guidance on hydraulic tensioning procedures is also provided to ensure the joint maintains stable clamping force over its 20+ year design life.