Product Catalog Selection • Series 01
Precision Fastening & Mounting Components
Engineered hardware certified for extreme tensile load requirements, temporary formwork positioning, and structural renewable mounting.
Executive Engineering Brief
The Paradigm Shift to Removable Anchor Bolts in Heavy Civil & Energy Projects
Traditional cast-in-place and permanently grouted anchor bolts create persistent bottlenecks in modular construction, heavy machine repowering, and temporary retaining works. Removable anchor bolts redefine post-installed structural anchoring.
Non-Destructive Extraction
Unlike wedge or chemical capsule anchors that require torches or surface-level grinding when equipment is decommissioned, high-tensile removable screw and sleeve anchors back out completely, leaving an intact borehole ready for core plugging or re-threading.
Immediate Full Load Transfer
Eliminate chemical cure delays. Modern mechanical thread-cutting and undercut removable bolts lock into cracked and non-cracked concrete immediately, permitting full structural loading instantly after torque application without temperature sensitivity.
Total Lifecycle Economy
For modular solar racking foundations, wind turbine test rigs, precast formwork bracing, and factory robotic rails, removable anchor assemblies lower structural turnover costs by over 45% through multi-cycle component reusability.
Supply Chain Supremacy
China Factory Advantages & Handan Yongnian Manufacturing Ecosystem
Located at the nucleus of the global industrial fastener supply network, Handan Youlong Fastener leverages systemic cluster benefits to deliver aerospace-precision anchoring at unmatched volume scale.
Direct Upstream Metallurgy
Proximity to premier Hebei steel mills provides immediate access to certified alloy billets (40Cr, 35CrMo, B7, SS304/316) with documented melt trace records, eliminating intermediate logistics surcharges.
High-Speed Cold & Hot Forging
Equipped with 6-station multi-stage cold formers and heavy-duty induction hot-forging presses, handling anchor diameters from M6 up to M64 with precise thread-rolling tolerances.
Advanced Surface Formulations
In-house computerized hot-dip galvanizing (HDG ≥85μm), zinc-nickel plating, mechanical sherardizing, and multi-layer Dacromet/Geomet anti-corrosion lines reaching 1500+ hours salt spray resistance.
Freight & Export Velocity
Strategically positioned near Tianjin and Qingdao ports with dedicated freight corridors. We load full container loads (FCL) within short cycles, backed by comprehensive Mill Test Certificates (EN 10204 3.1).
300,000+
Metric Tonnes Shipped
100+
Global EPC Clients Served
1,500+ hrs
Salt Spray Resistance (ISO 9227)
Grade 12.9
Highest Tensile Capacity Available
Standardization & Engineering Matrix
Removable Heavy-Duty Concrete Fastener Specification Matrix
Compare mechanical mechanisms, base substrate compatibility, and international compliance criteria.
| Anchor Classification | Material / Grade Options | Typical Pull-Out / Shear | Corrosion Protection | Key International Standard |
|---|---|---|---|---|
| Heavy-Duty Concrete Screw Anchor (Removable) | Carbon Steel Heat-Treated / SS316 | High Tensile (Up to 85 kN depending on diameter) | Zinc Flake / Ruspert 1000h | ETA Option 1 (Cracked Concrete), ACI 318 |
| Removable Undercut Concrete Sleeve Anchor | Class 8.8 / 10.9 / 12.9 Alloy Steel | Ultra-Heavy (120 kN+ dynamic seismic load) | Hot-Dip Galv (≥65μm) | ISO 898-1, ICC-ES AC193 |
| Internal Thread Drop-In Removable Stud System | AISI 304 (A2-70) / AISI 316 (A4-80) | Medium to Heavy Static Fixture Loading | Passivated Stainless | DIN 7952, EN 14592 |
| Expanding Fish-Scale Reusable Foundation Bolt | Q235B / 45# High Tensile Carbon Steel | High Friction Mechanical Wedging | Mechanical Sherardized | GB/T 5782, ASTM F1554 Equivalent |
Macro Sector Implementation
Cross-Industry Engineering Deployments
How global EPC leaders, utility contractors, and equipment manufacturers integrate removable anchor technologies.
Utility Solar PV & BIPV Foundations
Mounting tracker posts and inverter stations directly onto ballast concrete blocks with removable anchors allows easy re-leveling after initial ground subsidence without destroying concrete footings.
Industrial Automation & Heavy Machinery
Fast-moving robotics lines and stamping dies require reconfigurable floor positioning. Removable sleeve anchor bolts permit floor realignment and facility retrofitting with zero projecting hazards.
Offshore, Wind Turbine & Coastal Works
Fabricated in SS316 or custom zinc-flake formulations, these fasteners withstand aggressive C4/C5 marine atmospheric corrosion while anchoring heavy cable trays and modular gantry brackets.
Procurement Leadership Strategy
Meeting Modern Global Sourcing Standards
Supply chain security, technical traceability, and ESG compliance are non-negotiable prerequisites for multinational procurement divisions.
Full Batch Traceability
Every shipment is accompanied by raw steel heat numbers, spectrographic chemical breakdowns, Charpy impact toughness ratings, and tensile-yield certificates for critical structural liability defense.
OEM Tooling & Custom Geometry
From unique hexagonal flange profiles and customized thread pitches to integrated anti-vibration serrations, our engineering workshop produces bespoke tooling within 7–12 days.
Palletized Sea-Worthy Packaging
Reinforced double-corrugated outer cartons, waterproof inner plastic sealing, and fumigated solid wooden pallets prevent transit damage and moisture intrusion during long ocean voyages.
Engineering Knowledge Base
Frequently Asked Questions (FAQ)
Essential guidance on specification, installation, and inspection of removable anchoring hardware.
How many times can a removable anchor bolt be re-used?
Reusability depends on whether the fastener is a concrete-cutting screw or a mechanical expansion sleeve. Thread-cutting screw anchors require thread-wear gauges before reuse to ensure the cutting teeth maintain required diameter. Expansion sleeve and internally threaded anchors can typically be reused indefinitely by replacing the outer expanding collar or inner set screw.
What is the key difference between wedge anchors and removable screw anchors?
Traditional wedge anchors rely on permanent frictional deformation of a clip inside the concrete, meaning extraction requires cutting the exposed stud flush with the concrete. Removable screw anchors tap directly into concrete via continuous helical threads, distributing loads evenly without outward expansion stress and allowing complete, clean removal with an impact wrench.
Can removable concrete anchors be installed near slab edges?
Yes. Because thread-cutting removable anchors induce significantly lower radial bursting stress compared to mechanical wedge expansion anchors, they allow significantly reduced center-to-center spacing and smaller minimum edge distances (c_min) without causing edge spalling.
How does Handan Youlong ensure batch-to-batch thread consistency?
Our workshop utilizes automated high-precision circular thread-rolling equipment equipped with laser diameter monitors. Every batch undergoes strict go/no-go plug gauge verification, optical sorting, and destructive tensile testing according to ISO 898-1 and ASTM standards before passing final QC clearance.
Product Catalog Selection • Series 02
Structural Anchors, Brackets & Industrial Socket Assemblies
Explore heavy-duty expansion hardware, specialized PV angle connectors, and high-tensile carbon and stainless bolt systems direct from our Handan plant.
