Tiger SS20 Corrosion-Resistant Chain Block (Stainless Steel Chain) – 500kg-20t WLL

Description

Built on decades of offshore lifting expertise, the Tiger SS20 Stainless Steel Chain Block represents the highest standard of corrosion-resistant manual hoist design. Engineered specifically for subsea lifting, marine maintenance, and offshore rig operations, this model combines a rugged steel construction with a fully corrosion-protected finish and stainless steel load chain to provide unmatched reliability in the harshest environments.

The SS20’s stainless steel chain conforms to EN818-7 and ISO 16872, offering superior strength, precision calibration, and total immunity to rust or surface degradation. Combined with Tiger’s C5M-grade protective coating system and bonded marine friction discs, the result is a hoist that delivers consistent performance whether topside, subsea, or in high-humidity environments.

Each unit undergoes multi-immersion testing and is verified for up to 54 days of subsea exposure under saltwater conditions when operated according to Tiger’s Multi-Immersion Instruction Manual. The result is a product trusted by the offshore energy, renewables, and marine engineering sectors worldwide.

Subsea-Ready Corrosion Protection
Every component of the SS20 Stainless Steel Chain Block is engineered to resist the long-term effects of saltwater, pressure, and mechanical wear. Key corrosion-resistant features include:
-Stainless Steel Load Chain: High-strength, corrosion-proof, and certified for subsea lifting.
-Phosphor-Bronze Bearings: Resist corrosion and wear in wet, marine environments.
-C5M Protective Coating (ISO 12944): Two-stage system with electroplated base and hard-wearing powder coat.
-Stainless Steel Fixtures & Fittings: Throughout for maximum durability and ease of inspection.
-Bonded Marine Friction Discs: Grooved design prevents aquaplaning and ensures consistent braking performance underwater.

Patented Safety Brake System
The SS20 incorporates Tiger’s Quad Cam Pawl Brake System, a patented design that guarantees full brake engagement even in the event of a pawl spring failure. This system ensures safe operation in all orientations including fleeting, drifting, and cross-hauling applications up to 60° from vertical, without deration.

The 8-point multi-start pinion shaft improves brake responsiveness by 100% compared to standard 4-point systems, providing fast reaction times and smooth, controlled load handling.

Overload Protection Option
Available with an integrated slipping clutch overload limiter, verified by DNV GL in accordance with NORSOK R-002. When overloaded, the clutch automatically slips to prevent lifting beyond capacity, protecting both operators and equipment while still allowing safe lowering of the load.

Multi-Immersion & Subsea Testing
Tiger’s SS20 range underwent extensive multi-immersion testing by ORE Catapult, replicating real-life subsea conditions. Results confirmed full operational reliability under repeated immersion cycles, leading to the SS20’s certification for subsea and splash zone applications.
Internal corrosion resistance testing achieved over 1500 hours in ASTM B117 salt spray conditions, proving its resilience against prolonged salt exposure.

ROV-Compatible Configurations
The SS20 Stainless Steel Chain Block is available in ROV-compatible variants for subsea intervention and maintenance. Interface options include:
-Hydraulic Hot Stab connection (Type A/B)
-Rotary Torque Receptacles (Classes 1, 2, & 3)
-Direct drive connections (D-Handle, T-bar, or Fishtail)
-QD Coupling options

Capacities range from 3t to 20t, available with single or multiple chain falls and project-specific heights of lift.

Performance and Testing
Each SS20 hoist undergoes comprehensive verification and proof testing:
-Proof Load: 1.5 × rated capacity
-Light Load Test: 2% of rated capacity
-Ultimate Strength: ≥ 4 × WLL
-Chain Anchorage: ≥ 2.5 × WLL without brake or gear restraint
-Continuous Cyclic Testing: > 1500 cycles

Every hoist is supplied with a Certificate of Conformity and Test Certificate per Machinery Directive 2006/42/EC.