Good Price G60 High Test Fishing Chain For Aquaclture
| Diameter |
Dimensions |
Uint Weight |
MBL |
| mm |
D |
L |
W |
kg/meter |
KN |
| 30 |
30 |
120 |
45 |
18.9 |
467 |
| 32 |
32 |
128 |
48 |
21.43 |
531.2 |
| 36 |
36 |
144 |
54 |
27 |
672.3 |
| 38 |
38 |
152 |
57 |
29.9 |
748.7 |
| 40 |
40 |
160 |
60 |
34.6 |
829.1 |
| 48 |
48 |
192 |
72 |
49.3 |
1195.6 |
| Diameter |
Dimensions |
WEIGHT |
MBL |
| mm |
d |
L |
W |
KG/M |
KN |
| 13 |
13 |
80 |
26 |
2.98 |
155 |
| 16 |
16 |
100 |
26 |
4.5 |
235 |
| 19 |
19 |
100 |
28 |
6.5 |
333 |
| 22 |
22 |
120 |
37 |
8.7 |
447 |
I. Application Scenarios and Core Requirements
-
Deep-Sea Cage Mooring Systems
- Function: Anchor cages to withstand ocean currents, waves, and typhoon impacts, preventing drift or structural damage.
- Challenges: Long-term immersion in high-salinity seawater, biofouling, and dynamic loads (cyclic tension variations).
- Key Metrics: Tensile strength (≥800 MPa), corrosion resistance, fatigue resistance.
-
Small Fishing Vessel Net Release and Emergency Use
- Function: Rapid disentanglement from nets or emergency towing to avoid hull damage.
- Challenges: Instantaneous shock loads, wear from frequent operations, and quick-release demands.
- Key Metrics: Breaking strength (2-3× vessel tonnage safety factor), lightweight design, abrasion resistance.
II. Technical Selection and Design Considerations
1. Material Selection
- Recommended Materials:
- 316L Stainless Steel: Ideal for highly corrosive environments (e.g., deep sea) but costly.
- Hot-Dip Galvanized Carbon Steel: Cost-effective; requires periodic coating inspections.
- Alloy Steel (e.g., Grade 80/100): Ultra-high strength for extreme loads.
- Corrosion Protection: Galvanization, epoxy coatings, or PVC/PE sheathing to extend lifespan and reduce biofouling.
2. Structural Design
- Chain Link Types:
- Short-Link Chains: Compact, high tensile strength, suitable for fixed mooring.
- Long-Link Chains: Greater flexibility for dynamic load scenarios.
- Accessories:
- Swivels: Prevent twisting and reduce stress concentration.
- Shackles: Enable quick connections; ensure material compatibility with chain grade.
- Quick-Release Hooks: Critical for small vessels; prioritize single-handed operability.
3. Strength and Specification Matching
- Deep-Sea Cages: Select chain diameter (20-50 mm) based on cage size, depth, and current speed. Breaking strength typically ranges from 200-1,000 tons (e.g., 30 mm Grade 80 chain: ~630 tons).
- Small Vessels: Match chain diameter (12-20 mm) to vessel tonnage (e.g., 10-ton vessel requires ≥30-ton breaking strength).
4. Installation and Maintenance
- Pre-Stretching: New chains should undergo pre-tensioning to eliminate manufacturing stress.
- Inspections:
- Visual Checks: Look for deformation, rust, or cracks.
- Non-Destructive Testing (NDT): Magnetic particle or ultrasonic testing every 2 years.
- Maintenance: Rinse with freshwater to remove salt; apply anti-corrosion grease (e.g., lithium-based).
III. Industry Standards and Certifications
- International Standards:
- ISO 1704: Specifications for ship anchor chains (materials and testing).
- ASTM A975: Standards for galvanized steel chain strength and coating thickness.
- Certifications: Prioritize products certified by DNV-GL, ABS, or equivalent marine classification societies.
IV. Cost Optimization and Alternatives
- Hybrid Systems: Combine high-strength alloy steel for primary mooring with galvanized carbon steel for secondary chains.
- Local Reinforcement: Add wear-resistant sleeves or enlarge links at stress points (e.g., connections).
- Recycled Materials: Some manufacturers offer remanufactured chains (30-50% cost reduction); verify performance consistency.
V. Case Studies
- Norwegian Deep-Sea Salmon Farms: Use 40 mm Grade 100 alloy chains with polyethylene sheathing, designed for 15-year service life, resisting 1.5 m/s currents.
- Southeast Asian Small Fishing Vessels: Deploy 16 mm galvanized chains with quick-release hooks (40-ton breaking strength) for 10-ton vessels.
VI. Recommendations
- Deep-Sea Priority: 316L stainless steel or Grade 80 alloy chains (≥30 mm diameter) with swivels and shackles; conduct regular NDT.
- Small Vessels: Hot-dip galvanized carbon steel (12-20 mm diameter) with quick-release mechanisms; inspect quarterly.
- Innovation: Smart chains with embedded sensors (real-time load/corrosion monitoring) for high-value aquaculture projects.
Proper selection and maintenance of fishery chains enhance operational safety, extend service life, and reduce long-term costs.
Ql.Why choose Our Company?
A: We have advanced equipment, an excellent production team, strict quality control, Welcome to visit the factory to confirm
02.Can you accept a sample order?
A: Yes, It is acceptable! We can provide samples for quality inspection
Q3. Can you give me a better price?
A: First, we are a Manufacturer in China. If you have a big demand for a certain quantity, we can offer discounted prices. Please contact us to get some discounts
Q4. Which delivery methods are available?
A: By sea or air.
Q5. How can I place an order?
A: Please provide your reguirements or application and send us an order byE-mail with your detailed information, then we willsend you a PI to confrm Then,,if all information is right you can make a 30% deposit payment. Finally, we will arrange the order as soon as we receive your advance payment!
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