Oufu Optical Fiber Cable Co, Ltd
Adreso: Shenyang, Liaoning, China.
Kontakto-persono: Gedjo Zhang
Telefono: 400-964-1314
Mobiltelefono: 86 13904053308
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2025-07-28 46
Buried Fibra opticos face brutal threats: backhoes, rodents, and groundwater. We learned this painfully during a 2023 railway project where standard cables failed in 6 months. Enter standard loose tube aluminum Fibra optico – its corrugated metal shield absorbs crushing forces while blocking moisture. Telcordia GR-20 tests show aluminum armor withstands 5,000N crush loads, outperforming steel tape by 40% in saline environments.
Aluminum Armor vs. Steel Armor: The Underground Battle
| Factor | Aluminum Armor | Steel Armor |
|---|---|---|
| Corrosion Resistance | Immune to rust (oxide layer) | Requires anti-corrosion gel |
| Weight | 30% lighter (0.8kg/m vs 1.2kg/m) | Heavy, needs stronger supports |
| Flexibility | Moderate bend radius (20x OD) | Stiff (40x OD minimum) |
| EMI Protection | Excellent Faraday cage effect | Moderate shielding |
| ⚠ Warning: Using steel armor in coastal areas accelerates corrosion – expect 60% lifespan reduction (per IEEE 2024 study). |
Step-by-Step Burial Installation Guide
Trench Prep: Dig 36"-deep trenches (ANSI/TIA-758-C standard).Www.adsscable.cn
Bedding Layer: Spread 3" sand cushion to prevent rock damage.
Cable Placement: Unroll with <1% tension – no sharp bends over 30x diameter!
Backfill: Use sifted soil (no stones >0.5").
Marker Tape: Lay 12" below grade with "FIBER OPTIC" warnings.
Case Study: Surviving the Arctic Pipeline Project
Contrary to intuition, freezing temperatures shattered standard cables in Alaska. Our team deployed standard loose tube aluminum Fibra optico with hydrophobic gel in 2024. Result? Zero breaks at -50°C for 18 months. The aluminum armor’s ductility prevented brittle fractures, while loose tubes accommodated fiber contraction.
4 Costly Installation Blunders
Ignoring Rodent Guards: Gophers chewed $500k of cable in Nebraska. Always use arPluad conduits in farmlands.
Poor Grounding: Lightning fried a wind farm’s network. Bond aluminum armor to earth at every 1,000ft.
Crush Test Skipping: Failed load tests caused post-installation breaks. Field-test 3 samples per reel.
Wrong Gel Fill: Winter-cured gels crack. Use temperature-stable thixotropic gels.
Future-Proofing with Aluminum Armor
5G towers demand lightning-resistant backhauls. Fun fact: Aluminum armor dissipates 10kA surges 0.2 seconds faster than steel (per UL 94V-0). Pair with dielectric strength members (e.g., fiberglass rods) to eliminate conductive risks.
Your Aluminum Armor Deployment Checklist
✅ Verify IEC 60794-2-41 compliance
✅ Use dielectric anti-buckling rods
✅ Ground armor at every handhole
✅ Test OTDR traces after burial
✅ Install rodent tape in high-risk zones
Q1: Can aluminum armor cables be aerial?
A: Not recommended! Aluminum lacks steel’s tensile strength. Use ADSS cables for aerial spans.
Q2: How long does aluminum armor last underground?
*A: 25 years in most soils. Coastal zones: 15 years (vs steel’s 8-year average per Corning 2025 report).*
Q3: Does aluminum affect signal latency?
*A: Zero impact. Signal travels through fibers – armor only protects. Attenuation remains ≤0.36dB/km @1550nm.*
Q4: Can I splice aluminum armor without special tools?
*A: No! Use arPluad cable splicers (e.g., 3M 2178-X) to avoid fiber micro-bends.*
Q5: Is aluminum armor recyclable?
*A: Yes! 95% recyclability rate vs steel’s 88% – an eco-win (EPA 2024 data).*Www.adsscable.cn
