Dredge Hose
About Dredge Hose
A dredge hose is a specialized rubber hose designed for transporting abrasive slurries, sand, gravel, and sediment in dredging operations. According to industry standard definitions, a dredge hose features a highly wear-resistant inner liner, multiple reinforcement layers, and a tough outer cover to withstand extreme abrasion, high working pressures, and harsh marine environments.
Typical applications include:
Cutter suction dredgers
Trailing suction hopper dredgers
Sand mining and reclamation projects
Port and channel deepening
Offshore construction
HENGHUA is a leading manufacturer and supplier of dredge hoses in China, combining advanced rubber compounding technology with robust reinforcement engineering. We provide OEM ODM services, wholesale options, and bulk discounts to global partners. Our mission is to deliver service, support, and solution-oriented fluid transfer systems that reduce your total cost of ownership. Contact us today to become a trusted partner in your dredging projects.
Technical Specifications of Dredge Hose
Size Range and Pressure Ratings
| Parameter | Range |
|---|---|
| Inner Diameter (ID) | 2 inch to 24 inch (50mm to 600mm) |
| Working Pressure | 150 psi to 1,200 psi (1.0 MPa to 8.0 MPa) |
| Burst Pressure | 4x safety factor (600 psi to 4,800 psi) |
| Min. Bend Radius | 3x to 5x of hose OD |
| Temperature Range | -30°C to +100°C (-22°F to +212°F) |
Construction Layers and Materials
Inner Tube (Abrasion-Resistant Layer)
- Material: Natural rubber (NR) or SBR blend with 60+ Shore A hardness
- Properties: Exceptional resistance to sand, gravel, and slurry erosion
- Smooth bore for minimal flow resistance
Reinforcement Layer (The Strength Core)
- Wire spiral hose construction: 2 to 8 layers of high-tensile steel wire spiraled at opposite angles
- Wire braided hose alternative: 2 to 4 layers of braided steel wire for lower pressure applications
- Design principle: Spiral angle optimized (54°44’) to balance pressure resistance and flexibility
- Helical steel wire embedded between rubber layers prevents kinking under vacuum
Cover Layer
- Material: CR (chloroprene rubber) or SBR blend with UV and ozone inhibitors
- Properties: Marine environment resistant (saltwater, sunlight, oil)
- Color: Yellow or black with longitudinal stripe for wear indication
End Connections
- Crimped fittings: Permanent attachment with 360° mechanical lock
- Reusable fittings: Field-attachable for emergency repairs
- Adapters and flanges: Customized to match your dredge pump discharge
- Protective sleeves and guards: Added for hose assemblies in high-traffic deck areas
Performance Features
- Abrasion resistance: Inner tube withstands 1,000+ hours of sand slurry testing (ASTM D5963)
- Vacuum resistance: Steel helix prevents collapse under suction up to 25 inches Hg
- Pulse performance: 200,000 cycles at 120% working pressure without failure
- Ozone and weather resistance: Accelerated aging test (ASTM D1149) passes 500 hours
- Hydrostatic proof test: Every hose batch tested at 150% working pressure for 5 minutes
Compliance Standards and Certifications
- ISO 2808: Specification for dredging hose assemblies
- ISO 6808: Wire-reinforced rubber hoses for suction and discharge
- SAE J2006: Rubber hose for dredging applications
- GB/T 10544: Chinese national standard for wire spiral hoses
- MSHA approval: Available for mining operations requiring flame resistance
- DNV/ABS certification: Optional for marine class-approved installations
Download our complete pdf specification sheet for detailed test data and dimensional tables.
Complete Dredge Hose Product Lineup
1. Suction and Discharge Dredge Hose
Definition: A heavy-duty hose designed for both negative pressure (suction) and positive pressure (discharge) in slurry transport systems.
- Size: 4″ to 20″ ID
- Pressure: Working up to 300 psi, burst 1,200 psi
- Reinforcement: 4-layer wire spiral + helix steel wire
- Cover: Yellow SBR with high-visibility stripe
- Best for: Cutter suction dredgers, hopper dredgers
2. Floating Dredge Hose
Definition: A buoyant hose with built-in flotation material that remains on water surface, reducing drag and installation complexity.
- Size: 6″ to 24″ ID
- Pressure: Working 150-600 psi, safety factor 4:1
- Reinforcement: 6-layer wire spiral with closed-cell foam flotation jacket
- Cover: CR rubber with marine growth-resistant finish
- Best for: Long-distance discharge lines in open water
3. Ceramic Lined Dredge Hose
Definition: A premium hose with alumina ceramic tiles bonded to the inner tube for extreme abrasion resistance.
- Size: 4″ to 12″ ID
- Pressure: Working up to 1,200 psi
- Wear life: 5-10x longer than rubber-lined hoses
- Reinforcement: 8-layer high-tensile wire spiral
- Best for: Sharp coral, granite, and heavy mineral dredging
4. Self-Floating Dredge Hose Assembly
Definition: Complete hose assembly with integrated flanges, lifting eyes, and end connectors pre-installed at factory.
- Length: Custom from 5m to 12m per section
- Fittings: Crimped fittings or reusable fittings with PN10/PN16 flanges
- Accessories: Protective sleeves, guards, and towing brackets
- Testing: 100% hydrostatic proof and vacuum test before shipment
Frequently Asked Questions (FAQ)
Q1: What is the standard length of a dredge hose section?
A: Standard is 6m, 8m, 10m, or 12m. Custom lengths available for floating lines.
Q2: Can I buy small quantities for testing?
A: Yes. Minimum order quantity is 50 meters for standard sizes. Sample orders ship within 7 days.
Q3: Do you provide OEM/ODM branding?
A: Yes. We print your logo, part number, and pressure rating on the hose cover. Minimum 500 meters for custom printing.
Q4: How do floating dredge hoses stay buoyant?
A: Closed-cell foam layer between reinforcement and cover provides neutral buoyancy. Optional air-filled chambers for deeper submersion.
Q5: What is the shelf life?
A: 5 years when stored indoors at 0-35°C away from ozone and UV.
Q6: Do you offer field technical support outside China?
A: Yes. We have distributors and service agents in Australia, Indonesia, India, Nigeria, and Brazil. On-site training available.
Factory Capabilities – From Bulk Raw Material to Finished Hose
Physical Scale and Infrastructure
HENGHUA’s 35,000m² campus includes:
12,000m² mixing and compounding workshop
8,500m² wire spiral and braiding hall
6,000m² vulcanization and curing zone
3,500m² quality lab and R&D center
5,000m² finished goods warehouse
Location advantage: 80km from Qingdao Port, reducing export logistics time to 2 hours.
Production Capacity and Automation
| Metric | Capability |
|---|---|
| Daily output | 100,000 meters (hose body) |
| Annual capacity | 30 million meters |
| Wire braiding machines | 48 units (German Karg brand) |
| Wire spiral machines | 32 units (Italian Omso brand) |
| Autoclave vulcanizers | 12 units (6m length capacity) |
| Crimping machines | 20 units (UP to 2″ fittings) |
Value for you: With 95 automated lines, we deliver 10,000m bulk hose within 15 working days. Emergency orders (under 3,000m) ship in 7 days.
Raw Material Control
We source strategic materials from global leaders:
Nitrile rubber (NBR)Â : Lanxess (Germany)
Steel wire : Bekaert (Belgium) – 2,800 N/mm² tensile strength
Carbon black : Cabot (USA)
Chemical bonding agents : Chemlok (USA)
This ensures batch-to-batch consistency and eliminates performance variability.
Quality Management System
Every production batch receives:
Green strength test of uncured rubber
Adhesion test between layers (peel force ≥ 8 N/mm)
Hydrostatic proof test at 150% working pressure
Vacuum test at 25 inches Hg for 10 minutes
Dimensional check (ID, OD, wall thickness)
Annual type tests include:
Impulse test: 200,000 cycles at 120% working pressure
Burst test: Minimum 4x working pressure
Abrasion volume loss (≤ 120 mm³ per DIN 53516)
Quality Certifications – Meeting Global Standards
HENGHUA’s dredge hose products carry:
| Certification | Scope | Authority |
|---|---|---|
| IATF 16949 | Automotive-grade quality management | SGS |
| ISO 9001:2015 | General quality systems | TÃœV |
| ISO 14001 | Environmental management | SGS |
| MSHA | Flame-resistant for mining | US Labor Dept |
| CCS | Marine class approval | China Class Society |
| ABS | Optional marine certification | American Bureau |
Performance benchmark: Independent tests confirm our dredge hose matches Parker, Gates, and Eaton specifications at 40-60% lower cost.
Traceability: Each hose receives a unique ID number linking to production date, raw material lot codes, and test records.
Selection and Usage Considerations
Selection Criteria
Operating pressure: Calculate maximum surge pressure (add 25% safety margin)
Slurry type: Ceramic lined for sharp particles (coral/granite); rubber lined for sand/gravel
Bend radius: Measure minimum space at dredge pump discharge and deck guide rollers
Temperature: Standard hose works to +100°C; high-temperature option to +150°C
Connection type: Flanges for permanent installations; reusable fittings for field repair
Installation Warnings
Never twist the hose during flange tightening – use swivel adapters
Maintain minimum bend radius even under pressure – tighter bends reduce burst strength by 40%
Support long horizontal runs with roller guides every 6-8 meters
Protect from sharp edges using protective sleeves or guards at deck penetrations
Inspection and Maintenance
Daily checks:
Outer cover cuts, bulges, or soft spots
Flange bolt tightness (re-torque after first 8 hours of operation)
Fittings for leakage or corrosion
Monthly checks:
Measure hose length for permanent stretch (replace if >5% elongation)
Ultrasonic wall thickness scan for suction hose sections
Pressure test at 125% working pressure
Replace immediately if:
Cover cracking exposes reinforcement wire
Bulge indicates layer separation
End fitting slips or rotates
Why HENGHUA is Your Trusted Partner in Power
A properly selected dredge hose from a reliable manufacturer like HENGHUA delivers 3-5 years of service in abrasive marine environments, reducing downtime and replacement cost compared to low-grade alternatives. Our wire spiral hose and wire braided hose constructions, combined with crimped fittings or reusable fittings, provide a complete hose assembly ready for immediate installation.
Emerging trends:
- Lighter materials : UHMWPE fiber reinforcement replacing steel wire for floating hose (30% weight reduction)
- Sensor-integrated hoses : Embedded fiber optics monitoring pressure, temperature, and bending fatigue
- Low-smoke zero-halogen (LSZH) covers : For dredging near populated areas or in tunnel projects
- Recyclable rubber compounds : Meeting stricter environmental regulations in EU and North America
HENGHUA is currently developing a smart dredge hose with real-time wear monitoring via RFID. Contact us to be an early adopter.
Partner with HENGHUA – your single source for design, manufacturing, assembly, and global logistics. We provide:
Free technical consultation for hose routing and fitting selection
Bulk discounts starting from 500 meters
Exclusive territory agreements for qualified distributors and wholesalers
White-label solutions for exporter brands
24/7 after-sales support via WhatsApp and email
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Start your inquiry – Tell us your ID, working pressure, and length requirement. We’ll reply with drawing, quotation, and delivery schedule within 24 hours.
Send a Mail
henghua@hhgpipe.com
Make a Call
+15822925523
86-22-83859963
Mon - Sun: 09:00 am - 22:00 pm
Main Office
Tianjin, China
Hezhong Building, Youyi North Road