Multipurpose Hose 300PSI (Smooth surface)

Product Overview

The multipurpose hose 300PSI (Smooth surface) is a high-performance synthetic rubber hose definition for air, oil, and medium-grade fuel transfer. Manufactured in China under strict quality control, this rubber hose meets international working pressure standards of 20 bar (300 PSI) with a 3:1 safety factor. It serves as a reliable solution for construction, shipyards, mining, and agriculture where durability and chemical compatibility are essential.

Its core construction combines a black NR & SBR synthetic rubber tube with single or double-ply high tensile polyester thread braiding. The smooth surface cover, also made from NR & SBR synthetic rubber, is available in black, yellow, or red for easy site identification. This layered design balances flexibility with resistance to abrasion and weather.

Key performance parameters include a temperature range from -40°C to +70°C, working pressure of 20 bar (300 PSI), and bursting pressure of 60 bar (900 PSI). Standard lengths are 50 or 100 meters per roll, depending on inside diameter. The hose remains lightweight yet robust, with weight per meter varying from 0.167 kg to 0.85 kg across sizes.

Core advantages include chemical compatibility with oils and medium-grade fuels, excellent flexibility in cold conditions down to -40°C, abrasion-resistant smooth cover, and cost-effective bulk supply. These features reduce downtime and replacement frequency in demanding job sites.

This multipurpose hose is widely used for pneumatic tools, fuel transfer lines, lubrication systems, and water-oil mixtures in mobile and stationary equipment. Specific applications include air compressors on shipyards, fuel lines in mining vehicles, and oil return lines in agricultural machinery.

It directly solves common field problems such as hose hardening in winter, cover cracking under UV exposure, and burst failure from pressure spikes. The smooth surface also resists dirt buildup and allows easy cleaning, a practical benefit for muddy construction sites.

As a leading rubber hose manufacturer and supplier in China, we provide full certification traceability, ISO compliance, and optional OEM ODM service. Every production batch undergoes pressure testing before shipping, ensuring consistent quality for wholesale buyers and distributors worldwide.

Product Advantages

• 300PSI Constant Working Pressure: Rated at 20 bar (300 PSI) across all diameters from 3/16″ to 1-1/4″, simplifying system design and inventory management.
• Smooth Surface Durability: The smooth cover resists abrasion, UV, and ozone, extending service life in outdoor and industrial environments.
• Extreme Temperature Flexibility: Performs reliably from -40°C to +70°C, preventing cold cracking and heat softening issues common in standard rubber hoses.
• Multipurpose Fluid Compatibility: Safe for air, medium-grade fuels, oils, and water-based fluids, reducing the need for multiple hose types on a single job site.
• Cost-Effective Bulk Supply: Available in 50m or 100m rolls, with competitive wholesale pricing and discount options for large-volume buyers.
• Easy Assembly Integration: Compatible with crimped fittings, reusable fittings, adapters, flanges, protective sleeves, and guards for complete hose assembly solutions.

Applicable Users: Construction contractors, mining equipment operators, shipyard maintenance teams, agricultural cooperatives, and facility management companies requiring dependable fluid transfer lines.

Detailed Technical Specifications Table

Full specification pdf available upon request.

Structure and Materials

Inner Tube: Black NR & SBR synthetic rubber, providing excellent resistance to medium-grade fuels and oils. The smooth inner surface minimizes flow resistance and prevents particle accumulation, ensuring clean media transfer.

Reinforcement: One or two plies of high tensile polyester thread braiding. This reinforcement layer absorbs pressure spikes up to 60 bar (900 PSI) bursting pressure while maintaining flexibility for tight bending radii common in construction equipment.

Cover: Smooth surface NR & SBR synthetic rubber in black, yellow, or red. The smooth finish resists dirt adhesion, simplifies cleaning, and provides abrasion protection against concrete, rock, and steel edges.

Why Polyester Braiding Instead of Wire?

Unlike Wire Braided Hose or Wire Spiral Hose designed for High Pressure Hose applications (typically above 3000 PSI), the multipurpose hose 300PSI uses high tensile polyester thread. Polyester braiding offers three distinct advantages for medium-pressure applications:

1. Lighter Weight: Reduces overall equipment weight, especially beneficial for handheld pneumatic tools and long hose runs.
2. Better Bending Fatigue: Polyester recovers faster after bending, extending service life in dynamic applications.
3. Corrosion-Free: No rust risk even when the cover is cut, maintaining structural integrity in marine or humid environments.

This engineering choice balances cost and performance for applications where ultra-high pressure is unnecessary but reliability is critical.

Application Industries

Construction & Shipyards

• Pneumatic tool supply lines (jackhammers, grinders)
• Compressor discharge hoses
• Fuel transfer for temporary generators
• Deck air lines on vessels

Mining Operations

• Underground equipment lubrication lines
• Medium-grade fuel supply for loaders and haulers
• Water-oil mixture transfer for dust control
• Protective sleeves and guards recommended for high-abrasion zones

Agriculture

• Tractor hydraulic oil return lines
• Sprayer air lines
• Grain dryer fuel supply
• Livestock facility compressed air systems

Industrial Manufacturing

• Assembly line pneumatic controls
• Machine tool oil circulation
• Paint booth air supply (with compatible fittings)
• Factory compressed air networks

Facility Management

• Workshop air compressor lines
• Boiler room oil transfer
• Maintenance cart utility hoses
• Quick-coupling hose assembly replacement

Precise Selection Professional Guide

How to Select the Correct Inside Diameter

Hose Assembly & Fittings Integration

The multipurpose hose 300PSI (Smooth surface) works with multiple connection systems:

• Crimped fittings: Permanent, leak-free connections for critical applications. Recommended for fuel and oil lines.
• Reusable fittings: Field-attachable, ideal for remote sites without crimping machines.
• Adapters: Convert between BSP, NPT, and JIC threads as needed.
• Flanges: For large-diameter (1″ and above) permanent installations.
• Protective sleeves & guards: Essential where hoses pass through bulkheads or near moving parts.

For complete hose assembly, we offer pre-crimped assemblies tested to 1.5x working pressure before shipping. This reduces on-site assembly errors and guarantees immediate installation readiness.

Multipurpose Hose 300PSI vs. Other Hose Types

Technical Standards and Certifications

The multipurpose hose 300PSI (Smooth surface) complies with international standards for medium-pressure rubber hose. While exact SAE or EN designations vary by diameter, the construction follows ISO 1307 for dimensions and ISO 1402 for pressure testing.

Key standard compliance:

• Working pressure safety factor: 3:1 (burst = 3x working pressure, exceeds general industry 2:1 for air/water hoses)
• Temperature rating: -40°C to +70°C meeting ISO 10619-2 low-temperature flexibility
• Dimensional tolerance: ISO 1307 Class B
• Ozone resistance: Cover passes ISO 1431-1 at 50 pphm, 40°C, 70 hours

Available certifications upon request:

• Factory production control certificate (ISO 9001:2015)
• Material RoHS and REACH compliance declarations
• Third-party pressure test reports (SGS or equivalent)
• Mill test certificates per EN 10204 3.1

Brand and Quality Assurance – HENGHUA

HENGHUA is a recognized rubber hose manufacturer, producer, and exporter based in China, specializing in medium and high-pressure fluid handling solutions for over 15 years. Our factory operates ISO 9001:2015 certified quality management systems, with in-house compounding, braiding, and curing lines.

Quality assurance process for this product:

1. Raw material incoming inspection: Every batch of NR & SBR rubber is tested for tensile strength, elongation, and hardness. Polyester thread is verified for denier and knot strength.
2. Online process control: During extrusion, wall thickness is monitored by laser gauge. Braiding tension is computerized to ensure even ply coverage.
3. Post-cure testing: After vulcanization, each hose length is visually inspected and air-tested at 25 bar (1.25x working pressure).
4. Destructive sample testing: One sample per shift is burst-tested to confirm >60 bar bursting pressure.
5. Traceability: Each roll receives a unique batch number linking to production records and raw material certificates.

Why choose HENGHUA as your supplier?

• Service & Support: Technical engineering support for hose assembly design and troubleshooting.
• Solution-oriented: We provide complete kits including pre-assembled hoses with crimped fittings and protective guards.
• Global supply capability: Container load shipments from our China factory to any major port, with full export documentation.
• OEM ODM flexibility: Custom printing, color matching (yellow/red covers), and non-standard lengths available for volume buyers.
• Inventory reliability: Over 200,000 meters of this multipurpose hose in stock, ready for immediate shipment.

We are not just a distributor or wholesaler – we are the source. Buying direct from our factory means lower cost, consistent quality, and direct technical communication.

Installation, Operation, and Maintenance Guide

Installation Best Practices

• Minimum bend radius: Do not bend the hose tighter than 5x the outside diameter. For HOSE-012 (OD 23mm), minimum bend radius is 115mm.
• Avoid twist: Mark the hose before tightening fittings. Twisted hoses fail prematurely at the fitting junction.
• Use protective sleeves: When routing through bulkheads, use guards or sleeves to prevent cover abrasion.
• Support long runs: Horizontal runs over 2 meters require support every 1 meter to prevent sagging and stress.

Operation Guidelines

• Pressure limits: Never exceed 20 bar (300 PSI) working pressure. Pressure spikes from compressor unloaders can reach 30 bar – install a surge suppressor if needed.
• Temperature monitoring: Surface temperature should not exceed +70°C. Near welding or grinding operations, use heat shields.
• Fluid compatibility: This hose is compatible with medium-grade fuels (diesel, kerosene) but NOT with high aromatic content fuels (gasoline, benzene). For gasoline, use a dedicated fuel hose.

Maintenance Schedule

Signs of imminent failure:

• Hardened or brittle feel (loss of flexibility)
• Blisters or bubbles under the cover
• Fitting movement or leakage at crimps
• Cover cracks exposing polyester braiding

Frequently Asked Questions (FAQ)

Q1: What is the difference between smooth surface and wrapped surface?
A: Smooth surface provides better resistance to dirt adhesion and is easier to clean, ideal for construction and shipyard environments. Wrapped surface offers slightly better grip but can accumulate grime. Both share the same pressure rating and material composition.

Q2: Can this hose be used for gasoline?
A: No. This multipurpose hose is designed for medium-grade fuels (diesel, kerosene, fuel oil). Gasoline contains high aromatics that will swell and degrade NR&SBR rubber within weeks. For gasoline, request our dedicated fuel hose specification.

Q3: What is the standard length per roll?
A: For diameters 3/16″ to 3/4″, standard length is 100 meters. For 1″ and 1-1/4″, length is 50 meters due to increased weight. Custom lengths (e.g., 30m, 60m) are available for OEM ODM orders.

Q4: Do you offer pre-assembled hoses with fittings?
A: Yes. We provide complete hose assembly services including crimped fittings, reusable fittings, adapters, and flanges. Assemblies are pressure-tested before shipping. Request our hose assembly pdf for fitting dimensions and crimp specifications.

Q5: What is the minimum order quantity for wholesale?
A: Standard wholesale MOQ is 1000 meters (mixed sizes allowed). Bulk discount applies above 5000 meters. For sample orders, we offer single-roll (100m) purchases at standard price.

Q6: How long is the warranty?
A: 12 months from shipment date against manufacturing defects. Warranty does not cover abrasive wear, chemical incompatibility, or overpressure use. We provide batch traceability for all claims.

Q7: Can you print my brand on the hose cover?
A: Yes. As an OEM ODM factory, we offer custom printing (company name, logo, pressure rating) on the smooth surface. Minimum order for custom printing is 5000 meters.

Q8: Do you have a pdf catalog with full specifications?
A: Yes. Download our complete rubber hose product catalog (including Wire Braided Hose, Wire Spiral Hose, High Pressure Hose, and this multipurpose series) from our website or request it via email.

Buy Direct from China Manufacturer

Ready to source the multipurpose hose 300PSI (Smooth surface) at competitive prices? Contact HENGHUA – your direct factory, producer, and exporter in China.

Why buy from us?

• Lower cost: No middleman markup. Factory-direct pricing saves 20-30% compared to distributors.
• Faster supply: 200,000+ meters in stock. Same-day dispatch for bulk orders.
• Better support: Technical engineers answer your fitting, assembly, and application questions within 24 hours.
• Complete solution: We supply not just hoses, but complete hose assembly with crimped fittings, protective sleeves, and guards.

Request today:

• Get wholesale price list (PDF) – include your target quantity and preferred sizes.
• Request free samples for testing.
• Ask for custom OEM ODM quotation with your brand printing.
• Download product specification pdf.

Tell us your application – air, oil, or fuel – and we will recommend the exact specification and best fittings for your needs.