Certified and Reliable Pipe Connection Solutions for Fire Protection Systems

UL FM flexible grooved couplings are engineered to provide safe, leak-free, and durable connections for sprinkler and fire protection piping systems. Designed for both commercial and industrial applications, these couplings ensure compliance with international safety standards, fast installation, and long-term reliability.

As a professional manufacturer of UL FM flexible grooved couplings, we supply products that meet stringent UL and FM certifications required for fire protection projects worldwide.

Why Choose UL FM Flexible Grooved Couplings

Certified Compliance

• UL Listed: Recognized for fire protection system use in North America

• FM Approved: Validated for industrial and commercial fire sprinkler installations

• CE certified for European markets

• ISO 9001 quality management system

These certifications ensure that the couplings are suitable for critical fire safety systems and meet regulatory standards for contractors and engineers.

Flexible Design for Movement and Vibration

Flexible couplings accommodate:

• Thermal expansion and contraction

• Vibration from pumps or mechanical equipment

• Minor building settlement and seismic activity

This reduces pipeline stress and maintains system integrity under dynamic conditions.

Fast Installation and Maintenance

Compared with welded or flanged connections, UL FM flexible couplings provide:

• Quick bolt assembly without welding

• Reduced labor costs

• Easy disassembly for maintenance or system upgrades

This makes them ideal for high-rise buildings, commercial complexes, and large-scale fire protection projects.

Product Features

High-Quality Materials

• Ductile iron housing (ASTM A536)

• High-strength carbon steel bolts and nuts

• Corrosion-resistant epoxy coating or galvanization

These materials ensure durability, mechanical strength, and long-term performance in fire protection applications.

Gasket Options

• EPDM gaskets suitable for water-based fire protection systems

• Compatible with wet, dry, and pre-action sprinkler systems

• Maintains leak-free sealing under high pressure

Size Range and Compatibility

• Sizes from 1 inch to 24 inch (DN25 to DN600)

• Compatible with standard grooved pipe systems

• Victaulic-compatible designs for retrofit and replacement projects

Applications

UL FM flexible grooved couplings are used in:

Sprinkler Systems

• Wet and dry sprinkler pipelines

• Fire pump room connections

• High-rise building installations

Industrial Fire Safety

• Manufacturing facilities

• Warehouses and storage buildings

• Chemical plants and power plants

Commercial Building Projects

• Hotels, hospitals, and office buildings

• Large commercial complexes

• New construction or retrofit projects

Technical Specifications

Advantages Over Other Pipe Connection Methods

• Absorb vibration and thermal expansion

• Quick and simple installation

• Easy maintenance and retrofit capability

• Certified for global fire protection standards

UL FM flexible grooved couplings are the preferred choice for contractors and engineers who need reliable and compliant fire protection solutions.

Quality Control and Testing

We follow strict quality procedures for all UL FM flexible grooved couplings:

1. Raw material verification

2. Dimensional inspection

3. Mechanical performance testing

4. Pressure and leak testing

5. Coating and surface inspection

This guarantees high reliability and compliance with fire safety standards.

OEM and Project-Based Solutions

We provide customized solutions for fire protection projects:

• Logo marking and branding

• Packaging tailored for contractors

• Project-specific coatings or gaskets

• Technical support for system integration

Our flexible couplings are suitable for distributors, contractors, and large infrastructure projects worldwide.

Frequently Asked Questions

Are UL FM flexible couplings suitable for high-rise buildings?

Yes, their design compensates for thermal expansion and building movement, making them ideal for high-rise fire sprinkler systems.

Do you offer bulk supply for large projects?

Yes, we support large-volume orders with consistent quality and on-time delivery.

Can they be used in retrofit projects?

Yes, our couplings are compatible with standard grooved piping systems and can replace existing connections efficiently.

What pressure ratings are available?

Standard couplings support up to 300 PSI, with custom higher-pressure options available for specialized projects.

Contact a Trusted UL FM Flexible Grooved Couplings Manufacturer

We provide certified, high-quality flexible couplings for fire protection systems that meet the most demanding safety and performance requirements.

Contact CNG today to request a quote or technical support for your fire protection project.