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Grooved Couplings and Fittings
Home » Products » Grooved Couplings and Fittings

Grooved Couplings and Fittings

  • 90°Elbow
    90 Degree Pipe Fitting
    Brief:
    The 90 elbow to change the direction of the pipeline, and it is usually used where the pipeline needs to turn. It can reduce the fluid resistance and pressure loss that may be caused by right-angle turns while ensuring the stability and smoothness of the pipeline system. Due to its simple design and convenient installation, the 90-degree elbow is widely used in fire protection pipelines, water supply pipelines and other systems.
  • Flexible Coupling
    Flexible Coupling
    Brief:
    The flexible coupling is a type of fitting designed to connect pipes using a specialized groove and seal ring mechanism. It helps to absorb pipe movement and vibrations, effectively minimizing the risk of pipe failure. This product makes pipe installation and removal easier while delivering superior sealing performance to maintain system integrity and reliability. Its versatility makes it ideal for use in fire protection, water supply, HVAC, petrochemical applications, and more, particularly in pipe systems that demand flexibility, seismic resistance, and leak-proof connections.
  • 45°Elbow
    45 Degree Pipe Fitting
    Brief:
    45° elbow in the groove is to change the direction of the pipe, and it is usually used in places where a small angle is required. It can bend the pipe at a 45-degree angle, which is suitable for slight changes in the direction of fluid flow. Compared with the 90-degree elbow, the 45-degree elbow can reduce the fluid resistance in the pipe, maintain a relatively smooth flow, and can effectively adjust the pipe layout in a small space. Due to its easy installation and good flow performance, the 45° elbow is widely used in fire protection systems, water supply pipelines and other fields.
  • Grooved Coupling Rigid Coupling
    Grooved Coupling Rigid Coupling
    Brief:
    Grooved rigid couplings are mechanical pipe connectors designed to create a fixed and non-flexible joint in grooved piping systems. They are specifically used in applications where pipe alignment, rigidity, and system stability are required.
    By mechanically locking into the pipe grooves, rigid couplings provide a joint performance comparable to flanged or welded connections, while maintaining the advantages of fast installation and easy maintenance.
  • 22.5 Degree Grooved Elbow | Ductile Iron 1″–12″
    22.5 Degree Grooved Elbow | Ductile Iron 1″–12″
    Brief:
    The 22.5° Grooved Elbow provides a smooth change in direction for grooved-end piping systems while maintaining full flow. Manufactured from ductile iron (ASTM A536) with corrosion-resistant coating, it mates with roll-grooved or cut-grooved steel pipe and installs quickly using standard grooved couplings.
  • Angle Pad Coupling
    Angle Pad Coupling
    Brief:
    Angle Pad Coupling is a special fitting for pipe connection, usually used to connect two pipes at an angle. It ensures the sealing and stability between pipes by using special gaskets and steel clamps. Angle Pad Coupling is particularly suitable for occasions where pipe offset or cornering is required. It can withstand certain pressure and vibration while maintaining the overall stability and sealing performance of the pipe system.

    This product is widely used in fire protection systems, heating, ventilation and air conditioning (HVAC) systems, water supply and drainage systems, and oil and gas industries. Especially in those occasions where space is limited or the direction of the pipe needs to be adjusted, Angle Pad Coupling provides a simple and effective solution. Due to its easy installation and high reliability, it has become one of the indispensable key accessories in the pipeline system.
  • 22.5 Degree Grooved Elbow | Ductile Iron 1″–12″
    11.5 Degree Grooved Elbow | Ductile Iron 1″–12″
    Brief:
    The 11.5 Degree Grooved Elbow is a precision-engineered pipe fitting designed to provide a very slight change in pipeline direction in grooved piping systems. Compared with 22.5°, 45°, and 90° elbows, the 11.5° elbow allows for fine alignment and gradual direction correction, helping installers achieve accurate routing while minimizing flow resistance and system stress. It is widely used in fire protection, HVAC, and industrial piping systems where precision and smooth flow transition are required.
  • China Manufacturer of FM/UL Listed Shouldered Coupling
    FM/UL Listed Shouldered Coupling
    Brief:
    Our shouldered couplings are specially designed for high-pressure piping systems using shouldered-end steel pipes. Made of durable ductile iron and equipped with high-quality EPDM or NBR gaskets, they ensure a reliable, leak-free connection even in demanding environments such as mining, tunneling, and water infrastructure projects.
    Easy to install and remove, they are ideal for quick assembly, system maintenance, and long-term performance.
  • Reducing Flexible Coupling for Fire Protection Systems – China Manufacturer
    Reducing Flexible Coupling for Fire Protection Systems
    Brief:
    Our reducing flexible coupling is designed to connect pipes of different diameters while allowing for flexibility, vibration absorption, and easy installation. Made from high-strength ductile iron and fitted with EPDM or NBR gaskets, it provides a secure, leak-free connection under pressure. Ideal for fire protection, HVAC, and industrial piping systems, this coupling simplifies system design by eliminating the need for concentric reducers and additional joints.
  • Tee
    Grooved Pipe Tee
    Brief:
    The Tee is to branch or connect a pipeline to a main pipeline to form a T-shaped structure. It can achieve the distribution or convergence of fluids in different directions and is often used in pipeline systems that require diversion or convergence. In applications such as fire protection systems and water supply pipelines, tees can not only effectively change the direction of fluid flow, but also ensure the stability and smoothness of the pipeline system, and are particularly suitable for occasions that require quick installation and disassembly.
  • Threaded Pipe Reducing Tee
    Threaded Pipe Reducing Tee
    Brief:
    The Threaded Grooved Reducing Tee is designed to create a reduced threaded branch outlet from a grooved main pipeline. It enables efficient branching where the outlet size is smaller than the main pipe, making it especially suitable for systems that commonly use threaded connections on small-diameter branch lines. This fitting combines the advantages of grooved installation speed and threaded connection compatibility, offering a practical and reliable solution for complex piping networks.
  • FM/UL Quick Rigid Grooved Coupling
    FM/UL Quick Rigid Grooved Coupling
    Brief:
    Quick Rigid Coupling are accessories for quick connection and fixing of pipes. They are designed with a simple and fast installation method, usually without additional tools or welding. It ensures the firmness and sealing of pipe connections through a unique groove design and locking mechanism. Quick Rigid Coupling can effectively resist pressure fluctuations between pipes while avoiding leakage problems and providing reliable connections.
    This product is widely used in fire protection systems, building pipes, heating, ventilation and air conditioning (HVAC) systems, water supply and drainage pipes, etc. Especially in environments that require quick installation, disassembly or maintenance, Quick Rigid Coupling provides great convenience. In fire protection systems, it can ensure the safety and reliability of pipe connections; in HVAC and water supply pipes, it provides a simple and efficient connection solution, especially for places that require frequent maintenance and adjustment. Due to its high efficiency and convenience, Quick Rigid Coupling has been widely used in modern buildings and industrial piping systems.

Grooved Couplings and Fittings for Reliable Pipe Connections

Discover a superior method for joining pipe systems with our comprehensive selection of high-quality grooved couplings and fittings. Engineered for speed, safety, and long-term reliability, the grooved pipe connection system is the modern, flame-free solution for a wide range of industrial, commercial, and fire protection applications. Move beyond traditional welding and flanging to a system that offers unparalleled efficiency and durability.


Core Components of the Grooved System

The ingenuity of the grooved pipe connection lies in its simple yet robust design, consisting of three primary elements working in unison to create a secure, leak-tight seal.

> The Grooved Pipe: A groove is cold-formed or machined into the pipe end. This groove provides a seat for the coupling to engage, creating a unified and strong joint.

> The Gasket: A resilient, pressure-responsive elastomeric gasket creates the seal. It is designed to fit over the two pipe ends, creating an initial seal that is strengthened as the system is pressurized. Gaskets are available in various materials like EPDM, Nitrile, and Silicone to suit different applications, from potable water to petroleum oils.

> The Coupling Housing: Manufactured from high-strength ductile iron, the housing segments encase the gasket and lock into the grooves on both pipes. As the nuts and bolts are tightened, the housing compresses the gasket, securing the joint and completing the connection.


Advantages of a Grooved Pipe Connection

Choosing a grooved system offers significant advantages in performance, safety, and total installed cost.

> Rapid & Safe Installation: The primary advantage of a grooved coupling is the speed of assembly. It is significantly faster than welding, threading, or flanging, drastically reducing labor hours and costs. As a flame-free method, it enhances job site safety, particularly in enclosed spaces or during system modifications.

> Exceptional Reliability & Durability: Our fittings are engineered for a service life of up to 50 years. Constructed from high-strength ductile iron that meets ASTM A536 standards, these components offer superior strength. The pressure-responsive gasket design ensures a dependable, leak-free seal that performs reliably under demanding conditions.

> System Flexibility & Maintenance: Flexible grooved couplings are designed to accommodate pipe expansion, contraction, and deflection, making them an ideal choice for systems subject to thermal changes or seismic activity. This design also helps dampen vibration and noise. The system's simplicity allows for easy disassembly, streamlining routine maintenance and system expansions.

> Proven Performance: With a product qualification rate exceeding 99.96% and a reorder rate of over 90%, the quality and performance of these fittings are trusted by professionals globally.


Technical Specifications and Certifications

We provide components that are not only built to last but are also verified by the world's most stringent third-party certification bodies, ensuring they meet the highest standards of safety and quality.


> Material: High-tensile Ductile Iron (ASTM A536, Grade 65-45-12; QT450-10).

> Pressure Rating: Maximum working pressures up to 350 PSI, with rigorous hydrostatic and pressure testing performed on all components to ensure leak-tight performance.

> Standards Compliance: Grooves are manufactured to ANSI/AWWA C606 standards, while threads conform to ASME B1.20.1 / ISO 7-1. Flanges meet ASME/ANSI B16.1 standards.

> Surface Finish: Standard corrosion-resistant finishes include high-quality epoxy paint and hot-dip galvanizing for extended service life.

> Global Certifications: Our grooved couplings and fittings carry a comprehensive portfolio of international approvals, demonstrating our commitment to trustworthiness and authority in the field:

     - FM Approved

     - UL & CUL Listed

     - NSF/ANSI 61 & 372 Certified for safe use in potable water systems.

     - CE & VDS Approved


Applications Across Industries

The versatility and reliability of the grooved pipe connection system make it the preferred choice for a multitude of critical applications. Our products have demonstrated proven performance in some of the world's most iconic structures, including the Beijing Daxing International Airport, the National Stadium ("Bird's Nest"), and the Shanghai World Financial Center.


> Fire Protection: The system is a cornerstone of modern fire safety, used extensively in wet, dry, and deluge sprinkler systems for commercial, residential, and industrial buildings.

> HVAC, Plumbing & Water Systems: Ideal for water supply pipelines, heating pipes, system water pipelines, and water treatment facilities due to reliability and NSF certification for safe water.

> Industrial & Process Piping: Trusted for use in gas and oil pipelines and other demanding industrial settings.


Browse our extensive selection of grooved fittings and couplings below. For technical specifications, project quotes, or expert advice, contact our team of piping experts today.

Inquiry

Telephone

+86-130-1137-4563

Sales Phone

+86-188-3320-7623

WhatsApp

+8613011374563

Email

inquiry@maitoleadfitting.com

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