LUYUAN Ductile Iron Grooved Fittings and Couplings

LUYUAN offers a complete range of ductile iron grooved fittings, couplings and installation accessories for fire-protection, mechanical and water-piping systems.

This page combines the products supplied within the LUYUAN catalogue into one product-range page. The manufacturer provides the file as an integrated catalogue covering multiple fittings and accessories rather than separate catalogues for every model.

The range includes rigid and flexible couplings, elbows, tees, crosses, reducers, flanges, mechanical tees, pipe caps and other components used to install, modify and extend grooved piping systems.

The catalogue states that LUYUAN specializes in the manufacture of grooved piping products and exports its products to more than 70 countries.

Main Product Families:

Couplings:

• Rigid Coupling – XGQT1.
• Flexible Coupling – XGQT2.
• Reducing Flexible Coupling – XGQT5.
• Angle Pad Rigid Coupling – XGQT6.
• Heavy Duty Flexible Coupling – XGQT12.
• Shouldered Flexible Coupling.

Couplings are used to connect grooved pipe ends. Different models provide rigid, flexible, reducing or heavy-duty connection characteristics.

Rigid Coupling:

Provides a rigid pipe joint intended to limit relative movement between connected pipe ends.

Flexible Coupling:

Allows controlled pipe movement, angular deflection, expansion and contraction within the limits of the selected model and installation instructions.

Reducing Flexible Coupling:

Connects two different pipe sizes while providing the characteristics of a flexible grooved joint.

Heavy Duty Flexible Coupling:

Designed for applications requiring increased joint strength or more demanding operating conditions, subject to model size and pressure rating.

Elbows:

• 90° Elbow – XGQT01.
• 45° Elbow – XGQT02.
• 22.5° Elbow – XGQT16.
• 11.25° Elbow – XGQT10.

Elbows change the direction of the piping system and provide multiple angle options for routing around structures and equipment.

Tees and Crosses:

• Tee – XGQT03.
• Grooved Reducing Tee – XGQT13.
• Threaded Reducing Tee – XGQT13S.
• Cross – XGQT14.
• Grooved Reducing Cross – XGQT15.

These fittings divide the main pipe flow into additional branches. Equal, reducing, grooved and threaded outlet configurations are available according to model.

Mechanical Tees:

• Mechanical Tee Grooved Outlet – XGQT3.
• Mechanical Tee Threaded Outlet – XGQT3S.
• U-Bolt Mechanical Tee – XGQT3U.

Mechanical tees allow an additional branch outlet to be created through a prepared hole in the main pipe without installing a complete tee fitting in selected applications.

Grooved and threaded outlet options are available according to the selected model.

Reducers:

• Grooved Concentric Reducer – XGQT07.
• Threaded Concentric Reducer – XGQT07S.
• Grooved Eccentric Reducer – XGQT17.

Reducers connect pipes of different sizes.

Concentric Reducer:

Maintains the pipe centerline and provides a symmetrical transition between pipe sizes.

Eccentric Reducer:

Maintains one side of the pipe at a consistent level and can help reduce the possibility of trapped air or fluid when correctly oriented.

Flanges:

• Grooved Flange – XGQT8.
• Adaptor Flange – XGQT08.

Flanges connect grooved piping to flanged valves, pumps, equipment and other system components.

Pipe Caps:

• Cap – XGQT09.
• Cap with Concentric Hole – XGQT06S.
• Cap with Eccentric Hole – XGQT05S.

Caps close pipe ends. Concentric-hole and eccentric-hole configurations are available for selected branch, drain or instrument connections.

Material and Construction:

The catalogue describes the range as Ductile Iron Grooved Fittings and Couplings.

Ductile iron provides:

• Mechanical strength.
• Impact resistance.
• Durability in piping applications.
• Suitability for multiple fitting configurations.
• Reliable performance when correctly selected and installed.

Available Finishes:

The catalogue includes galvanized grooved fittings and coated configurations commonly used in fire-protection piping systems.

The final finish must be selected according to the installation environment, corrosion exposure and project specifications.

Certifications and Approvals Mentioned:

LUYUAN states that the company is certified to:

• ISO 9001:2015.
• ISO 14001:2015.
• ISO 45001:2018.

The catalogue also states that most products are listed or approved by organizations including:

• UL.
• FM.
• CE.
• KC.
• LR.

Not every model, size and finish necessarily carries the same approval. The approval status of the selected configuration must be verified before procurement.

Installation Information Included:

The catalogue contains installation information for selected products, including:

• Threaded Mechanical Tee installation.
• Grooved Mechanical Tee installation.
• Grooved Flange installation.
• Roll Groove Dimensions.

Pipe-end preparation, groove dimensions, hole dimensions, gasket selection and bolt tightening requirements must follow the instructions for the selected product and pipe size.

Applications:

• Firefighting piping systems.
• Automatic sprinkler systems.
• Fire-pump rooms.
• Fire-valve connections.
• Water piping systems.
• Mechanical services.
• Commercial buildings.
• Industrial facilities.
• Warehouses.
• Utility stations.
• Infrastructure projects.
• Systems using grooved pipe connections.

Benefits of Grooved Piping Connections:

• Faster installation than selected traditional joining methods.
• Reduced field welding requirements.
• Easier removal and reinstallation during maintenance.
• Wide range of fittings and branch configurations.
• Convenient connection to valves and equipment.
• Rigid and flexible coupling options.
• Suitable for network expansion and modification.
• Mechanical-tee options for additional branches.

Information Required Before Quotation or Procurement:

• Required fitting type.
• Model code.
• Pipe size.
• Connection type.
• Working pressure.
• Gasket type.
• System fluid.
• Operating temperature.
• Required finish.
• Required approval.
• Quantity.
• Project and consultant specifications.
• Authority requirements.

Important Note:

All LUYUAN models in the supplied file are presented under one product page because the manufacturer issued them as one complete Ductile Iron Grooved Fittings and Couplings catalogue.

This page provides an overview of the available range. Refer to the attached catalogue for the complete sizes, dimensions, weights, pressure ratings and detailed technical information for each model.