Pipe Couplings & Fittings
HT Casting has nearly 4 decades of experience in manufacturing grooved pipe fittings including grooved couplings, grooved reducers, grooved tees, grooved crosses, grooved elbows, grooved flanges, grooved end caps, etc. Our company has a strong influence on the Chinese piping industry due to our extensive product portfolio, certified quality, and guaranteed delivery:
- Extensive Product Portfolio: more than 6000 product types are available to suit your different piping systems such as commercial HVAC and fire protection systems, commercial plumbing and piping systems.
- Certified Quality: certified by FM, UL, CE, etc., you can rest assured about the quality of our pipe fittings.
- Guaranteed Delivery: with high production capacity of 30,000 tons/year, our grooved couplings and fittings can be delivered within 20 days.

Grooved couplings are mechanical pipe connections that utilize grooves to interlock pipes. These couplings are widely employed in various grooved piping systems, including water supply, fire protection, HVAC, and process piping systems. The fundamental design of a grooved coupling comprises two grooved-end fittings with a gasket placed in between, which is secured using bolts or clamps.
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- Grooved Rigid Coupling
- Available sizes: 1~12 inch | DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM/UL/CE certified
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- Grooved Flexible Coupling
- Available sizes: 1~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM/UL/CE certified
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- Angle-Pad Rigid Coupling
- Available sizes: 1~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM/UL/CE certified
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- Grooved Reducing Flexible Coupling
- Available sizes: 1 1/4×1 inch~8×6 inch |DN32×25~DN200×150
- Working pressure: 300 PSI
- Certificate: UL/CE certified
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- Grooved One-Stop Coupling
- Available sizes: 1~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM/UL/CE certified
Grooved reducers are utilized in piping systems and various industrial applications to connect pipes of different sizes. They are often referred to as "reducing couplings" because they reduce the pipe size from one end to the other. The grooves on the fittings refer to a specific type of connection method employed to securely join the pipes. Grooved reducers typically feature different diameters at each end, with the larger end being grooved.
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- Grooved Concentric Reducer
- Available sizes: 1 1/4×1 inch~12×10 inch |DN32×25~DN300×250
- Working pressure: 300 PSI
- Certificate: FM/UL/CE certified
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- Threaded Concentric Reducer
- Available sizes: 1 1/4×1 inch~12×4 inch |DN32×25~DN300×100
- Working pressure: 300 PSI
- Certificate: FM/UL/CE certified
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- Grooved Eccentric Reducer
- Available sizes: 1 1/4×1 inch~12×4 inch |DN32×25~DN300×100
- Working pressure: 300 PSI
- Certificate: FM/UL/CE certified
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- Threaded Eccentric Reducer
- Available sizes: 1 1/4×1 inch~x12×4 inch |DN32×25~DN300×100
- Working pressure: 300 PSI
- Certificate: FM/UL/CE certified
A grooved tee is a type of pipe fitting used to connect three pipes at a T-junction. It is named after the grooves present at the end of each pipe, which allow for quick and easy connection using mechanical couplings. Grooved tees are commonly used in various industrial applications that require high reliability and efficiency of the piping system.
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- Mechanical Tee Grooved Outlet
- Available sizes: 2×1 inch~10×4 inch |DN50×25~DN250×65
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Mechanical Tee Threaded Outlet
- Available sizes: 2×1 inch~10×4 inch |DN50×25~DN250×65
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- U-Bolt Mechanical Tee
- Available sizes: 1×1/2 inch~3×1 inch |DN25×15~DN80×25
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved Equal Tee
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved Reducing Tee
- Available sizes: 2×1 inch~10×4 inch |DN50×25~DN250×65
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Threaded Reducing Tee
- Available sizes: 2×1 inch~10×4 inch |DN50×25~DN250×65
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved Long Radius Equal Tee
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved Bullhead Tee
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved Lateral Tee
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
Grooved cross is a type of pipe fitting used to connect four pipes at a common intersection. The end of a grooved cross is connected to the pipes through grooves or threads, forming a strong and leak-proof joint.
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- Mechanical Cross Grooved Outlet
- Available sizes: 2×1 inch~10×4 inch |DN50×25~DN250×65
- Working pressure: 300 PSI
- Certificate: CE certified
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- Mechanical Cross Threaded Outlet
- Available sizes: 2×1 inch~10×4 inch |DN50×25~DN250×65
- Working pressure: 300 PSI
- Certificate: CE certified
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- Grooved Reducing Cross
- Available sizes: 3×1 inch~12×4 inch |DN80×25~DN300×100
- Working pressure: 300 PSI
- Certificate: CE certified
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- Threaded Reducing Cross
- Available sizes: 3×1 inch~12×4 inch |DN80×25~DN300×100
- Working pressure: 300 PSI
- Certificate: CE certified
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- Grooved Equal Cross
- Available sizes: 2 inch~8 inch |DN50~DN200
- Working pressure: 300 PSI
- Certificate: FM/UL/CE certified
A grooved elbow refers to a pipe fitting with grooves at its ends, designed for connecting two pipes at various angles. The grooved end of the elbow features a series of small dents or grooves, allowing easy and secure connection to the pipe using mechanical couplings or clamps. Grooved elbows are commonly used in industrial and commercial applications where high flow rates, pressures, or temperatures are required in the pipeline system.
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- Grooved 90° Reducing Elbow
- Available sizes: 1 1/4×1 inch~12×10 inch |DN32×25~DN300×250
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved Long Radius 90° Elbow
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved 90° Elbow
- Available sizes: 1 1/4×1 inch~8×6 inch |DN32×25~DN200×150
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved 45° Elbow
- Available sizes: 1 inch~12 inch |DN25~DN600
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved 22.5° Elbow
- Available sizes: 1 inch~12 inch |DN25~DN600
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
Grooved flanges are widely used in piping and HVAC systems to connect pipes of different sizes and materials. A grooved flange is a type of pipe fitting with grooves or dents around its circumference, facilitating easy and secure connection to grooved-end pipes. The grooves on the flange are typically evenly spaced and designed to align with corresponding grooves on the grooved-end pipe.
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- Grooved Adaptor Flange
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved Ring Flange
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved KS Adaptor Flange
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved Split Flange PN16
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
Grooved end caps are designed for grooved pipeline systems. A grooved pipeline system is a type of pipe joint that uses a series of grooves and special fittings at the ends of pipes to form a secure and leak-free connection. Grooved end caps are typically used to cover the end of a grooved pipeline, effectively sealing it and preventing the flow of fluid or gas through the pipe.
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- Grooved End Cap
- Available sizes: 1 inch~12 inch |DN25~DN600
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved End Cap with Concentric Hole
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified
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- Grooved End Cap with Eccentric Hole
- Available sizes: 1 inch~12 inch |DN25~DN300
- Working pressure: 300 PSI
- Certificate: FM / UL /CE certified