HDPE Plain End Pipe Coupling
Key Features
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Designed for Plain-End HDPE Pipe
The coupling is specifically designed to connect plain-end HDPE pipe without requiring grooves or additional pipe-end preparation.
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No Hot-Melt Welding Required
The mechanical connection allows faster installation and maintenance compared with conventional hot-melt welding, making it suitable for field pipeline work.
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Flexible Mechanical Joint
The coupling provides a flexible mechanical connection while maintaining reliable sealing under rated operating pressure.
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HDPE-Compatible Housing Design
The ductile iron housing features a special inner-cavity profile adapted to the outer diameter of HDPE pipe, helping achieve a secure mechanical connection.
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Multiple Sizes
Available in 2"–8" (DN63–DN200) to accommodate different HDPE pipeline requirements.
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Corrosion-Resistant Coating
The standard housing is supplied with an epoxy powder coating, with other coating options available on request.
Technical Specifications
| Item | Specification |
| Product Type | HDPE Plain End Pipe Coupling |
| Connection Type | Mechanical |
| Compatible Pipe | Plain-End HDPE Pipe |
| Available Sizes | 2"–8" |
| Nominal Diameter | DN63–DN200 |
| Maximum Working Pressure | 10 bar / 1.0 MPa / 145 psi |
| Housing Material | Ductile Iron |
| Housing Material Standard | ASTM A536 Grade 65-45-12 |
| Housing Design | HDPE pipe OD-adapted inner cavity |
| Standard Coating | Epoxy Powder Coating |
| Standard Gasket | EPDM Rubber |
| Standard Hardware | Zinc-Plated High-Strength Carbon Steel |
| Optional Hardware | Stainless Steel |
| Operating Temperature | Dependent on gasket/seal selection |
Applications
The HDPE Plain End Pipe Coupling is designed for HDPE pipeline systems where a mechanical connection is required without hot-melt welding.
Typical applications include:
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HDPE water supply pipelines
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Mining water pipelines
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Mine pipeline systems
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Industrial water transportation
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Process water systems
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Underground water supply
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HDPE pipeline repair and maintenance
For specific operating conditions, gasket selection and pressure requirements should be confirmed based on the actual pipeline application.
Materials & Construction
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Housing
The coupling housing is manufactured from ductile iron conforming to ASTM A536 Grade 65-45-12.
The inner cavity features a specialized profile designed to accommodate the outside diameter of HDPE pipe.
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Gasket
EPDM rubber gasket is supplied as standard.
The gasket provides the sealing interface between the coupling and the HDPE pipe.
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Bolts & Nuts
Standard hardware:
Zinc-plated high-strength carbon steel
Optional: Stainless-steel hardware is available for applications requiring alternative hardware materials.
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Housing Coating
Standard: Epoxy powder coating
Optional: Other coating systems are available according to project requirements.
Installation & Maintenance
The mechanical design allows the coupling to be installed using standard fastening tools without hot-melt welding.
Typical installation involves:
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01
Prepare and align the plain-end HDPE pipes.
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02
Position the gasket at the pipe joint.
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03
Install the coupling housing around the pipe ends.
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04
Install and tighten the bolts and nuts according to the required procedure.
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05
Check pipe alignment and sealing before pressure testing.
Actual installation and bolt-tightening procedures should follow GOLDDRILL's product instructions and the applicable project requirements.
Custom & OEM Options
GOLDDRILL can support customized configurations for different HDPE pipeline requirements.
Available options may include:
● Custom pipe sizes
● Gasket materials
● Housing coatings
● Stainless-steel hardware
● Connection configurations
● Project-specific specifications
● OEM branding and packaging
For bulk orders or specific pipeline requirements, GOLDDRILL can review the pipe dimensions, working pressure and application conditions before production.
How It Works
The HDPE Plain End Pipe Coupling creates a mechanical connection between two plain-end HDPE pipes.
Unlike grooved pipe couplings, the HDPE pipe ends do not require grooving. Unlike butt fusion or electrofusion connections, the coupling does not require hot-melt welding equipment.
The coupling housing, gasket and hardware work together to create a mechanically secured and sealed pipe joint.
This makes it suitable for projects where installation speed, field serviceability and mechanical connection are important.
Why Choose GOLDDRILL?
HDPE Pipeline Connection Expertise
Designed specifically for connecting plain-end HDPE pipes in water supply and mining pipeline applications.
Mechanical Connection
Provides an alternative to hot-melt welding for applications requiring a mechanically assembled HDPE pipe joint.
Custom Manufacturing
Support for different sizes, coatings, gasket materials and hardware configurations.
OEM Support
GOLDDRILL provides OEM manufacturing based on customer specifications, drawings and project requirements.
FAQ
An HDPE Plain End Pipe Coupling is a mechanical pipe connection used to join plain-end HDPE pipes without grooving the pipe ends.
No. The coupling uses a mechanical connection, so hot-melt welding is not required.
The standard size range is 2"–8" (DN63–DN200).
The maximum working pressure is 10 bar / 1.0 MPa / 145 psi, subject to the specified product configuration and operating conditions.
The housing is made from ductile iron conforming to ASTM A536 Grade 65-45-12.
The standard gasket is EPDM rubber. Gasket selection should be confirmed according to the operating temperature and service conditions.
Yes. Stainless-steel hardware is available as an option.
Yes. GOLDDRILL can provide customized HDPE Plain End Pipe Couplings based on customer specifications, sizes, materials, coatings and project requirements.
