Introduction — HDPE Flange Fittings Manufacturer in India
Chemtech Polyplast is a prominent HDPE Flange Fittings Manufacturer in India. We specialize in producing high-integrity flange adapters, stub ends, and blind flanges that facilitate the connection of HDPE pipelines to flanged components like valves, pumps, and tanks, or to pipelines made of different materials (like DI or MS). Our fittings are crucial for creating removable joints in high-pressure systems.
Precision Manufacturing of Flange Adapters
Our HDPE flange adapters (also known as stub ends or lap joints) are manufactured using precision injection molding and fabrication techniques from PE 100 grade material. They are designed to be used with a metal or PP-Glass-Filled (PPGF) backing flange (or lap joint flange). The HDPE stub end is butt-fused to the pipe, and the backing flange rotates freely for easy bolt alignment, creating a secure, leak-proof, and easily dismantle-able joint.
Applications — HDPE Flange Fittings
- Connecting HDPE pipes to pumps, valves, and flow meters.
- Joining HDPE pipelines to DI (Ductile Iron) or MS (Mild Steel) pipes.
- Terminating a pipeline (using a blind flange).
- Creating removable sections for system maintenance or inspection.
- Use in water treatment plants, industrial processing, and marine outfalls.
Key Features — Our Flange Fittings
- Manufactured from high-grade PE 100 resin.
- Stub-ends provide a perfect sealing face.
- Allows for easy disassembly and system modification.
- Corrosion-proof, unlike traditional metal flanges.
- Used with rotating backing flanges for easy bolt alignment.
Advantages of Our Flanges (India-Wide Supply)
- Provides a strong, reliable, and removable joint.
- Total resistance to corrosion and chemicals.
- The fluid only contacts the HDPE stub end, protecting the backing flange.
- Lightweight and easier to install compared to full-face metal flanges.
- We supply across India, ensuring consistent quality for national projects.
HDPE Flange Fitting Specifications
- Types: Stub End (Lap Joint Adapter), Blind Flange.
- Material: HDPE (PE 100), PPGF (for backing flanges).
- Standards: Conforms to ISO and IS standards.
- Pressure Rating: PN 6, PN 10, PN 16.
- Sizes: Available from 20 mm to 630 mm and above.
Chemtech Polyplast — Your National Flange Partner
As a trusted HDPE Flange Fittings Manufacturer in India, Chemtech Polyplast delivers quality you can depend on. Our manufacturing hub in Ahmedabad is equipped to handle bulk orders for projects anywhere in the country. We ensure every flange adapter provides a perfect fit and long-term, leak-free service.
Installation & System Tips — Flange Joints
- Always slide the backing flange onto the pipe *before* fusing the stub end.
- Ensure the stub end is butt-fused correctly to the HDPE pipe.
- Use a full-face gasket between the two flange faces.
- Tighten the bolts in a star or crisscross pattern for even pressure.
- Do not over-tighten, as this can damage the flange or stub end.
FAQs — HDPE Flange Fittings
1. What is an HDPE stub end?
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An HDPE stub end (or lap joint adapter) is a fitting that is butt-fused to the end of an HDPE pipe. It has a flange-like face that is pressed against another flange using a rotating metal or PPGF backing flange.
2. Why use a backing flange with a stub end?
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The backing flange provides the structural strength for bolting. Since it's separate and rotates freely, it makes aligning the bolt holes with the mating flange incredibly easy during installation.
3. What is an HDPE blind flange used for?
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A blind flange is a solid disc used to cap or seal the end of a flanged pipe or valve. It allows for future expansion or easy access to the pipeline for maintenance.
4. Can I connect an HDPE pipe directly to a metal valve?
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Yes, this is the primary use of an HDPE flange assembly. You butt-fuse an HDPE stub end to your pipe, and then use a backing flange to bolt it directly to the flange of the metal valve.
5. Do you manufacture the backing flanges as well?
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Yes, we manufacture high-strength PPGF (Glass-Filled Polypropylene) backing flanges and can also supply compatible metal (MS, SS) flanges as part of the complete assembly.
