HDPE Concentric Reducer
An HDPE Concentric Reducer is a precision-engineered pipe fitting made from high-density polyethylene (PE100/PE80 grades), specifically designed to connect two pipes of different diameters while keeping their centerlines aligned, thereby allowing a smooth and balanced reduction in flow size without causing turbulence or flow interruption in the piping system. With its excellent strength-to-density ratio, high flexibility, corrosion and chemical resistance, lightweight design, and ability to withstand harsh environmental conditions, this reducer ensures long-term leak-proof performance and durability. Widely used in sewage and wastewater pipelines, gas supply lines, and various industrial applications, the HDPE Concentric Reducer provides a reliable solution for adapting pipelines of different sizes while maintaining efficiency, safety, and longevity of the system.
HDPE Concentric Reducer
Key Features Of HDPE Concentric Reducer
- Material Strength – Manufactured from high-grade HDPE (PE100/PE80) for durability and long service life.
- Smooth Flow Transition – Provides gradual reduction in pipe size while maintaining aligned centerlines, reducing turbulence and pressure loss.
- Corrosion Resistant – Unaffected by rust, scaling, or electrochemical reactions unlike metal fittings.
- Chemical Resistance – Suitable for a wide range of industrial fluids and aggressive chemicals.
- Leak-Proof Jointing – Compatible with butt fusion, electrofusion, or mechanical jointing methods.
- Flexibility & Impact Resistance – Absorbs stress and vibrations effectively, ideal for underground and dynamic applications.
- Lightweight & Easy Handling – Easier to transport, install, and maintain compared to metallic reducers.
- Wide Range of Sizes & Ratings – Available in multiple diameters and pressure classes (PN6, PN10, PN16, PN20).
- Standards Compliance – Manufactured as per ISO 4427, EN 12201, DIN 16963, IS 8008 standards.

Technical Details of HDPE Concentric Reducer
Specification | Details |
---|---|
Product Type | HDPE Concentric Reducer |
Material | High-Density Polyethylene (HDPE) – PE80 / PE100 grade. |
Standards | ISO 4427, EN 12201, DIN 16963, IS 8008. |
Size Range | OD: 20 mm to 800mm |
SDR | SDR11, SDR21, SDR33 and SDR17 |
Pressure Rating | PN 6,PN 10,PN 16, PN 20 |
Temperature Range | –40°C to +60°C |
Color | Black |
Density | 0.941 – 0.965 g/cm³ |
Tensile Strength | ≥ 20 MPa |
Welding Compatibility | Butt Weld, Electrofusion Welding, Socket Fusion Weld, or Mechanical Jointing. |
Chemical Resistance | Excellent against acids, alkalis, and salts. |
Applications | Gas distribution , Sewage treatment, Industrial fluid handling, Mining & slurry transportation and Firefighting networks |

dₑ₁/dₑ₂ | L | I₁ | I₂ |
---|---|---|---|
25/20 | 37 | 12 | 12 |
32/25 | 43 | 12 | 12 |
40/20 | 50 | 12 | 12 |
40/25 | 50 | 12 | 12 |
40/32 | 50 | 12 | 12 |
50/25 | 55 | 12 | 12 |
50/32 | 55 | 12 | 12 |
50/40 | 55 | 12 | 12 |
63/32 | 65 | 16 | 12 |
63/40 | 65 | 16 | 12 |
63/50 | 65 | 16 | 12 |
75/32 | 80 | 19 | 12 |
75/40 | 71 | 19 | 12 |
75/50 | 71 | 19 | 12 |
75/63 | 71 | 19 | 16 |
90/50 | 80 | 22 | 12 |
90/63 | 80 | 22 | 16 |
90/75 | 80 | 22 | 19 |
110/50 | 105 | 28 | 12 |
110/63 | 97 | 28 | 16 |
110/75 | 97 | 28 | 19 |
110/90 | 97 | 28 | 22 |
125/63 | 112 | 30 | 16 |
125/75 | 108 | 32 | 19 |
125/90 | 108 | 32 | 22 |
125/110 | 108 | 32 | 28 |
140/75 | 123 | 35 | 19 |
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dₑ₁/dₑ₂ (mm) → External Diameter 1 / External Diameter 2 (in millimeters)
-
L (mm) → Overall Length (in millimeters)
-
I₁ (mm) → Insertion Depth 1 (in millimeters)
-
I₂ (mm) → Insertion Depth 2 (in millimeters)

Custom Product Manufacturing Available
If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.