HDPE Stub END Graphics

HDPE Stub End

An HDPE Stub End is a specialized pipe fitting used in conjunction with a loose (lap joint) backing flange to create a secure and detachable joint in HDPE piping systems. Unlike a solid flange, the stub end is a short piece of pipe with a flared (collar) end that provides the sealing surface for the flange connection.

It is widely preferred in applications where frequent dismantling, inspection, or replacement of pipeline sections is required, since the flange can rotate freely around the stub end, making alignment with bolts much easier compared to fixed flanges.

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HDPE Stub End

Key Feature of HDPE Stub End
  • Material: Made from high-density polyethylene (PE100 or PE80 grades), offering excellent strength, flexibility, and chemical resistance.
  • Corrosion-Free: Unlike metal flanges, HDPE stub ends do not corrode, making them ideal for aggressive environments.
  • Lightweight: Easier to handle and install compared to metal fittings.
  • Cost-Effective: Saves material cost as only the stub end needs to be HDPE, while the backing flange can be carbon steel, stainless steel, or HDPE.
  • Long Service Life: Typically designed for 50+ years of operation under standard conditions.
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HDPE Stub End Image

Technical Details of HDPE Stub End

Specification Details
Product Type HDPE Stub End
Material High-Density Polyethylene (HDPE) – PE80 / PE100 grade.
Standards ISO 4427 / DIN 8077 / IS 4984 standards
Size Range (OD): 20 mm to 800mm (custom sizes available).
SDR SDR11, SDR21, SDR33, SDR13.6 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,
Chemical Resistance Excellent against acids, alkalis, and salts.
Applications Gas distribution , Sewage treatment, Industrial fluid handling, Mining & slurry transportation and Firefighting networks
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Technical Measurement of HDPE Stub End
HDPE Stub End Diagram
dₑ h l d₁ d₂ L
20 7 30 27 45 50
25 9 26 33 58 50
32 10 25 40 68 50
40 12 21 61 78 50
50 12 24 61 88 50
63 14 16 75 102 50
75 16 14 89 122 50
90 17 33 105 138 80
110 18 27 125 158 80
125 25 25 132 158 80
140 25 27 155 188 80
160 25 34 175 212 80
180 30 60 182 212 80
200 32 36 232 268 100
225 32 46 235 268 100
250 35 35 285 320 100
280 35 45 291 320 100
315 35 35 335 370 100
355 40 30 373 430 150
400 46 29 427 482 155
450 60 20 514 585 166
500 60 20 530 585 175
560 60 30 615 685 120
630 60 30 642 685 120
710 67 20 737 800 120
800 74 20 840 905 120

  • dₑ → External Diameter (Nominal Outside Diameter of pipe/fitting)

  • h → Height (vertical dimension of the fitting)

  • l → Length (dimension along the axis of the fitting)

  • d₁ → Diameter 1 (internal/connection side dimension)

  • d₂ → Diameter 2 (external/connection side dimension)

  • L → Overall Length (total length of fitting)

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Customization & Processing Options

Customizations Option Available for HDPE Stub End

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At Petron Thermoplast, we offer customized PVDF fittings to meet your specific system requirements.
Customization options include:

  • Tailor-made dimensions and wall thicknesses
  • Custom-molded and machined PVDF fittings
  • Pre-fabricated manifolds and assemblies
  • Choice of connection type (butt fusion, socket fusion, or flanged)
  • OEM branding or marking options