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HDPE Custom End Cap

HDPE Custom End Cap, to ISO 4427, for customised HDPE pipe systems.

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Product Overview

The HDPE Custom End Cap is a one-piece machined pipe cap used to close the end of HDPE pipelines in water supply, dredging, mining and industrial service. Instead of injection moulding, every HDPE Custom End Cap from Bingo Pipeline is CNC lathe machined from a solid PE100 HDPE rod, so the cap body has no weld line and can be produced in pressure classes from PN10 up to PN32 - including heavy-wall ratings that moulded caps cannot reach.

Because the cap is machined rather than moulded, the HDPE Custom End Cap is not limited by mould sizes: the standard range covers d90 mm to d1200 mm, and special diameters, wall thicknesses and lengths are machined to order directly from our solid rod stock of 78-553 mm outside diameter. This makes the fitting a practical choice both for permanent line termination and for temporary closures during hydrostatic pressure testing.

Quick Information

  • Product Name: HDPE Custom End Cap
  • Material: PE100 HDPE, machined from solid rod
  • Manufacturing: CNC lathe machining, one-piece body
  • Size Range (d): 90 mm - 1200 mm
  • Pressure Rating: PN10 - PN32
  • Length (L): 80 mm (d90-200) / 120 mm (d225-630) / 150 mm (d710-1200)
  • Solid Rod Stock: OD 78 - 553 mm (±1 mm)
  • Standard: ISO 4427
  • Connection: Butt fusion to HDPE pipe

Specification Table

d (mm) L (mm) d (mm) L (mm)
90 80 355 120
110 80 400 120
125 80 450 120
140 80 500 120
160 80 560 120
180 80 630 120
200 80 710 150
225 120 800 150
250 120 900 150
280 120 1000 150
315 120 1200 150

Solid rod stock available for machining: OD 78 / 92 / 107 / 126 / 146 / 165 / 178 / 186 / 208 / 228 / 238 / 260 / 281 / 301 / 320 / 340 / 359 / 378 / 412 / 461 / 485 / 514 / 543 / 553 mm, tolerance ±1 mm. Custom diameters and wall thicknesses of the HDPE Custom End Cap can be machined to your drawing.

Key Features

  • One-piece CNC machined body: The HDPE Custom End Cap is turned from a single solid PE100 rod - no weld seam, no weak point, and higher pressure resistance than injection-moulded caps.
  • Wide pressure coverage: PN10 to PN32, including heavy-wall ratings for high-pressure water supply and fire protection lines.
  • Full size range: Standard diameters from d90 to d1200 mm cover small service lines up to large transmission mains.
  • Fast delivery from rod stock: Solid PE100 rod in 24 stock diameters (78-553 mm) is kept for machining, so non-standard caps are produced without waiting for moulds.
  • No mould cost: Machining to order makes small quantities and special dimensions cost-effective.
  • Standards compliance: Produced in line with ISO 4427 requirements for PE piping systems, with PE100 raw material.

Production

Raw Material

The HDPE Custom End Cap is machined from virgin PE100 solid HDPE rod. Rod stock is kept in 24 diameters from 78 mm to 553 mm (±1 mm), so the correct blank for each cap size is always available and the material properties match the connected PE100 pipe.

Molding Process

The rod blank is machined on a CNC lathe: the cap bore, the fusion face and the outer profile are turned to the approved drawing in one setup. This one-piece machining technology produces accurate dimensions and a homogeneous wall structure without any mould, which is why the HDPE Custom End Cap can carry PN32 pressure where moulded caps cannot.

Quality Control

Each cap is inspected for outside diameter, bore, wall thickness and length against the drawing before packing. Dimensional and pressure performance follow ISO 4427 requirements, and machining records are kept for traceability.

Applications

  • Water supply networks: Permanent termination of HDPE distribution and transmission mains from d90 to d1200 mm.
  • Hydrostatic pressure testing: The HDPE Custom End Cap closes line ends during pressure tests on new pipelines before commissioning.
  • Dredging pipelines: End closures on floating and shore discharge lines, matching the heavy-wall ratings of the dredging pipe.
  • Mining and slurry lines: Caps for tailings and slurry pipelines where abrasion-resistant PE100 and thick walls are required.
  • Fire protection and industrial plants: PN25-PN32 caps for fire water networks and process lines that operate above the rating of moulded fittings.
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