Product Description

Acu-Tech sells a range of standard size backing rings (or backing flanges), from 20 mm to 1000 mm diameter. A backing ring is a circular metal ring, with holes around the perimeter, used in pairs to bolt two HDPE pipe spools together. This allows lengths of PE pipe to be disconnected and  re-connected, for inspection, replacement or relocation. The internal diameter of the backing ring should always be slightly larger than the outside diameter of the HDPE pipe.

These metal backing rings allow the two ends of a pipe to be joined with bolts. Also known as back up plates, backing rings hold the pipeline tightly to a valve or fitting and are often required for high-pressure pipe applications. Acu-Tech’s backing rings come in galvanised finish, or stainless steel backing rings are also available.

The following size backing rings are available:

Backing Ring product codes

The PIPA Industry Guidelines ‘Metal backing flanges for use with Polyethylene (PE) pipe flange adaptors’ states: Where there is a need to join polyethylene pipe to pipe of another material or ancillary equipment such as valves and pumps then mechanical flanges may be used. They provide not only a means of transition but a fully end load resistant joint that can also be disassembled for maintenance purposes. Flanges and fasteners should be coated in accordance with Australian standards or codes such as AS/NZS 4680 for galvanising. Alternatively, stainless steel flanges and fasteners can be used, or flanges can be protected with polymeric coatings in accordance with AS/NZS 4158 and be used in conjunction with stainless steel fasteners.

Acu-Tech also supplies butterfly valve spacers, blind flanges, flange gaskets, and bolt sets, for use with these Backing Rings. See https://www.acu-tech.com.au/ancillary-items/

Bolt Sets

HDPE Pipeline Valves

Blind Flanges

Flange Gaskets

Butterfly Valve Spacers

List of backing ring sizes available:

  • 15 mm backing ring for 20 mm PE pipe – ½” backing rings.
  • 20 mm backing ring for 25 mm PE pipe – ¾” backing rings.
  • 25 mm backing ring for 32 mm PE pipe – 1” backing rings.
  • 32 mm backing ring for 40 mm PE pipe – 1.¼” backing rings.
  • 40 mm backing ring for 50 mm PE pipe – 1.½” backing rings.
  • 50 mm backing ring for 63 mm PE pipe – 2” backing rings.
  • 65 mm backing ring for 75 mm PE pipe – 2.½” backing rings.
  • 80 mm backing ring for 90 mm PE pipe – 3” backing rings.
  • 100 mm backing ring for 110 mm PE pipe – 4” backing rings.
  • 100 mm backing ring for 125 mm PE pipe – 4” backing rings.
  • 125 mm backing ring for 125 mm PE pipe – 5” backing rings.
  • 125 mm backing ring for 140 mm PE pipe – 5” backing rings.
  • 150 mm backing ring for 160 mm PE pipe – 6” backing rings.
  • 150 mm backing ring for 180 mm PE pipe – 6” backing rings.
  • 200 mm backing ring for 200 mm PE pipe – 8” backing rings.
  • 200 mm backing ring for 225 mm PE pipe – 8” backing rings.
  • 250 mm backing ring for 250 mm PE pipe – 10” backing rings.
  • 250 mm backing ring for 280 mm PE pipe – 10” backing rings.
  • 300 mm backing ring for 315 mm PE pipe – 12” backing rings.
  • 350 mm backing ring for 355 mm PE pipe – 14” backing rings.
  • 400 mm backing ring for 400 mm PE pipe – 16” backing rings.
  • 450 mm backing ring for 450 mm PE pipe – 18” backing rings.
  • 500 mm backing ring for 500 mm PE pipe – 20’ backing rings.
  • 560 mm backing ring for 560 mm PE pipe – 22” backing rings.
  • 600 mm backing ring for 630 mm PE pipe – 24” backing rings.
  • 700 mm backing ring for 710 mm PE pipe – 26” backing rings.
  • 800 mm backing ring for 800 mm PE pipe – 28” backing rings.
  • 900 mm backing ring for 900 mm PE pipe – 35” backing rings.
  • 1000 mm backing ring for 1000 mm PE pipe – 39” backing rings.

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