Dimensional specifications, pressure classes and engineered jointing for specialized infrastructure service.
Backing Rings for PE Stub Ends — Outside diameter 110 mm
Backing Ring Mechanics in Polyethylene Stub Jointing
Polyethylene piping components possess lower compressive yield points compared to metallic alloys. In flanged assemblies, torquing steel bolts directly against polymer faces leads to flange creep and joint failure.
A metallic backing ring fits snugly behind the shoulder of the PE stub end, absorbing bolt tension and distributing compressive loads evenly across the sealing face.
Steel vs Ductile Iron Metallurgy & Applicable Standards
Offerings in this range include EN 1092-1 carbon steel backing rings with hot-dip galvanized or corrosion-proof epoxy coatings, alongside high-strength ductile iron rings conforming to EN 1092-2.
Ductile iron provides high impact toughness and yield strength, while coated steel options deliver rugged structural dependability across surface and buried installations.
Assembly Best Practices, Alignment & Crisscross Torquing
Precise axial alignment of mating flanges is essential prior to bolt tightening. Torque must be applied progressively in multiple stages using a crisscross pattern to ensure uniform stress across the backing ring and gasket.
Protective coatings shield the rings from corrosion and oxidation when exposed to moist soil or damp chamber environments.
Backing Rings for PE Stub Ends — Frequently Asked Questions
Which backing ring models are published in this section?
This category features steel backing rings (galvanized or epoxy-coated) and ductile iron backing rings.
Which standards govern the steel and ductile iron backing rings?
Steel rings are manufactured per EN 1092-1, and ductile iron rings are produced per EN 1092-2.
What is the primary role of a backing ring?
The backing ring carries bolt loads behind a polyethylene stub end, enabling safe connection to cast-iron valves or steel flanges.
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