Mandrel-Bent Mould-Free Seamless Bend for Snake Run Pipework and Obstacle Avoidance HDPE Bend

The PE100 90° seamless bend (SDR 11) is manufactured by heating a solid PE100 pipe and bending it over a mandrel — producing a continuous wall with no mould parting line, no weld seam and no joint. Rated Water PN16 and Gas 10 Bar, it is the fitting of choice where a smooth, un-interrupted flow path and customisable radius matter.

Unlike injection-moulded elbows — which carry a visible parting line and a fixed short radius — the mandrel-bent seamless bend starts as a piece of PE100 pipe. The result is a smooth bore, full wall thickness around the bend, and a radius you can tune. Standard radii are 1.5D to 5D; larger radii up to 10D and custom angles are produced on request.

Typical use cases are snake-run pipework where the line weaves around obstacles, district heating and industrial process lines where smooth transitions reduce turbulence, and obstacle avoidance bends around foundations, ducts and existing utilities. Sizes cover d20mm to d500mm, with d63-315mm held as standard stock.

• Snake-run industrial pipework weaving around equipment and structures
• District heating and cooling distribution loop transitions
• Obstacle avoidance bends around foundations, ducts and existing services
• Process piping in water treatment plants and pumping stations
• Long-radius water transmission mains and gas distribution loops

• Mandrel-bent seamless construction — continuous wall, no mould parting line, no weld seam
• Smooth bore — lower head loss and less turbulence than a sharp-moulded elbow
• Custom radius — 1.5D to 5D standard, up to 10D on request; custom angles available
• Water PN16 / Gas 10 Bar — dual certified per EN 12201-3 / EN 1555-3
• Full wall thickness at bend — no thinning or ovalisation beyond PE100 tolerance
• Butt fusion ends — same pipe OD, welds directly to PE100 pipe per DVS 2207
• One-piece virgin PE100 — batch-coded, traceable to Borealis/Ineos resin

Moulded elbow: injection-moulded, short radius, parting line visible, lowest cost for tight turns. Multi bend: pre-fabricated long-radius sweep for HDD crossings and deep burial. Seamless bend: mandrel-bent from pipe stock — smooth continuous wall, tunable radius, ideal for snake runs, district heating and obstacle avoidance where flow quality matters.

Note: sizes d20–50 and d355–500 available to order. Custom radius (up to 10D), custom angle (30°/45°/60° etc.) and special CLR (centerline radius) produced on request. Send your dimension drawing for quote.

All spigot fittings are manufactured from certified PE100 virgin material and tested against international piping system standards. Production is backed by ISO 9001 and ISO 29001 quality management systems.

• EN 1555-3 — Plastics piping systems for gas supply — Polyethylene (PE) — Part 3: Fittings (up to 10 Bar)
• EN 12201-3 — Plastics piping systems for water supply — Polyethylene (PE) — Part 3: Fittings (PN16)
• ISO 4427-3 — Plastics piping systems for water supply — Polyethylene (PE) — Part 3: Fittings
• DVS 2207 / ISO 21307 — Butt fusion jointing procedures for PE pipes and fittings
• ISO 9001 / ISO 29001 — Quality management for pipeline product manufacture

Note: SDR 11 seamless bends are rated Water PN16 / Gas 10 Bar. Custom radii beyond 5D produced to project specification. Certificates on request.

Seamless bends are longer than moulded elbows — they ship as "long length" cargo. Standard radius bends stack efficiently; custom large-radius bends may require open-top containers or flat racks.

We stand behind the quality of our spigot fittings. Our commitment doesn't end at delivery — we provide welding, radius selection and installation technical support for your PE pipeline project.

Common questions about our PE100 seamless bends