Armaflex Class O Pipe Insulation 54mm x 13mm

Armaflex Class O Pipe Insulation 54mm x 13mm is made for 54mm copper and gives it 13mm of foam all round. As a light grade, it is a sensible choice for heating mains inside warm buildings, where it trims heat loss without adding much bulk.

Armaflex Class O Pipe Insulation 54mm x 13mm on copper mains

In commercial work, 54mm copper is often the main heating or water distribution size. Inside heated spaces, the thin wall cuts wasted heat and keeps ceiling voids from getting too warm. If the main runs into a cold area, switch to a thicker wall for that stretch.

• Bore to fit 54mm copper
• 13mm closed-cell wall
• About 80mm overall fitted
• Sold in 2 metre lengths

The finished size is around 80mm, which suits most bracket spacings. If the pipe is not yet fixed, slide the lengths on first. On pipe already clipped up, split the tube, put it round the pipe and glue the seam with Armaflex 520 adhesive. Make up short pieces for tees and bends. There are more sizes in our pipes, hoses and insulation range.

Collection in Glasgow

Plumb Parts sells this as a collection item. Order it online or ask for it at 555 South Street, Glasgow G14 0QX, open Mon-Fri 8am-5pm and Sat-Sun 8am-1pm.

Specification

• Brand: Armaflex
• Range: Class O pipe insulation
• Material: Flexible closed cell elastomeric (nitrile rubber) foam
• Sizes: 54mm bore, 13mm wall, 2m lengths
• Standard or approval: Class O fire performance, as named
• Suitable for: Insulating 54mm pipe

Common Questions

Is this insulation Class O rated? Yes, it’s Class O to BS 476 Parts 6 and 7. It also holds a Euroclass of B-s3, d0 to EN 13501-1.

What is elastomeric pipe insulation? It’s a flexible, rubbery foam, in this case closed cell nitrile rubber from Armacell. It keeps water vapour out well and has no fibres, so it’s clean to handle.

How thick is the insulation? The foam wall is 13mm, a handy all-rounder for heating and hot water and for stopping cold pipes sweating in warm rooms. Go thicker in cold lofts or on chilled lines, or follow the spec if one sets a figure.

What pipe does this fit? It’s for 54mm copper, as the bore matches the outside of the pipe. Fitted, it comes to about 80mm across, which is worth knowing when you pick clips and drill holes.

How do I glue the joints? Use Armaflex adhesive on any seam you’ve slit and on the butt ends where two lengths meet. Sealing both leaves no gaps for heat to escape or condensation to start.

How does pipe insulation work? The foam is packed with tiny sealed cells that slow heat passing through it, and Armacell quote 0.033 W/(m.K) at 0°C for this tube. That keeps hot pipes hot and stops cold pipes picking up warmth and moisture.

What temperatures can it handle? Armacell rate it from -50°C up to +110°C, so it covers heating, hot and cold water, chilled water and refrigeration pipework.