Armaflex Class O Pipe Insulation 54mm x 19mm

Armaflex Class O Pipe Insulation 54mm x 19mm lags 54mm copper with 19mm of sealed foam. It is a regular on commercial distribution runs, where a large main crosses cooler voids or corridors and needs more cover than the light grade gives.

How Armaflex Class O Pipe Insulation 54mm x 19mm is fitted

Large bores are easier to lag after the pipe is clipped. Cut along one side, open the tube round the copper and coat both cut faces with Armaflex 520 adhesive. Give the glue a few minutes to go tacky before closing the seam. Treat the ends where lengths meet, and cut mitres at bends so the corners stay closed.

• For 54mm copper pipe
• 19mm wall thickness
• Fitted size about 92mm
• 2 metre lengths

The 19mm wall slows heat loss on warm mains and stops cold mains sweating in most indoor conditions. At about 92mm across when fitted, leave enough room between neighbouring pipes and at wall sleeves. Other bores and walls are in pipes, hoses and insulation.

Buying in Glasgow

Collect this from Plumb Parts at 555 South Street, Glasgow G14 0QX, open Mon-Fri 8am-5pm and Sat-Sun 8am-1pm, or you can pay online and pick it up there.

Specification

• Brand: Armaflex
• Range: Class O pipe insulation
• Material: Flexible closed cell elastomeric (nitrile rubber) foam
• Sizes: 54mm bore, 19mm wall, 2m lengths
• Standard or approval: Class O fire performance, as named
• Suitable for: Insulating 54mm pipe

Common Questions

Is 54mm x 19mm a good all round grade?

Yes, it suits 54mm copper heating and water mains in most areas, including cooler voids. It is the middle wall of the three.

How is it fitted on a new 54mm run?

Slide unslit tube on before the last joints are pressed or soldered, and glue the butt joints. Keep it clear of any flame.

Does it need a vapour barrier on cold pipes?

No separate barrier is needed on 54mm cold pipe, because closed cell foam resists vapour by itself. That only works if every joint and seam is glued.