Armaflex Class O Pipe Insulation 89mm x 19mm

For 3 inch steel or 89mm copper, Armaflex Class O Pipe Insulation 89mm x 19mm lags 88.9mm pipe with 19mm of foam. Expect to see it on plant room headers and on large mains through cooler basements and ducts.

How to fit Armaflex Class O Pipe Insulation 89mm x 19mm

Large tubes are fitted after the pipe is in place. Run a long, sharp knife along one side, open the tube round the pipe and coat both cut edges with Armaflex 520 adhesive. When the glue is tacky, squeeze the edges shut. Glue the butt joints too, and cut segments at bends.

• Bore for 88.9mm pipe
• 19mm closed-cell wall
• About 127mm across fitted
• 2 metre tubes

The 19mm wall is a good middle choice for both warm and cold mains in indoor plant spaces. At around 127mm overall, plan for room at brackets and wall sleeves. On steel pipe, brush off loose rust before fitting. Lighter and heavier walls for 88.9mm pipe sit in the pipes, hoses and insulation range.

Buy Armaflex in Glasgow

This item is collection only. Order online and pick it up from Plumb Parts, 555 South Street, Glasgow G14 0QX, Mon-Fri 8am-5pm or Sat-Sun 8am-1pm.

Specification

• Brand: Armaflex
• Range: Class O pipe insulation
• Material: Flexible closed cell elastomeric (nitrile rubber) foam
• Sizes: 89mm bore, 19mm wall, 2m lengths
• Standard or approval: Class O fire performance, as named
• Suitable for: Insulating 89mm pipe

Common Questions

How do I fit Armaflex onto a large 3 inch pipe?

Cut the tube open lengthways and spread it over the 3 inch pipe, then bond the seam with Armaflex adhesive. Two people make it easier on long runs.

Where is the 89mm x 19mm grade used?

On 3 inch heating and cold mains through cooler parts of a building, where the light grade is not enough. It is the middle of the three walls.

Can 89mm Armaflex go outside?

Yes, but protect it from sunlight with a suitable finish, as Armacell advise. Seal every joint against rain.