Armaflex Class O Pipe Insulation 89mm x 13mm

Armaflex Class O Pipe Insulation 89mm x 13mm fits 88.9mm pipe, which means 3 inch steel or 89mm copper, with a 13mm wall of closed-cell foam. The light wall is used on large heating mains inside warm buildings, where cutting heat loss is the main aim.

Armaflex Class O Pipe Insulation 89mm x 13mm for 3 inch mains

3 inch steel is common on older commercial heating systems and in boiler houses. Without lagging, a main that big turns a boiler house into an oven. A 13mm closed-cell wall keeps more of that heat in the water, and its modest size keeps lagged pipes on their existing brackets.

• For 88.9mm pipe (3 inch steel or 89mm copper)
• 13mm wall
• About 115mm overall once fitted
• 2 metre lengths

Clean the pipe, then split and wrap the tube round it. Armaflex 520 glue holds the seam and the ends. Covers for valves and flanges can be cut from offcuts. Where the main crosses an unheated area, a thicker wall is the better choice. Look in pipes, hoses and insulation for other sizes.

Picking it up in Glasgow

Pick this up in person from Plumb Parts, 555 South Street, Glasgow G14 0QX. Order online, then call in 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, 13mm wall, 2m lengths
• Standard or approval: Class O fire performance, as named
• Suitable for: Insulating 89mm pipe

Common Questions

What pipe does 89mm Armaflex fit?

It suits 3 inch steel and other pipe of 88.9 outside diameter. These are big commercial mains, usually in plant rooms and service corridors.

Is 13mm wall enough for a 3 inch heating main?

Inside heated areas it is the slim, light grade that still cuts heat loss. On mains through cold spaces, pick a thicker grade.

How many 89mm x 13mm lengths cover 18m?

Nine 2m lengths for the straight pipe. Large mains have many flanges and valves, so order a few extra.