Knauf Insulation » Products » Pipe Insulation

Pipe Insulation

For the thermal insulation of a wide range of pipework applications

Description

Pipe Insulation is a one-piece 'snap on' pre-formed mineral wool section of 80 kg/m3 nominal density. It is made from non-combustible, glass mineral wool. It is supplied in 1.2m lengths and in thicknesses from 20 to 60mm to suit the most common sizes of steel pipes specified in BS 1387 and BS 3601-5 and copper pipes specified in BS 2871 – see Product Data table below.

Pipe Insulation is faced with a bright class 'O' facing of reinforced aluminium foil which has a peel and stick flap.

Application

Pipe Insulation is for the thermal and acoustic insulation of copper and steel pipes operating at up to 230°C. It is supplied in sizes to suit the most common pipe sizes with outside diameters from 15mm to 273mm – see Product Data table below. The bright class 'O' facing of reinforced aluminium foil facing and self adhesive flap provide a vapour barrier. Various other finishes may be applied to meet specification requirements.

Standards

The mineral wool of Pipe Insulation is a non-combustible inorganic glass wool, defined as mineral wool in BS 3533: 1981 and is manufactured in accordance with BSI Quality Assurance Standard BS EN ISO 9001: 2000.

Operating Temperatures

Pipe Insulation can be used up to continuous operating temperatures of 230°C and down to cryogenic temperatures provided that a 100% vapour barrier is maintained. The surface temperature of the facing should not exceed 80°C.

Crown Pipe Insulation
Performance

Thermal Performance

Pipe Insulation has a thermal conductivity of 0.031 W/mK at 10°C – see table below

Fire Performance

Pipe Insulation base glass mineral wool is non-combustible to BS 476: Part 4: 1970 (1984) and Class 1 Surface Spread of Flame to BS 476: Part 7: 1997. The glass mineral wool and the foil facing comply with the Class ‘O’ requirements of the Building Regulations when tested to BS 476: Part 6: 1989 and Part 7: 1997.

 

Benefits
 
  • Corrosion free
  • No thermal bridging
  • Non-combustible
  • Speed of installation
 
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Durability

Pipe Insulation is rot proof, does not sustain vermin and will not encourage the growth of fungi, mould or bacteria. Pipe Insulation is odourless and non-hygroscopic.

Thermal performance

Pipe Insulation has one of the lowest thermal conductivities of any mineral wool pipe section and complies with the requirements of the Building Regulations for pipe insulation. The thermal conductivity varies with temperature in accordance with the table to the right.

Mean temperature

°C

Thermal conductivity

(W/mK)

10 0.031
50 0.035
100 0.042
125 0.050

Note: Tested in accordance with BS 874: 1973 (1980).

Acoustic performance

Where there is a need to reduce radiated noise levels from pipework, Pipe Insulation provides effective control. The actual performance varies with insulation thickness and surface finish.

As an example, 50mm thickness of Pipe Insulation under 20 swg mild steel gives an average reduction of over 28 dB. Particular care is required to seal joints and avoid bridging to achieve the best results.

Chloride content

Pipe Insulation contains inherently low levels of chlorides and high levels of stress corrosion inhibitors in the form of sodium ions and silicate ions.

Chlorides are common to most environments and can be deposited on the surface of the insulation from the air or even from operatives' hands. In the presence of water the chlorides can migrate through the insulation and be concentrated on the insulated surface thus increasing the risk of stress corrosion cracking of austenitic stainless steels.

The water resistance of Pipe Insulation helps prevent this migration whilst its natural inhibitors afford additional protection.

Vapour and condensation

Pipe Insulation will help to prevent condensation and protect pipework from freezing when applied in thicknesses as recommended in BS 5422.

Environmental

Pipe Insulation is free from CFCs, HCFCs and any other material with ozone depletion potential in its manufacture and content and represent no known threat to the environment.

Pipe Insulation’s manufacture has a low impact on the environment and is classified as Zero ODP and Zero GWP.

Handling and Storage

Pipe Insulation is easy to handle and install, being lightweight and easily cut to size.

Pipe Insulation is supplied in boxes which are designed for short term protection only. For longer term protection on site, the product should either be stored indoors, or under cover and off the ground. Installation instructions are on every pack.

Pipe Insulation should not be left permanently exposed to the elements.

Product Data

Pipe o/d (mm) Sections per box for the following insulation wall thicknesses:    
20mm 25mm 30mm 35mm 40mm 45mm 50mm 60mm
15 42 32 20 16
17 42 32
21 42 27 20 16 12 10 9
27 30 25 16 12 12 9 9
34 25 20 13 12 9 9 6
42 20 16 12 12 9 6 6
48 18 13 10 9 9 6 5
54 16 12 9 6 5
60 13 10 9 6 6 5 4 9
67 9 6 5 4
75 9 9 6 5 5 4 4 7
80 6 6 5 4 4 9 6
89 6 5 5 4 4 9 6
102 5 4 4 4 4 6 3
108 5 4 4 4 6 6 5
114 4 4 4 4 6 6 3
127 9 6 6 6 5 5 4
140 8 6 6 5 5 5 4
168 5 5 4 4 4 4 4
194 4 4 4 1 1 1
219 4 1 1 1 1 1
273 1 1 1 1 1

All dimensions are nominal

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