BS 5422:2009 pdf free download – Method for specifying thermal insulating materials for pipes, tanks, vessels, ductwork and equipment operating within the temperature range – 40 °C to +700 °C.
NOTE 5 For further details see 855970.
5.7 Tests on physical properties
Where particular physical properties are required the specifier shall nominate the appropriate British Standard test methods. Only where no suitable British Standard test methods exist shall the specifier authorize the use of an alternative test method to determine whether the required level of performance is met.
6 Refrigeration applications
6.1 Information to be supplied by the specifier
The specifier shall supply details of the intended function and performance requirements of the application, and the materials to be used, in accordance with Clause 4.
NOTE In addition to the parameters outlined in Clause 4, items such as specific heat capacity and mass flow rates of fluids may also be required under certain circumstances, particularly where calculating from first principles using 85 EN ISO 1224 1:1998. However, these additional parameters are not required for the use of the tables contained in this standard.
6.2 Physical characteristics
6.2.1 General
The physical characteristics of the insulating material including finishing materials and vapour barriers, whether applied during manufacture or on site, shall conform to 5.1, 6.2.2 and 6.2.3.
Insulation materials and systems used for refrigeration shall conform to the following requirements.
NOTE 1 Attention is drawn to the applicable requirements of the
Building Regulations [5], the Building (Scotland) Regulations [3] and the
Building Regulations (Northern Ireland) [6].
Insulation systems on pipework or ductwork traversing a fire-resisting division shall maintain the level of fire resistance of the wall, floor or cavity barrier through which they pass.
NOTE 2 In the event of a fire some insulation systems can generate appreciable quantities of smoke and toxic fumes. Consideration should be given to the choice of materials bearing in mind their location, e.g. enclosed areas or adjacent to air ducts through which the smoke or fumes may spread.
In buildings other than dwellings, the complete assembly of installed insulation materials (whether faced or unfaced) shall be Class 0 (national class) or better.
In dwellings, the complete assembly of installed insulation materials (whether faced or unfaced) shall be Class 1 (national class) or better.
For faced or over-clad materials, which are not Class 1 (national class) or better when tested without the facing, particular care shall be taken with the facing to ensure that all joints and seams, etc., are fitted correctly, so that the underlying insulation is not left exposed to a potential ignition source. Where the complete assembly is liable to mechanical damage in use, the final finish shall be sufficiently strong to ensure that the insulation does not become exposed.
If there is a potential hazard from contamination by oil or other flammable chemicals, a suitably resistant finish, e.g. a metal sheet or appropriate non-absorbent coating, shall be applied over the vulnerable areas. The lapped joints of sheet finishes shall be arranged to shed contaminating fluids away from the insulating material.
In underground or windowless buildings, the underlying thermal insulation material used for external insulation of ventilation ductwork or pipes greater than 100 mm nominal bore shall itself be of “limited combustibility” or be “non-combustible”. In addition, the complete assembly of installed insulation materials (whether faced or unfaced) shall be Class 0 (national class) or better.
NOTE 3 See Annex E for an explanation of “limited combustibility”, “non combustible”. Class 0 and Class 1 (national classes) and Classes Al, A2, B, C, D, E or F (European classes).