USES AND APPLICATIONS OF ASBESTOS
| Material and Products |
Fibre Type (% W/W) |
| ASBESTOS CEMENT
Flat and corrugated
sheets, tiles, drainage and rainwater pipes, gutters,
flues for boilers and ascots, high pressure water pipes,
steam pipes, water tanks, wall ventilators, fire surrounds. |
10-15% Chrysotile,
although some products (especially high pressure applications)
contain Crocidolite. |
| INSULATION
BOARDS
eg. Asbestolux, LDR, Marinite and Turnabestos
Cladding for walls, ceilings and structural
steelworks. Acoustic and thermal insulation.
Fire retardation. Sometimes found in the
form of shipboards. |
20-40% total asbestos.
Usually Amosite, but may also contain small proportion of Chrysotile
or Crocidolite. |
| LAGGING (TO
PIPES, BOILERS AND CALORIFIERS)
Pre-formed sections and slabs or wet plastering.
Note that asbestos ropes, tapes, corrugated papers, quilts,
felts and blankets are also found lagging boilers, etc.
In the past, woven asbestos quilts filled with loose asbestos
were sometimes used for insulation of hot water cylinders,
calorifeisrs, etc. |
Up to 90% Chrysotile,
Amosite or Crocidolite. May be combined with Magnesia for high
temperature applications (boiler casings, steam pipes, etc). |
| SPRAYED COATINGS
Fire protection to structural steelwork,
thermal and acoustic insulation, condensation prevention. |
Up to 85% Crocidolite,
Amosite or Chrysotile. |
CAULKING MATERIALS
(JOINTINGS AND PACKINGS)
Found anywhere a fireproof seal is needed
eg. ovens, sections of system built dwellings, sealing
holes in service ducts, joints to soil pipes ("PC4"). |
30-80% Chrysotile or
Amosite. Sometimes mixed with rubber compounds, cement or plaster. |
| ASBESTOS YARNS
AND ROPES
Mainly used to seal joints (eg. boilers,
flues, chimneys, etc.) as a rot-free fire stop (eg. where
pipes go through a wall) or between components in plant
and machinery. |
65-100% Chrysotile. |
| ASBESTOS CLOTHS
AND TEXTILES
Fire blankets, fireproof clothing, oven
gloves, safety curtains and blankets. |
65-100% Chrysotile
, but Crocidolite was also used. |
| ASBESTOS PAPER
Electrical insulation, (eg. in switchgear),
fireproof facings, heat reflective layers to boilers and
electric storage heaters. |
Up to 100% Chrysotile. |
| MILLBOARDS
Mainly used for thermal insulation eg.
steam pipes, industrial ovens, sheet metal ductwork in
industrial heating systems, cylinder head gaskets, etc. |
45-100% Chrysotile. |
| GASKETS |
Approximately 70% asbestos
plus rubber compounds and fillers. Normally Chrysotile but
Crocidolite is also likely. |
| FRICTION PRODUCTS
Brake linings (road and rail vehicles,
lifts and other machinery). Clutch facings. |
Older products contained
30-70% Chrysotile but recent materials contain much less. |
| ASBESTOS REINFORCED
PLASTICS
Produced as pellets which are then re-liquefied
and used to make injection mouldings, especially in the
motor industry. Also battery cases. |
50-70% Chrysotile. |
| ASBESTOS/VINYL
FLOOR TILES
Also backing to PVC floor coverings - "Lino" |
7-10% Chrysotile
(older types up to 20%). |
| REINFORCED ROOFING
FELT AND DPC |
8-10% Chrysotile. |
| PAINTS AND SURFACE
COVERINGS eg"Artex" |
4% Chrysotile, but
note that Artex "AX" is now asbestos free. |
For more information see our Asbestos
Section on our web site, or contact us at Voelcker Consultants
|