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ALK
Regulations:
The order of 14 December 1989 pertaining to the application of directive 87/404/EC
stipulates in article 11 – 2: "The tank must be fixed to the vehicle by straps or clamps
with none of their metal parts being in direct contact with the tank wall, so as to avoid any
friction between this wall and any part of the vehicle. The tank must be suitably protected
against impacts and spray from the road surface." ALK manufactures and sells clamps
with a protection capable of avoiding any friction or direct contact with the tank casing.
Our clamps are coated with Polyamide 11 or 12, Rubber or Rilsan. These materials have
good resistance to hydrocarbons, oils, natural ageing, UV and low sensitivity to damp.
History:
A few years ago, manufacturers used "foam strips" between clamps and tanks. These
products are tending to be discontinued, as the foam absorbs damp, salt in winter and
causes corrosion spots on the tanks. These products have been replaced by more
technical products: Polyamide, Rilsan, Rubber, which do not have these disadvantages.
Paint is not allowed, as the coating thickness of around 50 microns is too thin and it
dilutes with some products (e.g.: Diesel, Petrol); it also has poor resistance to friction.
Polyamide, which is on some of our products, has an average thickness of 800 microns
and rubber has an average thickness of 2 mm.
Salt Spray Test:
Products in the 70.xxx.xxZ, 71.xxx.xx, 72.xxx.xx, 73.xxx.xxZ, 75.xxx.xx, 76.xxx.
xx, 77.xxx.xx, 84.xxx.xx, 88.xxx.xxZ, 92.xxx.xx, 95.xxx.xxZ, 96.xxx.xxZ, 97.xxx.xxZ,
98.xxx.xx, 99.xxx.xx ranges have undergone salt spray tests in accordance with the
ISO 9227 standard. These products have been tested for between 100 and 300 hours
depending on the product ranges and have fulfilled these test requirements in every
respect. At your request, for these product ranges, we can provide you with certificates in
the form of “Test Reports” issued by a French industrial analysis laboratory.