Inner coatings (as partial or full surface coatings) are applied to the inner surfaces of stationary steel tanks for the storage of liquids hazardous to water to make them liquid-tight.

Similarly, the inner surface can be lined with a rubber lining to make it liquid-tight.

Regulatory framework

Inner coatings and rubber linings for steel tanks for substances hazardous to water fall under the Ordinance on the determination of the suitability of construction products and construction techniques under water law by means of verifications in accordance with the Building Codes of the federal states (WasBauPVO) and under the Ordinance on facilities for handling substances hazardous to water (AwSV).

DIBt grants national technical approvals (abZ) and/or general construction technique permits (aBG) for these products and construction techniques, confirming that both the construction and the water law requirements have been met. The products and construction techniques are thus deemed to be suitable in accordance with Section 63 of the Water Resources Act (WHG).

Please also note the applicable provisions of the federal states following MVV TB, B 4.1 'Technical requirements for stationary systems and system parts used in storage, filling and handling facilities for substances hazardous to water'.