Exhaust system, verification class according to DIN EN 1856 (metal exhaust systems)

The product marking of a manufacturer for flue gas systems according to DIN EN 1856 (metal flue system) is largely identical to the system marking according to DIN V 18160-1 for erected systems, but differs in the area of corrosion resistance.

In the case of metal exhaust systems according to DIN EN 1856, the corrosion resistance is indicated by means of the verification class (V1, V2, V3 or Vm) and additionally supplemented by the material designation of the inner tube.

According to DIN V 18160-1, Supplement 1, the following assignments apply:

• V1 = corrosion class 1 (D+W)
• V2 = corrosion class 1 (D+W), corrosion class 2 (D+W) and corrosion class 3 (D)
• V3 = corrosion class 1 (D), corrosion class 2 (D) and corrosion class 3 (D)

D stands for "dry".

W stands for "wet".

Vm: With the indication of the verification class Vm, a restriction to certain manufacturing processes and wall thicknesses is specified for the use of metal components. Detailed tables with information on all relevant materials are listed in DIN V 18160-1, Supplement 1.

Definition of corrosion resistance classes see lexicon article ►Flue system, corrosion resistance classes according to DIN V 18160-1.

Source: bauwion