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Division 2.4

United Kingdom

Original text. Later amendments are not shown.

The use of fibrous absorbent material is permitted in the construction of silencers only where the following conditions are fulfilled:

  1. 2.4.1.

    the fibrous absorbent material may not be placed in those parts of the silencer through which gases pass;

  2. 2.4.2.

    suitable devices must ensure that the fibrous absorbent material is kept in place for the whole time that the silencer is being used;

  3. 2.4.3.

    the fibrous absorbent material must be resistant to a temperature at least 20 % higher than the operating temperature (degrees C) which may occur in the region of the silencer where those fibrous absorbent materials are situated.