BS EN 12889:2000

1   Scope This European Standard is applicable to the trenchless construction and testing of new drains and new sewers in the ground, which are normally operating as gravity pipelines , formed using prefabricated pipes and their joints. The trenchless construction and testing of drains and sewers operating under pressure is also covered by this European Standard together with prEN 805:1999 as appropriate. This European Standard also applies to trenchless replacement techniques. Renovation techniques for existing sewers and drains are not covered by this European Standard. Methods of trenchless construction include

       —  manned and  unmanned techniques ; 
   
   
     
       —  steerable and non-steerable techniques. 
     
       
         NOTE 1:  Mining or tunnelling (e.g. in situ construction or the use of prefabricated segments) are not covered by this European Standard although some parts may apply to these methods. Additional requirements apply for mining and tunnelling methods for the construction of drains and sewers. 
     
   
 

Additionally other local or national regulations should be taken into account, e.g. concerning health and safety, pavement installation, tolerances for deviation in line and level and requirements for leaktightness testing.

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