Quality and Test Specifications

Scope

These Quality and Test Specifications are applicable for the assembly and maintenance1) of public and private drains and sewers and the associated structures.

 

General conditions

The construction and maintenance of wastewater pipes and sewers are governed by the generally accepted rules of the art (a.a.R.d.T.). 

 

Quality specifications

Execution areas and appraisal groups

If the requirements on one of the following service groups are met, an enterprise/an organisation (public institution /engineering office) is classified in the appraisal group of the same name.

 

 

Open sewer construction (AK)

Execution area AK3

 

Installation of wastewater pipes and sewers of different materials in open construction with the associated structures at a characteristic depth of the excavation base of up to 3 m.

 

Execution area AK3 is a constituent part of execution areas AK2 and AK1.

 

Execution area AK2

 

IInstallation of wastewater pipes and sewers of different materials in open construction with the associated structures at a characteristic depth of the excavation base of up to 5 m, also under difficult conditions2).

 

Quality mark holders of group AK2 meet the requirements of group AK3. Execution area AK3 is a constituent part of execution area AK2.

 

Execution area AK1

 

Installation of wastewater pipes and sewers of different materials in open construction with the associated structures, in particular at a characteristic depth of the excavation pit bottom of more than 5 m under difficult conditions2) and using technically demanding construction methods3.

 

Quality mark holders of group AK1 meet the requirements of groups AK2 and AK3. Execution areas AK3 and AK2 are a constituent part of execution area AK1.

Tunneling (V)

Execution area VP

Trenchless installation of wastewater pipes and sewers using controllable pilot pipe methods and comparable controllable methods.

 

A limitation to product pipes ≤ DN 150 is stated on the award certificate.

 

Execution area VM

Trenchless unmanned installation of wastewater pipes and sewers using controllable methods in micro-tunnelling using augers and slurry conveyors.

 

Quality mark holders of group VMD also meet the requirements of group VM.

 

Execution area VMD

Trenchless installation of wastewater pipes and sewers using enclosed controllable shields and support of the heading face through liquid using compressed air or earth pressure (e.g. mix or EPB shield).

 

Quality mark holders of group VMD also meet the requirements of group VM.

 

Execution area VO

Trenchless manned installation of wastewater pipes and sewers using open controllable shields without compressed air or manned installation based on mining construction techniques. A limitation to mining construction techniques is stated on the award certificate.

 

Quality mark holders of group VOD also meet the requirements of group VO.

 

Execution area VOD

Trenchless manned installation of wastewater pipes and sewers using open controllable shields under compressed air.

 

Quality mark holders of group VOD also meet the requirements of group VO.

Rehabilitation (S)

Execution area S

TTrenchless rehabilitation of wastewater pipes and sewers of all materials and nominal widths with the associated structures. Sewer construction quality marks of appraisal group S. are awarded for the handling of one individual rehabilitation method. The methods are stated on the award certificate.

Inspection (I)

Execution area I

Inspection of wastewater pipes and sewers of all materials and nominal widths with the associated structures.

Cleaning (R)

Execution area R

Cleaning of wastewater pipes and sewers of all materials and nominal widths with the associated structures.

Leakage testing (D)

Execution area D

Leakage testing of wastewater pipes and sewers of all materials and nominal widths with the associated structures.

Tendering and construction monitoring in open construction (ABAK)

Execution area ABAK

Tendering and construction monitoring in the installation and testing of wastewater pipes and sewers of all materials and nominal widths in open construction with the associated structures.

Tendering and construction monitoring in trenchless laying (ABV)

Execution area ABV

Tendering and construction monitoring in the trenchless installation and testing of wastewater pipes and sewers of all materials and nominal widths with the associated structures.

Tendering and construction monitoring in trenchless rehabilitation (ABS)

Execution area ABS

Tendering and construction monitoring in the trenchless rehabilitation of wastewater pipes and sewers of all materials and nominal widths with the associated structures.