MCU14/0056 Response to SARA - Consulting Report

EN 858-1:2002 (E)

6.3.2 Watertightness of components

All components of a separator system (including joints, seals, connections and partitions) shall be watertight and
the separator system including extension shafts shall be tested in accordance with 8.2.

6.3.3 Accessibility

The separator system including the inlet and outlet areas of the sludge trap and separator shall be accessible for
maintenance and inspection. Extension shafts and access openings shall be provided to allow the removal of light
liquids and any settled material. Their dimensions shal! comply with the requirements for manholes and inspection
chambers as given in EN 476.

On separator equal to or greater than NS 10 there shall be at feast one access point in compliance with clause 7.3
of EN 124:1994.

6.3.4 Water seals

Water seals shall be provided at the inlet and outlet of the separator. The depth of the water seal shall be a
minimum of 100 mm.

Where the separator and sludge trap are combined, the inlet seal may be provided either at the sludge trap or at
the separator.

6.3.5 Pipes and pipe joints

The minimum nominal diameters DN,,in of the inlet(s) and outlet(s) for the separator system shall be selected from
table 2 and compatible with standardized pipe systems.

Table 2— Pipe minimum nominal diametersDNwain

 

 

 

 

 

 

 

 

 

 

Nominal size DN nin 2
up to and including NS 3 100

Over NS 3 up to and including NS 6 125

Over NS 6 up to and including NS 10 | 150

Over NS 10 up to and including NS 20 | 200

Over NS 20 up to and including NS 30 | 250

Over NS 30 up to and including NS 100 | 300

Over NS 100 400

a The nominal diameter can apply to either the internal or
external pipe diameter.

 

 

 

Provision shalt be made for possible ground movement and settlement when joining inlet, outlet and connection
pipes.

6.3.6 Internal components
Provision shall be made for cleaning the internal components using pressurized air or water. Parts which need to

be removed for maintenance shall be accessible and easily removed. Any oil retained in the separator system shall
be prevented from entering the outlet pipe.

6.3.7 Sludge traps

Sludge traps shall be constructed with a flow-control device at the inlet to reduce the inflow velocity and provide a
uniform flow pattern. This device shall be designed to avoid short circuits and allow sediments to settle.

‘This is a licensed reproduction produced by SAI Global Ltd, an authorized distributor of British Standards 43