System description

Leak monitoring for double-walled piping

The leak monitoring

Double-walled piping is permanently monitored using pneu-

matic leak detecting devices. These regulate the monitoring

pressure in the surveillance space and register any changes

of pressure which may occur. The surveillance space prevents

uncontrolled spillages of the transport medium when leaks

occur. The surveillance space must be so constructed that

the functioning and operative security of the leak monitoring

system (the leak detector) is assured at all times. The size if

the surveillance space for each leak detector is limited to 10 m

3

acc. to DIN EN 13160.

If the pipe is damaged the alarm is given by acoustic and

optical signals.

Definition of leak detection equipment/leak detector

“Leak detection equipment/leak detector” according to the

currently valid regulations refers to a device which automati-

cally and under all operating conditions gives warning of leaks

in the walls of double-walled piping in which water hazardous

(flammable and non-flammable) fluids are transported. The

term “leak detection equipment/leak detector” includes all the

equipment necessary for the detection of leaks.

The main components are:

- the leak detector/leak monitoring equipment

- the connection between the surveillance space and

leak detector

- double-walled piping:

FLEXWELL® Safety Pipe

BRUGG-STAMANT® Safety Pipe

SECON®-X Petrol station pipe

- the surveillance space

- a leak detection medium

The use of this system complies with the most stringent

European safety standards (Class 1). Systems of this class

give warning of a leak above or below the fluid level in a

double-walled protective system. They are constructed on

the principles of absolute safety and ensure that spillages

of products into the environment cannot occur.

Leak detector

We distinguish two types of differential pressure leak detection

equipment: Leak surveillance to detect leaks in double-walled

piping on the vacuum principle and on the positive pressure

principle.

10.05.2021

Subject to technical changes.

Page 2

double-walled

piping with

vacuum leak

detector

double-walled

piping with

positive pressure

leak detector

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DLR-

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