Technical details

LD

S

8.270

Leak monitoring system

s

Leak monitoring: Checking the plant

Procedure

Testing the leak monitoring system

After it has been installed and put into operation as well a

s

following maintenance work, a check must be made on th

e

leak monitoring system/leak detector to ascertain whether i

t

functions as foreseen and safely. The check must also includ

e

a test of free passage in the suction or positive pressure tubin

g

and in the measuring lead between leak detector and sur-

veillance space as well as the test valves. The complete plan

t

(surveillance space with connection pipes and leak detector)

must be tested for tightness by connecting a measuring devic

e

with an accuracy of at least Class 1.6 to the test sockets of the

leak detector.

The operating and functional safety of the leak detector in its

mechanical-pneumatic and electrical part must be determine

d

by measuring the switching values of the vacuum or positiv

e

pressure switch and by checking the transport level of the reg

-

ulating pump set out in the documentation of the leak detector

.

The pressure rise or drop in the surveillance space are to be

measured via the test

fitting on the leak detector. In this way

the free passage test of connection pipes (suction or positiv

e

pressure tubing and the measuring lead) is also given. Th

e

triggering of the optical and acoustic alarm signals by the leak

detectors must also be determined.

The

fittings and accessory components necessary and pre-

scribed for the operation of the leak monitoring device (e.g. dr

y

filter, fluid barriers, condensate containers) are also to be test

-

ed for functional and operational safety.

A tests report must be drawn up on the test of the leak moni-

toring device

.

The further Worksheets give details of the systematic check

-

ing procedures for the systems of the various leak monitorin

g

devices

.

Double-walled piping with vacuum leak detector

Double-walled piping with positive pressure leak detecto

r

Any defects in the leak monitoring system which cannot be

rectified during the check must be mentioned in the test re-

port. The plant operator must be explicitly informed of such

findings. The plant operator shall receive a copy of the test re

-

port, another goes to the specialist firm and is kept there

.

The manufacturer of the leak detector prescribes a mainte

-

nance check of the leak detector repeated every year by a spe-

cialist firm acc. to §§ 62/63 WHG in order to ensure functional

and operational safety

.

31.03.2026 Subject to technical changes. Page 32