Pressure Testing The Pipeline Section - Mankenberg UV 5.1 ATEX H2 Betriebsanleitung

Supplement to the Operating Instructions for
Back pressure regulators UV 5.1 ATEX H2
The connecting surfaces on the body of the fitting are formed in accordance with the
MANKENBERG order confirmation. The required seals are generally not included in the
MANKENBERG supply schedule..
note
with welding ends:
» Properly performed welding must ensure that no significant tension is transferred to either the section of
pipeline or the body of the fitting.
» Under no circumstances may the body of the fitting exceed the temperature marked on it; otherwise the
sealing and functional parts will be damaged and the whole fitting will become unserviceable.
When a fitting with a body made of "high grade" or "high grade pure" deep-drawn parts (vi-
sible on the body connection with clamp rings) is welded, the welding joint must be carried out
with special care; it is recommended that the body should be kept cool with a damp cloth.
caution
Failure to observe this instruction may cause distortion of the fitting body:
even 0.1 mm of permanent distortion in the seat region may render the fitting unserviceable.
» If available, connect control and/or leakage line.
If the leakage line is not connected, the medium will be leaking in the event of damage.
The non-fitted leakage line connection must not be closed under any circumstances. This may
result in improper control behavior of the valve.
note
Keep the leakage line connection free from external influences such as water, dirt or insects.

8 Pressure testing the pipeline section

The fitting has already been pressure-tested by the manufacturer. The following points should be observed
when conducting a pressure test on a pipeline section with a pressure-regulating valve installed:
» Pressure-reducing valve: the test pressure must not exceed 1.5 times the max. adjustable outlet pressure,
e.g. a setting range of 4 to 8 bar gives a max. permitted test pressure of 8 bar x 1.5 = 12 bar.
» The test pressure on the inlet pressure side is determined by the pressure marked on the body, in
addition, the permitted reducing rate has to be observed (see order confirmation).
» Back pressure regulator: the test pressure must not exceed 1.5 times the max. adjustable inlet pressure,
e.g. a setting range of 4 to 8 bar gives a max. permitted test pressure of 8 bar x 1.5 = 12 bar.
» Vacuum control valve: the test pressure must not exceed 1.5 times the max. adjustable pressure. The
information described above should be observed according to whether a pressure-reducing or back
pressure regulator forms the basis for the vacuum control valve.
» Differential pressure control valve: the test pressure must not exceed 1.5 times the max. adjustable
pressure. The information described above should be observed according to whether a pressure-reducing
or back pressure regulator forms the basis for the differential pressure control valve.
» Flow control valve: the test pressure must not exceed 1.5 times the max. adjustable pressure. The
information described above should be observed according to whether a pressure-reducing or back
pressure regulator forms the basis for the flow control valve.
» Under no circumstances may the test pressure exceed 1.5 times the value indicated on the body
with "PN" or "Class".
UV 5.1 ATEX H2-4.X.22.5 Issue 21.12.2022
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