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1 Introduction
Note
Reduced shaft screws must only be used for devices in the area of applica-
tion of the Pressure Equipment Directive.
The durability of the flange connection was verified using the screws listed in this
26
chapter in combination with the seals listed in the previous chapter with the following
maximum material characteristic data according to AD200 rules and regulations.
Other screw/flange variants were not tested.
Malfunctions can occur with incorrect seals.
1.4.2.3
Cast steel or round steel material, depending on the pressure level and nominal di-
ameter. Aluminum or stainless steel for the screw-type versions.
1.4.2.4
Note
Installations disturbing the gas flow directly upstream of the turbine meter
must be avoided
(see DVGW guideline G 492 II and PTGB guideline G 13).
An inlet pipe of at least 2 x DN is required upstream from the turbine meter TME 400.
The inlet pipe must be designed as a straight pipe section with the same nominal di-
ameter as the meter. With heavy upstream pertubations, installation of straighteners
is recommended (refer to the table on the next page). A pipe or bend with the nomi-
nal diameter of the meter having a total length of 2 x DN must be arranged down-
stream from the meter.
Temperature measuring devices must be installed at a distance of at least 1 x DN or
at least 300 mm with nominal diameters ≥ DN 300.
If there is pertubation (e.g. a gas pressure control device) upstream from the inlet
pipe, a perforated plate straightener is also necessary. Perforated plate straightener
according to ISO 5167-1 or the type RMG LP-35, which cause a pressure loss by a
factor of 2.5 in comparison with the standard straightener, can be used.
Recommended installation with straightener
Manual TME400-VMF · EN11 · January 22nd, 2024
Meter housing material
Installation
Perforated plate straightener LP 35
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