Inner Diameter Of Connecting Spool Pieces - RMG USM GT400 Operating Manual

Di-1 = inner diameter (tapered, schedule 80)
Di-2 = inner diameter full bore (schedule 40)
1
Maximum diameter at the flange, depending on tapering.
2
Approximate dimension.
3
Approximate values. Weights can vary due to casting tolerances.
An angle of 7° is used for tapering.

13.6 Inner diameter of connecting spool pieces

Connection diameter at tapering of the USM GT400
(= inner diameter for inlet and outlet spool pieces)
Maximum deviation from meter to piping:
+/- 1% acc. MID
For calibrated spool pieces belonging to the measuring instrument, the deviation
may be up to +/- 3%. For the full-bore version, generally +5% / -2% are allowed re-
gardless of the use during calibration.
The blue marked inner diameters for every ANSI pressure rating are to be under-
stood as a recommendation if no inner diameter is specified by the customer.
Meter
size
in DN
/ Inch
80
80
80
80
80
80
100
100
100
100
100
100
100
100
150
150
Pressure Inner
class Diameter
ANSI150 73,7
ANSI150 77,9
ANSI300 73,7
ANSI300 77,9
ANSI600 73,7
ANSI600 77,9
ANSI150RF 97.2
ANSI150RF 102.3
ANSI300RF 97.2
ANSI300RF 102.3
ANSI600RF 97.2
ANSI600RF 102.3
ANSI600RTJ 97.2
ANSI600RTJ 102.3
ANSI150RF 146.4
ANSI150RF 154.1
13 Technical specifications
Min. ID Max. ID Schedule
of spools of spools
73 74,4 80
77,2 78,7 40
73 74,4 80
77,2 78,7 40
73 74,4 80
77,2 78,7 40
96.2 98.2 80
101.3 103.3 40
96.2 98.2 80
101.3 103.3 40
96.2 98.2 80
101.3 103.3 40
96.2 98.2 80
101.3 103.3 40
144.9 147.9 80
152.6 155.6 40
Manual USM GT400 · EN10 · May 2021
189