Nominal flow rates and flange sizes

Nominal meter size 1 bar pd nominal flow range
[kg/h]
Proposed flange size
DIN / JIS
Proposed flange size
ASME
8 600 10, 15 1/2"
10 1200 10, 15 1/2"
15 3800 15, 20, 25 1/2", 3/4", 1"
25 19000 25, 40 1", 1.5"
50 35000 40, 50 1.5", 2"
80 78000 50, 80 2", 3"
100 175000 80, 100 3", 4"
150 (pending) 320000 100, 150 4", 6"
200 (pending) 550000 150, 200 6", 8"
250 (pending) 1000000 250, 300 10", 12"

Accuracy

0.1 % flat-line accuracy for 20:1 turndown from nominal flow
0.05 % flat-line accuracy for 10:1 turndown from nominal flow
Below 1/20th of nominal flow rate: 0.1 % +/- zero stability

Maximum flow rate

Up to 150 % of nominal flow