Figure 2-5. Bolt Tightening Sequence; Table 2-1. Recommended Mounting-Bolt Torques - ABB MINI-MAG 10D1475 Series Instruction Manual

10D1475 MINI-MAG MAGNETIC FLOWMETER INSTRUCTION MANUAL
For 4-bolt and 8-bolt flanges, tighten the flange bolts in a "star" pattern as shown in Figure 2-5 to
avoid localized stresses on the gaskets. The bolts and nuts should be tightened approximately 50%
during the first pass, approximately 80% during the second pass and to full tightness during the third
pass.

FIGURE 2-5. BOLT TIGHTENING SEQUENCE

All 1/10 - 1/2 inch (3 - 15 mm) size Magnetic Flowmeters are supplied

TABLE 2-1. RECOMMENDED MOUNTING-BOLT TORQUES

Meter
Size
<1/2
3/4
1 1/4
1 1/2
2 1/2
INSTALLATION
NOTE
for use with 1/2 inch (15 mm) pipe flange.
ANSI Class
150
# of
Holes ft. lbs. Nm
4 10 15
4 10 15
1 4 10 15
4 15 20
4 15 20
2 4 25 35
4 30 40
3 4 40 55
4 8 30 40
ANSI Class
300
# of
Holes ft. lbs. Nm
4 15 20
4 15 20
4 15 20
4 20 25
4 25 35
8 15 20
8 20 25
8 30 40
8 45 60
2-7