Pipe Connections; Table 2-1. Recommended Bolt Torques - ABB 3000 Series Instruction Manual

2.4.2 Pipe Connections

The TEFLON and polyurethane lined meters have ANSI raised faced flanges rated as Class 150. The
neoprene lined meters have ANSI full faced flanges rated as Class 150. Two flange gaskets are
supplied per meter; the mounting studs and nuts are furnished by the user.
Fastener threads must be clean and lubricated and flange nuts should be tightened in an alternate
pattern (Refer to Figure 2-4) to produce equal pressure distribution around the flange face. Bolt
torque should be limited to the values shown in TABLE 2-1 for the liner materials shown. PTFE lined
meters should be retorqued after 24 hours. Due to their resiliency, Polyurethane and Neoprene lined
meter bolts should be tightened to 1/2 the values listed in TABLE 2-1. Additional tightening up to the
values listed may be necessary to achieve an effective seal.
10DS3111A INSTRUCTION MANUAL
FIGURE 2-4. FLANGE BOLT

TABLE 2-1. RECOMMENDED BOLT TORQUES

METER SIZE PTFE TEFLON, HARD RUBBER
14 in.
16 in.
18 in.
20 in.
24 in.
ft-lbs (Nm)
120 (160)
115 (155)
175 (240)
155 (210)
220 (300)
2-5