Emerson 00809-0100-4102 manual Bolt Installation Torque Values

Section 3: Installation	Reference Manual
May 2013	00809-0100-4102, Rev AA

Bolt installation

Only use bolts supplied with the Rosemount 2051 or sold by Emerson Process Management as spare parts. When installing the transmitter to one of the optional mounting brackets, torque the bolts to 125 in-lb. (0,9 N-m). Use the following bolt installation procedure:

1.Finger-tighten the bolts.

2.Torque the bolts to the initial torque value using a crossing pattern.

3.Torque the bolts to the final torque value using the same crossing pattern. Torque values for the flange and manifold adapter bolts are as follows:

Table 3-2. Bolt Installation Torque Values

	Bolt Material	Initial Torque Value	Final Torque Value
	CS-ASTM-A445 Standard	300 in.-lb (34 N-m)	650 in.-lb (73 N-m)
	316 SST—Option L4	150 in.-lb (17 N-m)	300 in.-lb (34 N-m)
	ASTM-A-193-B7M—Option L5	300 in.-lb (34 N-m)	650 in.-lb (73 N-m)
	Alloy K-500—Option L6	300 in.-lb (34 N-m)	650 in.-lb (73 N-m)
	ASTM-A-453-660—Option L7	150 in.-lb (17 N-m)	300 in.-lb (34 N-m)
	ASTM-A-193-B8M—Option L8	150 in.-lb (17 N-m)	300 in.-lb (34 N-m)
Figure 3-6. Traditional flange bolt configurations
A			B

C C

D C

Note	E	F	E	F
Dimensions are in inches

A. Differential Transmitter

B. Gage/Absolute Transmitter

C.Drain/Vent

D.Vented fitting

E.1.75 (44) × 4

F.1.50 (38) × 4(1)

(1)For Gage and Absolute Transmitters: 150 (38) x 2

38 Installation