Emerson Process Management 2051 manual Rosemount, Reference Manual, 00809-0200-4101,Rev AA July

Reference Manual

00809-0200-4101, Rev AA July 2008

Rosemount 2051

Flange Bolts

The 2051 is shipped with a Coplanar flange installed with four 1.75-in. (44

mm)flange bolts. See Figure 2-6 and Figure 2-7 on pages 2-14 and 2-14. Stainless steel bolts are coated with a lubricant to ease installation. Carbon steel bolts do not require lubrication. No additional lubricant should be applied when installing either type of bolt. Bolts are identified by their head markings:

B7M

316 B8M F593_*

Carbon Steel (CS) Head Markings

Stainless Steel (SST) Head Markings

*The last digit in the F593_ head marking may be any letter between A and M.

Bolt Installation

Only use bolts supplied with the 2051 or provided 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 2-3. Bolt Installation

Torque Values	Bolt Material	Initial Torque	Value	Final Torque Value
	CS-ASTM-A449 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)
	ASTM-A-193 Class 2, Grade	150 in.-lb (17	N-m)	300 in.-lb (34 N-m)
	B8M—Option L8

See “Safety Messages” on page 2-1 for complete warning information.

2-13