Emerson Process Management 8732 Nominal Sensor Size Stud Specifications, Centering Rings

Reference Manual

00809-0100-4663, Rev BA January 2010

Rosemount 8732

Table 5-4. Stud Specifications

Nominal Sensor Size	Stud Specifications
0.15 – 1 inch (4 – 25 mm)	316 SST ASTM A193, Grade B8M
	Class 1 threaded mounted studs
11/2 – 8 inch (40 – 200 mm)	CS, ASTM A193, Grade B7, threaded mounting studs

3.Place the sensor between the flanges. Make sure that the centering rings are properly placed in the studs. The studs should be aligned with the markings on the rings that correspond to the flange you are using.

4.Insert the remaining studs, washers, and nuts.

5.Tighten to the torque specifications shown in Table 5-5. Do not overtighten the bolts or the liner may be damaged.

NOTE

On the 4- and 6- inch PN 10-16, insert the sensor with rings first and then insert the studs. The slots on this ring scenario are located on the inside of the ring.

Figure 5-11. Gasket Placement with Centering Rings

Centering Rings	Customer-supplied
	Gasket
Installation, Studs	FLOW
Nuts and Washers

Flange Bolts

Sensor sizes and torque values for both Class 150 and Class 300 flanges are listed in Table 5-5. Tighten flange bolts in the incremental sequence, shown in Figure 5-10.

NOTE

Do not bolt one side at a time. Tighten each side simultaneously. Example:

1.Snug left

2.Snug right

3.Tighten left

4.Tighten right

Do not snug and tighten the upstream side and then snug and tighten the downstream side. Failure to alternate between the upstream and downstream flanges when tightening bolts may result in liner damage.

Always check for leaks at the flanges after tightening the flange

bolts. All sensors require a second torquing 24 hours after initial flange bolt tightening.

See ”Safety Messages” on pages 5-1and 5-2for complete warning information.

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