Process Flange Removal; Process Flange Installation - ABB Platinum standard Series Product Instruction

Process Flange Removal

Process Flange Installation

WBPEEUI110504A0
REPAIR AND REPLACEMENT PROCEDURES
1. Remove the transmitter from the process.
2. Using the adjustable end wrench, remove the flange adapt-
ers, vent/drain plugs, and pipe plugs from the process flanges
(if supplied, refer to Figs.
3. Using the adjustable end wrench, remove four of the pro-
cess flange nuts from either side of the process flange
(Fig. 8-2).
4. Remove the process flange studs (Fig. 8-2).
5. Separate the flanges from the cell, being careful not to
damage the isolating diaphragms (Fig. 8-2).
6. Remove the process and flange adapter (if supplied)
O-rings.
1. Refer to Section 9
flange adapter (if supplied, see Fig. 8-2) O-rings for the
application.
2. Coat the O-rings with a film of Dow Corning No. 4 com-
pound and install.
3. Perform Steps 4 through 7 in the
section.
4. If supplied, install the flange adapters. Be sure to orient
them in the same position as when they were removed to
maintain the proper center-to-center distance for the applica-
tion.
5. Torque the flange adapter bolts to 45 to 49 Nm (33 to
37 ft-lbs).
NOTE: If the O-rings are PTFE, tighten to the same torque again
after five days . This is necessary due to the cold flow properties of
PTFE. Tests have shown that a loss of torque of as much as
40 percent occurs over the five days. After a second tightening, no
loss of torque is apparent.
6. If supplied, wrap the threads of the vent/drain plugs and
pipe plugs with one layer of Tape-Seal using a small overlap.
7. Press the tape into the threads slightly to hold it in place.
8. Install the vent/drain plugs and pipe plugs and tighten
them with the adjustable end wrench.
COMPONENT REMOVAL AND INSTALLATION PROCEDURES
8-2 and 8-3).
and determine the proper process and
Bolting Installation
8 - 9