Rosemount 1199, Справочное руководство

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Reference Manual
00809-0100-4002, Rev BB
November 2012
Rosemount 1199
3-14
Tank Preparation
When preparing the tank, ensure an area with a minimum diameter of 9 ¼-in.
(235 mm) is available to properly weld the tank spud, Figure 3-22 bullet 1. The
center of the tank spud should be at least 1 ½-in. (38 mm) below the minimum
measurement level, as shown in bullet 2 of Figure 3-22. In order to get a
proper process fluid measurement, half of the remote seal diaphragm must be
covered.
Figure 3-22. Tank Preparation
Bullet 3 shows the actual hole cut in the tank. Attempt to cut the hole as
smoothly and as circular as possible. A torch cut is not recommended. The
tank spud OD is 5.98-in. ±.010-in. (152 mm ± 0.25 mm). When cutting the
hole for the tank spud, the gap between the hole diameter and spud OD
should be held to a minimum. It is recommended that the hole be no larger
than 6.020-in. (153 mm). Anything larger than 6.020-in. (153 mm) could
increase the amount of tank spud distortion.
If a bevel(s) is required, an angle no larger than 37.5º is recommended; see
ASME B16.25 for more details. Bevels can be made on one or both sides of
the tank. Do not grind or cut the bevel to a sharp point. Attempt to leave a flat
area, as shown in Figure 3-23 below.
Figure 3-23. Bevel Example