Meter Handling; Pipe Connections - ABB K-MAG 10D1476 Instruction Manual

10D1476 K-MAG MAGNETIC FLOWMETER INSTRUCTION MANUAL

2.3.2 Meter Handling

The ceramic body of the flowmeter must be protected at all times, as it can be damaged by sharp
objects or cracked by sharp impact blows. If required, temporary supports may be used during meter
installation. Do not pass any rope or wire sling through the meter bore. Meter weights are listed in
Table 1-2.

2.3.3 Pipe Connections

The Model 10D1476 magnetic flowmeter has a wafer type body designed for mounting between
adjacent pipe flanges. Most commonly used ANSI, BS and DIN type flanges can be accommodated.
Mounting hardware (studs, nuts, gaskets and the flange adaptor device(s) for the particular flange
type and rating specified) is included with the meter, if required. (See Model Number Breakdown in
Section 1.2.)
The K-MAG magnetic flowmeter is supplied in one of two basic body designs, depending upon meter
size. For example, 1 - 40 mm (1/25 - 1-1/2 inch) size meters have clearance holes provided in the
meter body for through-bolt mounting, while 50 - 100 mm ( 2 - 4 inch) size meter bodies mount in a
cradle formed by the mounting studs and sleeves used for that particular 4-bolt or 8-bolt flange
pattern. Typical mounting arrangements are illustrated in Figures 2-6 and 2-7. Figure 2-8 illustrates
the use of sanitary end fittings (flanged adaptor with ferrule). Line schedule 80 or lighter pipe is
recommended for system piping.
When the magnetic flowmeter is to be mounted in an electrically non-conductive pipeline such as
totally plastic pipe, or a metal pipeline with an insulating liner, the user must obtain a pair of meter
grounding rings (discussed in Section 2.4 Grounding Procedure) to facilitate grounding of the
process. Good grounding is effected by bonding to the process liquid, both upstream (inlet end) and
downstream (outlet end) of the meter, thereby preventing any stray electrical currents that may be
carried by the pipeline, or by the process, from passing through the magnetic flowmeter. Improper
grounding often results in unsatisfactory meter performance, therefore particular attention should be
paid to the meter grounding procedure.
The flange gaskets supplied with the installation kit are the proper size for the particular meter.
These gaskets fit inside the meter housing end rings, against the upstream and downstream spool
faces, as shown in Figures 2-6 and 2-7. When the meter is installed, the gaskets must be placed
within the housing end rings so that they will be between the spool face and the adjacent pipe flange.
When sanitary couplings are specified, the flanged adaptors with the ferrule for Tri-Clamp coupling
are preassembled to the meter body (see Figure 2-8). Raised face type pipe flanges are recom-
mended for meters with sanitary couplings.
The threaded mounting studs and nuts supplied in the meter installation kit should be well lubricated
before use. When the meter has been installed in the pipeline, tighten the nuts in even increments
around the flange surface as described in Figure 2-6. It is recommended that an open end wrench
with an handle no greater than 8 inches be used for tightening the nuts; i.e., torque should be limited
to that which will produce a positive seal without damage to the face of the meter spool. Refer to
Table 2-1 for recommended bolt torque.
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