Pipe Connections - ABB 10DX3111G Instruction Manual

10DX3111 INSTRUCTION MANUAL

2.4.2 Pipe Connections

Standard meter piping connections are made by means of flanges that conform to ANSI standards
in outside diameter and bolt circle. The bearing surfaces of the flanges are insulated with the me-
ter pipe liner. Outline and mounting dimensions for meters specified for continuously submerged
applications are given in Figures 2-3 and 2-4. Figures 2-5 and 2-6 provide outline and mounting di-
mensions for meters used in accidental submergence applications.
It is generally recommended that two pipe spools be installed, one on each end fitting of the Mag-
netic Flowmeter, while it is out of the pipeline in order to minimize the possibility of damage to the
meter pipe and flange liner during mounting.
A pair of the proper gaskets to suit the particular lining option of the meter supplied is included
within the installation kit which accompanies the Magnetic Flowmeter. Before connections are
made, the bearing surfaces of NEOPRENE- or polyurethane-lined meter flanges, their NEOPRENE
gaskets and adjacent pipeline flanges should be thoroughly dusted with talc gasket powder. This is
done to prevent possible damage to the meter lining or gaskets, should the meter be removed from
the line.
If the Magnetic Flowmeter is to be mounted in a non-conductive pipeline or a metal pipeline with an
insulating liner, the user must provide a pair of suitable gaskets between the customer-supplied an-
nular meter grounding rings (discussed under Grounding Procedure, Case 2, below) and the adja-
cent pipeline flange surfaces.
The standard coarse thread flange bolts supplied by the user must be well lubricated and tightened
in even increments around the flange surface. Bolt torque should be limited to that which will pro-
duce a positive seal for the application.
2-5