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6.7.4
Process sealing
According to „North American Requirements for Process
Sealing between Electrical Systems and Flammable or
Combustible Process Fluids"
IMPORTANT (NOTE)
Equipment for use in Canada, Class II,
Groups E, F and G shall be limited to a maximum
surface temperature of 165°C (329 °F).
Seal all conduits within 18 inches (457.20 mm).
The flow meters from ABB are designed for the world wide
industrial market and are suitable to measure among others
flammable and combustible process fluids and are installed
within a process pipe.
Among others the instruments are connected to an electrical
system via a conduit system which is able to allow the
migration of process fluids directly into the electrical system.
Change from two to one c olumn
6.7.5
Changing the type of protection
The FCB330/350, FCH330/350 and FCT330/350 models can be operated in different types of protection:
— When connected to an intrinsically safe circuit in Div. 1, operated as an intrinsically safe device (IS)
— When connected to a non-intrinsically safe circuit in Div. 1, operated as a device with a explosionproof enclosure (XP)
— When connected to a non-intrinsically safe circuit in Div. 2, operated as a non-incendive device (NI)
If a device which is already installed is required to provide a different type of protection, the following measures must be
implemented/inspections must be performed in accordance with applicable standards.
1. Type of protection
Housing: XP, U
= 60 V
max
Outputs non IS
Outputs: IS
Housing: XP
Housing: XP, U
= 60 V
max
Outputs: NI
Change from one to tw o c olumns
34 CI/FCB300/FCH300-EN Rev. F | CoriolisMaster FCB330, FCB350, FCH330, FCH350
2. Type of protection
Required step/check
Housing: XP
— 500 V AC/1 min or 500 x 1,414 = 710 V DC/1 min
Outputs: IS
— Visual inspection, particularly of the electronic circuit boards
— Visual inspection: No damage or explosion can be detected.
Housings: Div 2
— 500 V AC/1 min or 500 x 1,414 = 710 V DC/1 min
Outputs: NI
— Visual inspection, particularly of the electronic circuit boards
— Visual inspection: No damage or explosion can be detected.
Housing: XP
Visual inspection: No damage to the threads (cover, 1/2" NPT cable glands)
Outputs: non IS
Housing: XP
No special measures
Outputs: NI
Housing: XP
— 500 V AC/1 min or 500 x 1,414 = 710 V DC/1 min
Outputs: IS
— Visual inspection, particularly of the electronic circuit boards
— Visual inspection: No damage or explosion can be detected.
Housing: XP
Visual inspection: No damage to the threads (cover, 1/2" NPT cable glands)
Outputs: non IS
To avoid the migration of process fluids the instruments has a
process seal which meet the requirements of
ANSI/ISA 12.27.01.
The Coriolis Flowmeters are designed as a "single seal
device".
In accordance to the requirements of ANSI/ISA 12.27.01 the
existing operating rates of temperature, pressure and liner
types have to reduce to the following limits:
Limits
Flange or tube Material
Sizes
Usable Operating Temperature
Pressure result
test between terminals 31 / 32, 33 / 34, 41 / 42, 51 / 52, 81 / 82 and / or 97 / 98 and
terminals 31, 32, 33, 34, 41, 42, 51, 52, 81, 82, 97, 98 and the housing. When this
test is performed, no voltage flashover is permitted in or on the device.
test between terminals 31 / 32, 33 / 34, 41 / 42, 51 / 52, 81 / 82 and / or 97 / 98 and
terminals 31, 32, 33, 34, 41, 42, 51, 52, 81, 82, 97, 98 and the housing. When this
test is performed, no voltage flashover is permitted in or on the device.
test between terminals 31 / 32, 33 / 34, 41 / 42, 51 / 52, 81 / 82 and / or 97 / 98 and
terminals 31, 32, 33, 34, 41, 42, 51, 52, 81, 82, 97, 98 and the housing.When this test
is performed, no voltage flashover is permitted in or on the device.
All materials of the existing model
number
DN 20 ... 150 (1/2" ... 6")
-50 °C ... 200 °C (-58 °F ... 392 °F)
PN100 / Class 600
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