instruction mi 021-380 - eck-boro gmbheck-boro.ch/dokumentation_e.ib/mi/mi_021-380.pdf ·...

Instruction MI 021-380December 2015

8000A Series Compact Magnetic Flowtubes

Wafer Ceramic-Lined, 1/16- through 6-inch SizesWafer pfa-Lined, 1/2- through 6-inch Sizes

Sanitary, Ceramic-Lined, 1/2- through 3-inch Sizes

Installation

Contents

Figures ........................................................................................................................................... 5

Tables ............................................................................................................................................ 7

1. Introduction .............................................................................................................................. 9

General Description ....................................................................................................................9

Reference Documents ...............................................................................................................10

Standard Specifications..............................................................................................................10Minimum and Maximum Upper Range Values (URV) and Nominal Calibration Factors ....10Ambient Temperature Limits (Normal Operating Conditions).............................................11Maximum Signal Cable Length ............................................................................................11Power Consumption.............................................................................................................11Process Pressure and Temperature Limits..............................................................................11Materials ..............................................................................................................................11Enclosure..............................................................................................................................12End Connections..................................................................................................................12Approximate Mass................................................................................................................13Ceramic Lining Application Guide.......................................................................................13pfa Lining Application Guide ...............................................................................................14PED Compliance .................................................................................................................15

Electrical Safety Specifications ...................................................................................................15

Flowtube Identification .............................................................................................................16

2. Installation .............................................................................................................................. 17

Unpacking and Handling Procedure .........................................................................................17

Installation Guidelines ..............................................................................................................17

Selecting a Location for the Flowtube........................................................................................18

Mounting Position ....................................................................................................................18

Pipeline Preparation ..................................................................................................................20Wafer Body Flowtubes..........................................................................................................20Sanitary Flowtubes ...............................................................................................................22

Flowtube Grounding.................................................................................................................22Wafer Body Flowtubes..........................................................................................................22Sanitary Flowtubes ...............................................................................................................24

Installation Procedure................................................................................................................24 Wafer Body Flowtubes.........................................................................................................24

3

MI 021-380 – December 2015 Contents

Sanitary Flowtubes ....................................................................................................................28

Transmitter Installation and System Wiring ..............................................................................30

Maintenance .............................................................................................................................30

4

Figures

1 Sample Flowtube Data Plates with Remotely Mounted Transmitter ....................................162 Sample Data Plate for Flowtube with Integrally Mounted Transmitter ................................163 Wafer Body Flowtube Mounted Vertically...........................................................................194 Wafer Body Flowtube Mounted Horizontally .....................................................................195 Pipeline Alignment and Support .........................................................................................216 Use of Grounding Rings when the Transmitter is in a Remote Location..............................237 Use of Grounding Rings when Transmitter is Mounted to the Flowtube .............................238 Flowtube-to-Flange Grounding...........................................................................................259 Mounting of 15 or 25 mm (1/16 to 1-1/2 in) Wafer Body Flowtubes .................................26

10 Mounting of 40 to 150 mm (2 to 6 in) Wafer Body Flowtubes ...........................................2611 Aligning Wafer Body Flowtube ..........................................................................................2712 Inserting Ceramic Sanitary Flowtube in Pipeline ................................................................2913 Tightening the Tri-Clamp Connector .................................................................................2914 Connecting Ceramic Sanitary Flowtube to Piping...............................................................30

5

MI 021-380 – December 2015 Figures

6

Tables

1 Reference Documents .........................................................................................................102 Minimum and Maximum Upper Range Values and Nominal Calibration Factors...............103 Cable Requirements ............................................................................................................114 Sanitary Flowtube Sizes .......................................................................................................125 Approximate Mass...............................................................................................................136 Process Pressure and Temperature Limits - Wafer Body Flowtubes with Ceramic Lining .....147 Pressure and Temperature Limits — Sanitary End Flowtubes ..............................................148 Process Pressure and Temperature Limits - Wafer Body Flowtubes with pfa Lining .............159 Electrical Safety Specifications .............................................................................................15

10 Pipeline Alignment Specifications .......................................................................................2211 Inside Diameters of Grounding Rings .................................................................................2412 Replacement Gasket Sizes for Ceramic Tubes ......................................................................2513 Maximum Mounting-Nut Torques for Wafer-Body Flowtubes............................................28

7

MI 021-380 – December 2015 Tables

8

1. Introduction

General DescriptionThe 8000A Series Compact Magnetic Flowtubes, in conjunction with an IMT25 Magnetic Flow Transmitter, form a magnetic flowmeter system. The flowtube can be used with most common fluids, from everyday conductive liquids to very difficult-to-handle conductive liquids. It can also be used in sanitary liquid applications when equipped with quick-disconnect Tri-Clamp type sanitary end connections that provide ease of flowtube installation and removal from the line.

The flowtubes are available in various versions. The wafer ceramic-lined flowtubes are available in 1.6 to 150 mm (1/16 to 6 in) sizes; the wafer pfa-lined flowtubes are available in 15 to 150 mm (1/2 to 6 in) sizes; and the sanitary ceramic-lined flowtubes are available in 15 to 80 mm (1/2 to 3 in) sizes. The wafer body flowtube can be used with an integrally mounted transmitter. The sanitary flowtube can only be used with a remote mounted transmitter. In remote transmitter applications, the allowable cable length, up to a maximum length of 300 m (1000 ft), is a function of the cable type, process fluid conductivity, and whether the cables are in the same or separate conduits.

The transmitter uses a pulsed-dc technique to energize the flux-producing coils of the flowtube. As the process liquid passes through the magnetic field in the flowtube, low-level voltage pulses are developed across a pair of electrodes. The voltage level of these pulses is directly proportional to the average velocity of the liquid. The transmitters convert the voltage pulse to both a standard 4 to 20 mA and pulse output signal. The 4 to 20 mA signal is used with a suitable receiver to indicate, record, and/or control a variable. The proportional pulse output can be used for totalization, and can be configured for either a high-rate or low-rate pulse. A digital output signal (either FoxCom, HART, or FOUNDATION Fieldbus communication protocol) is also provided for flowmeters serving as a primary device in an I/A Series system. Both the digital and 4 to 20 mA output signals are simultaneously available at a common pair of output terminals. Details of the output signals are given in the transmitter instruction.

This instruction (MI 021-380) relates to the installation of the flowtube portion of a magnetic flowmeter system. For installation, wiring, operation, configuration, and maintenance details relating to the flowmeter system, refer to the applicable transmitter documents.

9

MI 021-380 – December 2015 1. Introduction

Reference Documents

Standard Specifications

Minimum and Maximum Upper Range Values (URV) and Nominal Calibration FactorsIn Table 2, the minimum upper range value is not the flow rate that the flowtube can measure; it is the lowest flow rate that can correspond to the 4 to 20 mA signal. For example, for the 800HA, the minimum range is 0 to 1.0 U.S. gpm. This will generate 4 to 20 mA.

Table 1. Reference Documents

Document No. Document Description

DP 021-358 Dimensional Print - Wafer-Body Flowtubes, 1/16 to 6 in

DP 021-359 Dimensional Print - Sanitary Flowtubes, 1/2 to 3 in

DP 021-363 pfa-Lined Flowtubes, 1/2 through 6 in

MI 021-387 I/A Series IMT25 Transmitters, Installation

MI 021-391 I/A Series IMT25 Transmitters, System Maintenance

TI 27-71f Magnetic Flowtube Materials Selection Guide

TI 027-072 Magnetic Flowmeter Liquid Conductivity Tables

PL 008-740 Parts List - Wafer Body Flowtubes, 1/16 to 6 in

PL 008-741 Parts List - Sanitary Flowtubes, 1/2 to 3 in

Table 2. Minimum and Maximum Upper Range Values and Nominal Calibration Factors

Nominal Flowtube Size Flowtube Model Codes

Minimum and Maximum Upper Range Values (Flow Rate)

Nominal Calibration

Factor

mm in. Sanitary Body Wafer Body L/min U.S. gpm Unitless

1.6 1/16 Not Available 801SA-WCR 0.11 and 1.1 0.03 and 0.3 57403 1/8 Not Available 801EA-WCR 0.26 and 4.9 0.07 and 1.3 22246 1/4 Not Available 801QA-WCR 0.68 and 13.6 0.18 and 3.6 87715 1/2 800HA-SCR 800HA-

WCR/WCI/ WPR/WPI3.8 and 76 1.0 and 20 220

25 1 8001A-SCR 8001A-WCR/WCI/ WPR/WPI

13.2 and 265 3.5 and 70 60

40 1-1/2 801HA-SCR 801HA- WCR/WCI/WPR/WPI

34.1 and 644 9 and 170 17


49 and 946 13 and 250 12


117 and 2366 31 and 625 5.8

100 4 Not Available 8004A-WCR/WCI/ WPR/WPI

208 and 4164 55 and 1100 3.0

150 6 Not Available 8006A-WCR/WCI/ WPR/WPI

462 and 9236 122 and 2440 1.1

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1. Introduction MI 021-380 – December 2015

Ambient Temperature Limits (Normal Operating Conditions)Wafer Body Flowtube

With Remote Mounted Transmitter: –40 and +70°C (–40 and +158°F)

With Integrally Mounted Transmitter: –20 and +55°C (–4 and +131°F)

Sanitary Flowtube: –20 and +70°C (–4 and +158°F)

Maximum Signal Cable LengthThe maximum allowable cable length is a function of the cable type, process fluid conductivity, and whether the cables are in the same or separate conduits. Standard system accuracy is maintained when the installations are in accordance with Table 3.

Power ConsumptionLess than 24 W when used with an IMT25 transmitter at reference voltage and frequency.

Process Pressure and Temperature LimitsSee Tables 6 and 8 for wafer body flowtubes, and Table 7 for sanitary flowtubes.

MaterialsFlowtube Housing Ductile Iron with epoxy coated finish.

Junction Box Cast Aluminum.

Junction Box /Cover Gasket Silicone Sponge Rubber.

Junction Box/Housing Gasket Cork/Silicone Rubber

Flowtube Ceramic, 99.5% Aluminum oxide. The ceramic usedon sanitary flowtubes is polished to a 25 Ramicrometer finish.

Low permeability invest cast ss with pfa-RetainedLiner.

Table 3. Cable Requirements

Max. Cable Length (a)

a. Maximum cable length is the maximum distance between the transmitter and the flowtube.

Min. Fluid Conductivity (b)

b. Refer to TI 27-072 for conductivities of various process liquids.

Signal and Coil Drive Cables

300 m(1000 ft)

5 μS/cm Signal and Coil Drive Cables in separate conduit. Signal Cable to be Foxboro Part No. R0101ZS (feet) or B4017TE (meters).

225 m(750 ft)

5 μS/cm Signal and Coil drive cables in same conduit. Signal Cable to be Foxboro Part No. R0101ZS (feet) or B4017TE (meters).

150 m(500 ft)

20 μS/cm Signal cable may be in same conduit as coil drive cable. Signal cable to be good quality twisted shielded pair, preferable no smaller than 1.0 mm2 (or 18 AWG) for mechanical considerations (Belden 8760 or 9318, Alpha 5610/1801 or 5611/1801, or equivalent).

11


Electrodes (Ceramic Tube) Platinum (all sizes) or Tantalum 1.6 to 6 mm(1/16 to 1/4 in).

Electrodes (pfa-Lined Tube) Platinum-Iridium, Titanium, Tantalum-Tungsten, 316 ss, Conical 316 ss, Hastelloy C,and Conical Hastelloy C.

Gaskets (Ceramic Tube)

Wafer Body Flowtubes Gylon (ptfe/barium sulfate)

Sanitary Flowtubes White Buna-N is standard (not recommended with steam)Viton is optional.

Gaskets pfa-Lined Tube) No special gasket required; Customer tosupply.

EnclosureThe enclosure is finished with a high-build epoxy paint. It is designed to meet the requirements of IEC IP66, and to provide the watertight and corrosion-resistant protection of NEMA Type 4X.

End Connections

Wafer Body FlowtubeMounts between metric PN 10, 16, 25 or 40 R.F. flanges; or ANSI Class 150, 300 R.F. flanges. Flange bolting kits are available.

NOTEFlowtube sizes 1.6 to 6 mm (1/16 to 1/4 in) are designed for mounting between 15 mm (1/2 in) flanges.

Sanitary FlowtubeTri-Clamp, stainless steel, quick-disconnect end connections.

Table 4. Sanitary Flowtube Sizes

Flowtube Size

Flowtube Model Code

Tri-Clamp End Connection Size

mm in mm in

15 1/2 800HA-SCR 25 1

25 1 8001A-SCR 25 1

40 1-1/2 801HA-SCR 40 1-1/2

50 2 8002A-SCR 50 2

80 3 8003A-SCR 80 3

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Approximate Mass

Ceramic Lining Application GuideCeramic provides excellent corrosion and abrasion resistance and is suitable for high pressure, high temperature, or vacuum service applications. Caution should be used on applications involving large temperature swings during startup, normal operation, or clean-in-place. Refer to Table 6 and Table 7 for process pressure and temperature limits.

Table 5. Approximate Mass

Flowtube SizeWafer Body Flowtubes

Model Code (a)

a. On the “-WCI/WPI” codes (flowtube-mounted transmitter), mass represents the mass of the flowtube only. For total mass (flowtube and transmitter), add 5 kg (11 lb) to the value listed to account for the transmitter.

Flowtube MassSanitary Flowtubes

Model Code

Flowtube Mass

mm in kg lb kg lb

1.6 1/16 801SA-WCR 2.3 5 Not Applicable - -

3 1/8 801EA-WCR 2.3 5 Not Applicable - -

6 1/4 801QA-WCR 2.3 5 Not Applicable - -

15 1/2 800HA-WCR/WCI 2.3 5 800HA-SCR 2.6 5.7

25 1 8001A-WCR/WCI 3.0 6.6 8001A-SCR 3.4 7.6

40 1-1/2 801HA-WCR/WCI 3,5 7.7 801HA-SCR 4.0 8.9

50 2 8002A-WCR/WCI 4.5 9.9 8002A-SCR 5.2 11.4

80 3 8003A-WCR/WCI 7.0 15.4 8003A-SCR 7.8 17.1

100 4 8004A-WCR/WCI 10.0 22 Not Applicable - -

150 6 8006A-WCR/WCI 17.7 39 Not Applicable - -

15 1/2 800HA-WPR/WPI 1.7 3.7

25 1 8001A-WPR/WPI 2.4 5.4

40 1-1/2 801HA-WPR/WPI 2.9 6.5

50 2 8002A-WPR/WPI 3.5 7.7

80 3 8003A-WPR/WPI 7.8 16.1

100 4 8004A-WPR/WPI 11.8 26.4

150 6 8001HA-WPR/WPI 22.7 50.0

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pfa Lining Application GuideThe pfa lining provides excellent corrosion, mild abrasion, chemical, stress crack, thermal shock and hydrolysis resistance. Also, suitable for applications requiring high/low temperatures, anti-stick and high purity properties. Refer to Table 8 for process pressure and temperature limits.

NOTEThe pfa liner may be non-uniform in appearance, having dark and light shading. This condition is inherent in the natural pfa molding process and does not in any way affect the durability or performance of the tube. There is no coloring or fillers that could leach into the process.

Table 6. Process Pressure and Temperature Limits - Wafer Body Flowtubes with Ceramic Lining

Flowtube Model Code

Operating Condition Limits (a)

a. The maximum allowable step change of the process fluid temperature is an increase of 125°C (225°F) and a decrease in temperature of 75 °C (135 °F).

Remotely Mounted Transmitter Integrally Mounted Transmitter (b)

b. For process temperatures >121°C (>250°F), the transmitter must be remotely mounted. That is, “-WCI” cannot be used.

801SA-WC through

8002A-WC

Full Vacuum and:5.1 MPa at 38°C (740 psi at 100°F)and4.4 MPa at 204°C (635 psi at 400°F)


8003A-WC through

8006A-WC



Table 7. Pressure and Temperature Limits — Sanitary End Flowtubes

Flowtube Model Code Process Pressure and Temperature Limits (a)

a. The maximum allowable step change of the process fluid temperature is an increase of 125°C (225°F) and a decrease in temperature of 75 °C (135 °F).

Gasket Material

800HA-SCR through8002A-SCR

Full Vacuum to 3.1 MPa from -40 to +38°C(Full Vacuum to 450 psi from -40 to +100°F)

Buna-N or Viton

Decreasing to 2.07 MPa at 99°C(Decreasing to 300 psi at 210°F)

Buna-N


Viton

8003A-SCR Full Vacuum to 2.4 MPa from -40 to +38°C(Full Vacuum to 350 psi from -40 to +100°F)

Buna-N or Viton

Decreasing to 1.7 MPa at 99°CDecreasing to 250 psi at 210°F

Buna-N


Viton

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PED ComplianceThe 8000A Series Magnetic Flowtubes are fully compliant with the European Pressure Equipment Directive as process piping devices for Fluid Group 2 liquids only. the resulting product category classifications are either SEP or Category I, depending on line size and pressure rating, and as such, the product data labels carry the CE mark only (with no notifying body number).

Electrical Safety SpecificationsNOTE

These flowtubes have been designed to meet the electrical safety descriptions listed in Table 9. For detailed information, or status of testing laboratory approvals/certifications, contact Global Customer Support.

Table 8. Process Pressure and Temperature Limits - Wafer Body Flowtubes with pfa Lining

Flowtube Model Code

Operating Condition Limits (a)

a. The maximum allowable step change of the process fluid temperature is an increase of 125°C (225°F) and a decrease in temperature of 75 °C (135 °F)

Remotely Mounted Transmitter Integrally Mounted Transmitter (b)

b. For process temperatures >120°C (>250°F), the transmitter must be remotely mounted. That is, “-WCI” cannot be used.

800HA-WP through 8006A-WP



Table 9. Electrical Safety Specifications

Testing Laboratory,Types of Protection, and Area Classification Application Conditions

Electrical Safety Design Code

CSA for use in Class I, Division 2, Groups A, B, C, and D; Class II, Division 2, Groups F and G; Class III, Division 2 hazardous locations.

Temperature Class T6. Ta =70°C. CNZ

FM nonincendive Class I, Division 2, Groups A, B, C, and D; suitable for Class II and III, Division 2, Groups F and G hazardous locations.

Temperature Class T6. Ta =70°C.For use on nonhazardous processes only.

FNA

CENELEC EEx e ia IIC, Zone 1. KEMA Ex-96.D.0645XTemperature Class T3-T6.Electrodes are intrinsically safe when connected to certified intrinsically safe equipment.

ESB

CENELEC, nonincendive, Ex N IIC,Zone 2.

KEMA Ex-96.Y.0644XTemperature Class T2-T6.

KNZ

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Flowtube IdentificationThe flowtube can be identified by data plates located on the flowtube. Typical data plates are shown in Figures 1 and 2. Refer to MI 021-387 for information regarding transmitter data plates.

Figure 1. Sample Flowtube Data Plates with Remotely Mounted Transmitter

Figure 2. Sample Data Plate for Flowtube with Integrally Mounted Transmitter

MWPMWP

CAL FACTORIMT25 CAL FACTORCUST. DATA

PSI @MPa @PSI @MPa @

°F °C °F °C

8000A SERIESMAGNETIC FLOWTUBE

MODEL

REF. NO.ORIGINELECTRODES

THE FOXBORO COMPANY, FOXBORO, MA. 02035

ST.

INSTALL PER MI 021 - 380

PATENT PENDING

APPROVED

FM

NEMA 4, SUITABLE FOR CLASS I,II & III, GR. A, B, C, D, F & G, DIV. 2HAZARDOUS LOCATIONTEMPERATURE RANGE T6

MAXIMUM AMBIENT TEMPERATURE 70oC.

FOR USE ON NON-HAZARDOUS PROCESS ONLY.

WARNING: EXPLOSION HAZARD. DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF

OR THE AREA IS KNOWN TO BE NON-HAZARDOUS.

8000A SERIES MAGNETIC FLOWTUBE

CUST. DATA

MWPMWP

o

@

@MPa @

MPa @

PSI

PSI

o FC

C

o

oF

MODELREF. NO.ORIGINIMT 25 CAL. FACT.ELECTRODES

ST.

WARNING: EXPLOSION HAZARD. DO NOT DISCONNECT EQUIPMENTUNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA ISKNOWN TO BE NON - HAZARDOUS.AVERTISSEMENT: RISQUE D'EXPLOSION AVANT DE DEBRANCHIERL'EQUIPEMENT, COUPEZ LE COURANT OU ASSUREZVOUS QUEL'EMPLACEMENT EST DESIGNE NON DANGEREUX. ENCLOSURE 4X

APPROVEDFM

R

R

PATENT PENDING

FM ONLY: INTRINSICALLY SAFE CL. I, DIV. 1, GR. A, B, C & D ELECTRODES WHENCONNECTED TO TRANSMITTER PER TI 005 - 101. MAX. AMB. TEMPERATURE 70o C.SUITABLE FOR CL. I, DIV. 2, GR. A, B, C & D; CL. II, DIV. 2, GR. F & G, CL. III, DIV. 2 HAZARDOUS LOCATION TEMPERATURE RANGE T6.

CAUTION: USE SUPPLY WIRES SUITABLE FOR AT LEAST 125o C.ATTENTION: EMPLOYER DES FILS D'ALIMENTATIONPOUR AU MOINS 125o C.

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2. Installation

Unpacking and Handling ProcedureAfter removing flowmeter from its shipping carton, inspect it for visible damage. If any damage is observed, notify the carrier immediately and request an inspection report. Obtain a signed copy of the report from the carrier.

! CAUTIONAvoid touching the electrodes with fingers or any material that can contaminate the electrodes. A deposit on the electrodes will result in a high-impedance boundary between the electrodes and conductive fluid. If the electrodes have been touched, clean them with isopropyl alcohol.

Installation GuidelinesWhen properly installed, ceramic or pfa-lined magflow tubes are capable of providing high accuracy and durability while operating under real life conditions. To get the maximum performance from the tube, select an appropriate location in the pipeline and avoid the factors that create bending loads at the flowtube. These factors are highlighted below in general terms and covered specifically in the detailed installation instructions.

It is very important that:

♦ A location is selected that assures a full flowtube under all operating conditions.

♦ The pipeline and flanges are aligned per the detail instructions.

♦ The gaskets are centered on the ends of the flowtube.

♦ The flange bolts are tightened carefully to produce a uniform well-centered load on the flowtube.

♦ The torque limits are not exceeded. (By following the installation instruction details, good reliable joints can be made without exceeding these limits.)

♦ You allow approximately 5 pipe diameters of straight pipe upstream of the flowtube and 3 pipe diameters downstream. Pipe diameters are measured from the centerline of the flowtube. See Figure 3.

♦ If mating pipe is lined metal or plastic, grounding rings must be installed on each end of the flowtube to negate electrical disturbances and to insure flowtube performance. This requirement does not apply to sanitary flowtubes.

17

MI 021-380 – December 2015 2. Installation

Selecting a Location for the FlowtubeThe flowtube can be installed in plastic or metal (magnetic or non-magnetic) piping. Usually the flowtube tube can be placed at any convenient location in the pipeline, but to insure good performance, the location should be reviewed relative to the factors listed below:

♦ It is essential for accuracy that the tube is completely full during operation. Horizontal, vertical or sloping positions are acceptable, but some positions require special attention to detail to be sure that the tube remains full. In addition to obvious problem locations such as down flowing vertical runs, consider areas where air pockets may form and where siphoning action or low pressure areas could create voids.

♦ The effects of upstream disturbances, such as valves and elbows, are difficult to predict, but in nearly all cases if there are at least 5 pipe diameters of straight pipe upstream of the flowtube, the standard accuracy will be realized. Downstream disturbances that are 3 or more pipe diameters from the center of the tube do not affect the measurement accuracy. The inside diameter of the piping should be the same as or larger than the nominal size of the flowtube. Flowtubes can be placed in larger nominal size pipelines using tapered conical reducers. The small end of the reducers can be directly coupled to the flowtube and have a maximum included angle of 16°.

♦ If the flowtube is to be used to measure a slurry flow, it is important for accuracy to select a location where the velocities of the slurry components will be nearly equal and high enough to insure good mixing.

To assure good service life:

♦ Avoid locations that have a rapid change of process fluid temperature (see the rapid temperature change limit in the “Ceramic Lining Application Guide” on page 13.

♦ Avoid areas that may have large stresses such as water hammer or severe shaking of the pipeline.

♦ Provide protection from freezing.

♦ With slurries, do not position the electrodes in such a way that a bend or other pipeline feature would cause large solid particles to strike the electrodes.

♦ The tube enclosure is rated for NEMA 4X or IEC IP66 protection and has wide ambient temperature limits, but the tube should be protected from chemical spills and direct exposure to high temperature radiant heat sources.

Select a site with good accessibility for installation.

Mounting PositionAfter a location is selected in the pipeline for the flowtube, the mounting position of the tube at that location still has to be determined. The choices are: (1) position of the conduit connections, (2) electrode position, and (3) convenience. Performance of the flowtube is not affected by the direction of the flow through the tube. This permits the flowtube to be installed in the direction that provides the best location for the wiring connections. If the actual flow direction does not agree with the “direction-of-flow” arrow on the tube, just reverse the polarity of the coil drive wire connections.

18

2. Installation MI 021-380 – December 2015

The flowtube can be mounted at any position without degrading performance. The only requirement is that the flowtube be completely full with the process liquid during measurement, and that the electrodes be in the horizontal plane.

If the flowtube is not mounted in a vertical position, it is recommended that it be turned so that the electrodes are not near the top and bottom of the pipe. This is to avoid the possibility of losing electrode-to-fluid contact, either because of bubbles (at top), or sediment (at bottom) of the flowtube.

Figure 3. Wafer Body Flowtube Mounted Vertically

Figure 4. Wafer Body Flowtube Mounted Horizontally

NOTE: TUBE MAY BE INSTALLED IN REVERSEDIRECTION IF DESIRABLE FOR ELECTRICALPOSITIONING OF ELECTRICAL CONNECTION.SEE “MOUNTING POSITIONS”.

3 PIPE DIAMETERSRECOMMENDEDMINIMUM FOR

5 PIPE DIAMETERSRECOMMENDEDMINIMUM FOR UPSTREAM

FLOWTUBE

DISTURBANCES

DOWNSTREAMDISTURBANCES

DOWNSTREAM

UPSTREAM

FLOW

FLOWTUBEMOUNTEDTRANSMITTERSHOWN

FLOW AXISELECTRODE AXIS

FLOWTUBE MOUNTED TRANSMITTERWITH OPTIONAL JUNCTION BOX SHOWN

19


If the flowtube has an integrally mounted transmitter, it may be desirable to adjust the mounting position of the transmitter. To turn the transmitter, remove the four transmitter screws and washers. Turn the transmitter ±90° to the desired orientation and mount it back on the flowtube. If this does not give a satisfactory mounting position, you can reinstall the flowtube rotated 180° (flowtube direction reversed). This permits mounting the transmitter in the desired position. If installed in this manner, with flow direction reversed, you must either change the coil connections to the transmitter or modify the transmitter configuration.

! CAUTIONWhen turning transmitter, do not separate it from flowtube. Separating the transmitter from the flowtube may cause interconnecting wires to be damaged.

Transmitter covers can also be turned in 90° increments so that the display and data plate can be easily read. Unscrew the four captive screws and turn cover to desired position. Refer to MI 021-387 for detailed IMT25 Transmitter instructions.

! CAUTIONDo not separate cover from transmitter any more than required to turn it. Excessive separation can cause any of the interconnecting electrical wires to be damaged.

Pipeline Preparation

Wafer Body Flowtubes

Flowtube DimensionsRefer to the dimensional prints listed in “Reference Documents” on page 10.

Flange Types and MaterialsThe pipe and flange material can be magnetic, non-magnetic metal, or plastic without affecting the accuracy of the flowtube. To help control the stresses on the ceramic or pfa, it is best to use a flange type that has a raised face I.D. equal to the pipeline I.D. such as a welding neck or socket welding flange. This assures full gasket contact for more even loading of the ceramic or pfa ends of the flowtube and permits higher bolting torques without over-compressing the gasket. Flange types that do not provide full surface contact with the gasket can be used, but with reduced bolt torques and careful attention to alignment.

Pipeline Support and AlignmentAdequately support the pipeline to carry its weight when full and to control pipeline motions such as may be caused by water hammer or other disturbances within the piping system.

20


NOTEThe 1.6 mm (1/16 in), 3 mm (1/8in), and 6 mm (1/4 in) flowtubes are designed to be mounted between 15 mm or 1/2 inch flanges. The piping leading up to the flanges can be 1/2 inch or smaller. If smaller than 1/2 inch piping is used, it may not be strong enough to support the flowtube. If the piping is not strong enough, a support structure should be attached to the flanges.

In cases where temperature differences may occur, make provisions to accommodate for thermal expansions in a way that preserve the initial alignment of the piping at the flowtube. Align the pipe and flanges as shown in Figure 5.

Figure 5. Pipeline Alignment and Support

The “L” dimension is to be measured at four equally spaced positions on the raised faces. All four must simultaneously be within the limits listed in Table 10. Four equally spaced flowtube installation studs can be used as shown to help achieve the flange alignment. The nuts can be used to lightly push the flanges apart or pull them together as needed. The limits on how much force the nuts can provide is given by the torque specs in the table. The final pipeline supports should be in place and maintaining the center line alignment of the up and down stream piping when the “L” dimension is being checked.

NOTEFor pfa-Lined tubes, the “L” dimension assumes 1/8 inch thick gaskets are used against pfa flange faces.

0.060-IN MAXIMUM MISALIGNMENT

PIPELINE SUPPORTS IN PLACE PUSH POSITION PULL POSITION

“L”

“L”

21


Sanitary Flowtubes

Flowtube DimensionsRefer to the dimensional prints listed in “Reference Documents” on page 10.

Pipeline Support and AlignmentAdequately support the pipeline to carry its weight when full and to control pipeline motions such as may be caused by water hammer or other disturbances within the piping system.

In cases where temperature differences occur, make provisions to accommodate for thermal expansions in a way that preserve the initial alignment of the piping at the flowtube.

The pipeline should provide the support for the flowtube and the alignment of the pipeline must be accurate enough to allow sealing of the Tri-Clamp type coupling and connections with normal clamp tightening forces.

Flowtube Grounding

Wafer Body FlowtubesFor proper system performance it is necessary to establish a fluid reference signal. The fluid (grounding) wires attached to the junction box or the transmitter mounting plate, shown in Figures 6 and 7, are used for this purpose. The other end of these wires must be connected where they will provide electrical continuity to the process fluid. Additional grounding details are given in MI 021-387.

When the flowtube is mounted between unlined metal pipe, continuity is provided by connecting the grounding wires from the flowtube to the pipe flanges as described in Figure 8.

Table 10. Pipeline Alignment Specifications

Flowtube Size “L” DimensionAlignment Check

Maximum Torque (a)

a. See Table 13 for final torque values.

mm in mm in N•m Lb•ft

1.6 to 15 1/16 to 1/2 77.7 to 78.5 3.06 to 3.09 2.7 2

25 1.0 77.7 to 78.5 3.06 to 3.09 4 3

40 1-1/2 88.9 to 89.7 3.50 to 3.53 7 5

50 2.0 113.0 to 113.8 4.45 to 4.48 20 15

80 3.0 155.7 to 156.5 6.13 to 6.16 20 15

100 4.0 190.5 to 191.3 7.50 to 7.53 20 15

150 6.0 209.5 to 210.3 8.25 to 8.28 27 20

22


When the flowtube is mounted between nonmetal or lined metal pipe, installation of grounding rings on each pipe flange is required as shown in Figures 6 and 7. Continuity is provided by connecting the grounding wires from the flowtube to the grounding rings.

Figure 6. Use of Grounding Rings when the Transmitter is in a Remote Location

Figure 7. Use of Grounding Rings when Transmitter is Mounted to the Flowtube

FLOWTUBE

GASKET (SUPPLIED BY FOXBORO FOR CERAMIC

PIPE FLANGEFLUID (GROUNDING) RINGS

GASKET (SUPPLIED BY USER)GASKET (SUPPLIED BY USER)

GASKET (SUPPLIED BY FOXBORO

FLUID (GROUNDING) WIRES JUNCTION BOX

FOR CERAMIC TUBE ONLY) TUBE ONLY)

PIPE FLANGE

GASKET (SUPPLIED BY USER)

FLUID (GROUNDING) RINGS

GASKET (SUPPLIED BY USER)

GROUNDING WIRES

FLUID (GROUNDING) WIRES

FLOWTUBE-MOUNTED TRANSMITTER(SHOWN WITH OPTIONAL JUNCTION BOX)

23


Sanitary FlowtubesThe sanitary flowtubes do not require pipeline ground wires to establish the process fluid reference signal. The sanitary end connections of these tubes provide the contact. For electrical safety it is necessary to make a power ground connection as shown in the flowtube to transmitter wiring section of the transmitter instruction.

Installation Procedure

Wafer Body Flowtubes1. Review the guidelines on page 18 for selecting a location for the flowtube.

2. Prepare the pipeline for the flowtube, per “Pipeline Preparation” on page 20.

3. Locate and remove all foreign objects from the piping. If possible, make up and install a section of pipe (spool piece) in the space provided for the flowtube and flush the pipeline.

4. If grounding rings are not being used (see “Flowtube Grounding” on page 22), the flowtube grounding wires will have to be attached to the pipeline flanges. To provide a connection for these wires, drill and tap a hole (1/4-20) or weld a stud to both the upstream and downstream flanges (see Figure 8).

Table 11. Inside Diameters of Grounding Rings

Flowtube Size

Flowtube Model

Grounding Ring Inside Diameter

mm in mm in

1.6 1/16 801SA 7.6 .30

3 1/8 801EA 7.6 .30

6 1/4 801QA 7.6 .30

15 1/2 800HA 15.7 0.62

25 1 8001A 26.9 1.06

40 1-1/2 801HA 41.1 1.62

50 2 8002A 50.8 2.00

80 3 8003A 75.4 2.97

100 4 8004A 100.8 3.97

150 6 8006A 152.0 5.98

24

Figure 8. Flowtube-to-Flange Grounding

5. The gaskets must be centered on the ceramic flowtube ends.

! CAUTIONAlthough Gylon Style 3510 gaskets provided with flowtube are suitable for use in most magnetic-flow applications, some hot acids may attack gasket material. If Gylon is not suitable for the application make replacement gaskets of a suitable material 1/8 inch thick and to the diameters in Table 12.

If replacement gaskets are used, the O.D. of the gasket must not exceed the values in Table 12.

6. Check that locator cams shown in Figures 9 and 10 are on flowtube. If not, install them so that lobes on both cams are facing the same direction, as shown.

7. Place flowtube in the pipeline.

NOTEThe tube can be installed with the “direction-of-flow” arrow reversed to the actual flow direction. This does not affect performance and should be done if it places the electrical connections in a better position, refer to “Mounting Position” on page 18.

Table 12. Replacement Gasket Sizes for Ceramic Tubes

Tube Size I.D. O.D.

mm in mm in mm in

1.6 to 6 1/16, 1/8, 1/4 11.5 .450 30.0 1.170

15 1/2 20.0 .780 30.0 1.170

25 1 30.5 1.200 45.0 1.765

40 1 1/2 44.7 1.760 64.0 2.525

50 2 56.5 2.220 88.0 3.465

80 3 82.0 3.220 118.0 4.645

100 4 106.0 4.175 148.0 5.815

150 6 158.0 6.210 203.0 7.985

NOTE RECOMMENDEDHOLE LOCATION -- DRILL THROUGH TO THE BOLT HOLE TO SIMPLIFYTAPPING.

DRILL AND TAP HOLE OR WELD ON STUD (1/4 - 20)

25


8. For 15 through 40 mm (1/2 through 1-1/2 in) flowtubes, loosely install two studs in one side of pipeline as shown in Figure 9. The studs are a guide to permit approximate alignment of the flowtube with the pipe. If grounding rings are being used, position them between the flowtube ends and the pipe flanges. Use additional suitable gasket material between the grounding rings and the flanges.

For 50 through 150 mm (2 through 6 in) flowtubes, loosely install two or three mounting studs to form a cradle for the flowtube as shown in Figure 10. Rest the flowtube on the mounting studs. If grounding rings are being used, position them between the flowtube ends and the pipe flanges. Use additional suitable gasket material between the grounding rings and the flanges.

Figure 9. Mounting of 15 or 25 mm (1/16 to 1-1/2 in) Wafer Body Flowtubes

Figure 10. Mounting of 40 to 150 mm (2 to 6 in) Wafer Body Flowtubes

LOCATOR CAM

GASKET

PIPE FLANGE

MOUNTING STUDS (2)

FLOWTUBE


JUNCTION BOX FORREMOTE TRANSMITTER SHOWN


FLOWTUBE

LOCATOR CAM

PIPE FLANGE

GASKET

MOUNTING STUDS

JUNCTION BOX FOR

REMOTE TRANSMITTER SHOWN

26


9. Install remaining mounting studs through pipe flange holes. Rotate locators about the flowtube axis if necessary to complete the installation of the studs. Begin tightening the flanges to the flowtube. Initially, this should be done by lightly tightening the nuts in an order that will bring the flanges flat against flowtube gaskets.

10. Refer to Figure 11. With a blunt rod and small hammer, gently tap one of the locator lobes so that it will rotate on the tube. Continue to rotate the locator until it pushes against four mounting studs and forces them out against the outside of the flange bolt holes. This will center the flowtube to the flange bolt holes and, therefore, the pipeline. If the centering cannot be done with light taps, loosen the flange nuts uniformly until the locators can center the tube. Center both ends of the tube to complete the flowtube alignment.

! CAUTIONTapping plastic locators firmly may cause them to break. When tapping locators, remove weight of flowtube from them.

Figure 11. Aligning Wafer Body Flowtube

11. Tightening the flange nuts requires special care — first, to create a uniform clamping load on the tube, and second, to avoid over-compressing the gaskets. Begin by bringing the flanges into full-face contact with the gaskets, using minimum possible torque. This should be done by tightening the nuts adjacent to the largest flange-to-gasket gaps until full circle contact is made. Then, with all nuts at least finger-tight, proceed to tighten the nuts, basically following a diametrically opposite pattern. Turn the first nut 1/6 of a turn, then move to the next nut and tighten it 1/6 of a turn. Continue this sequence until one nut on each stud has made one complete turn, or until the maximum torque spec has been reached.

! CAUTIONDo not tighten both nuts on a stud one turn each, as this overcompresses the gasket.

TAP GENTLY

LOBE ON PLASTICLOCATOR CAM

JUNCTION BOX FORREMOTE TRANSMITTER SHOWN

27


! CAUTIONThe torque values in the table are for metal flanges. If plastic flanges are used, torque nuts to lower value of table limits or flange limits.

Sanitary Flowtubes1. Review the guidelines on page 17 for selecting a location for the flowtube.

2. Prepare the pipeline for the flowtube, per “Pipeline Preparation” on page 20.

3. Locate and remove all foreign objects from the piping. If possible, make up and install a section of pipe (spool piece) in the space provided for the flowtube and flush the pipeline.

4. Remove extension tubes (ceramic tubes only), clean all parts and reassemble flowtube firmly, reclamping extension tubes to flowtube (refer to Figure 12).

Table 13. Maximum Mounting-Nut Torques for Wafer-Body Flowtubes

Flowtube SizeNumber of Bolts

in Flange

Maximum Mounting Nut Torque

N•m lb•ft.

mm in Ceramic pfa Ceramic pfa

1.6 to 15 1/16 to 1/2 4 7 7 5 5

25 1 4 14 14 10 10

40 1-1/2 4 27 27 20 20

50 2 4 75 75 55 55

8 40 40 30 30

80 3 4 80 80 60 60

8 54 54 40 40

100 4 8 54 54 40 40

150 6 8 120 95 90 70

12 80 75 60 55

28


Figure 12. Inserting Ceramic Sanitary Flowtube in Pipeline

5. For flowtube extension tubes, when tightening the Tri-Clamp connection, use special care to create a uniform clamping load on the sanitary fitting and to avoid over compressing the gaskets. See Figure 13.

a. 15 to 50 mm (1/2 to 2 in) FlowtubesWhen replacing or installing a gasket on these extension tubes, tighten the Tri-Clamp connector 1.5 full turns ±1/4 turn after initial contact.

b. 80 mm (3 in) FlowtubesWhen replacing or installing a gasket on these extension tubes, tighten the Tri-Clamp connector to 4 lb-ft. The bolt and heavy nut used are M10-1.5.

Figure 13. Tightening the Tri-Clamp Connector

EXTENSION TUBE

FLOWTUBE JUNCTION BOX

DIRECTION-OF-FLOW ARROW

15 TO 50 mm(1/2 TO 2 INCH)

80 mm (3 INCH)

29

MI 021-380 – December 2015

6. Insert and clamp flowtube into pipeline as shown in Figure 12 and Figure 14.

NOTEThe tube can be installed with the “direction-of-flow” arrow reversed to the actual flow direction. This does not affect performance and should be done if it places the electrical connections in a better position, refer to “Mounting Position” on page 18.

Figure 14. Connecting Ceramic Sanitary Flowtube to Piping

Transmitter Installation and System WiringThis chapter of this document describes the mounting of a flowtube, whether the transmitter is mounted to the flowtube or remotely mounted. For system wiring details into and out of the transmitter, and the installation of a remote IMT25 Transmitter, refer to MI 021-387.

MaintenanceSystem fault and maintenance information is described in MI 021-391 shipped with the IMT25 Transmitter. For flowtube parts, refer to the applicable flowtube parts list in Table 1. For IMT25 Transmitter parts, refer to PL 008-745.

FLOWTUBE JUNCTION BOX

PIPE CLAMP(SUPPLIED BY USER)

PIPING

FLOW

ISSUE DATESDEC 1993OCT 1995MAR 1996MAY 1996

DEC 1997DEC 2008SEP 2008DEC 2015

Vertical lines to the right of text or illustrations indicate areas changed at last issue date.

Invensys Systems, Inc.38 Neponset AvenueFoxboro, MA 02035United States of Americahttp://www.fielddevices.foxboro.com

Global Customer SupportInside U.S.: 1-866-746-6477Outside U.S.: 1-508-549-2424Website: http://support.ips.invensys.com

Copyright 1993-2015 Invensys Systems, Inc.All rights reserved.

Invensys, Foxboro, and I/A Series are trademarks of Invensys Limited, its subsidiaries, and affiliates. All other trademarks are the property of their respective owners.

Invensys is now part of Schneider Electric.

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