Turbine Flowmeters

IPE Engineering Practice IPE-EP-12-1-14

Document number: IPE-EP-12-1-14 · Section: 12 — Instruments and Controls

SCOPE

This Practice presents detailed requirements for Turbine flowmeters. All Turbine flowmeters shall be supplied in strict accordance with EP 12–1–14 DS, this practice, and other referenced Practices and Industry Standards.
Insertion–type turbine meters are not covered by this Practice.
Any deviation from this Practice must be approved by the procedure described in EP 1–1–3.
A revision bar indicates all changes made to this Revision.

2.0 REFERENCES

The following codes and standards shall be considered as part of this Practice. All documents shall be the latest editions in force on the date of issuance of this Practice.

STANDARDS AND PUBLICATIONS

IPE Engineering Practices
EP 1–1–3 Deviations to IPE Engineering Practices EP 5–2–2 Flanges, Gaskets and Bolting EP 5–4–5 Strainers for Rotating and Other Rotating Equipment EP 12–1–1 Control Systems EP 12–1–2 Supplemental Requirements for Control Systems EP 12–1–14 DS Turbine Flowmeters Data Sheet
ASME
B 1.20.1 Pipe Threads General Purpose (Inch)
NEMA
ICS 6 Enclosures for Industrial Controls and Systems
NFPA
70 National Electrical Code

DEFINITIONS

Contractor - Company or business that agrees to furnish materials or perform specified services at a specified price and/or rate to the Owner.
Inspector - A Inflection Point Engineering, LLC appointed engineer or inspector.
Manufacturer - The recipient of a direct or indirect purchase order for materials and/or equipment. In this context, a direct order is one issued to a manufacturer by a contractor or the Owner. An indirect order is one issued to a manufacturer by a vendor (recipient of a direct order) for materials, fabricated components, or subassemblies.
Owner - Inflection Point Engineering, LLC .

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Owner’s Engineer - A Inflection Point Engineering, LLC appointed engineer.

Purchaser - The party placing a direct purchase order. The purchaser is the Owner’s designated representative.

GENERAL

The equipment shall consist of a measuring element and associated transmitter/electronics.

The pressure temperature rating of the measuring element shall be equivalent to Class 600 ANSI flange rating minimum for elements having threaded or socketweld connections, and to the specified flange for elements having flanged connections.

The dimensions and ratings of flanges shall conform to EP 5–2–2.

All threaded connections shall be tapered and shall conform to ASME B1.2.1.

Design and materials not specified shall be in accordance with the manufacturer’s standards suitable for the operating and design conditions specified on the Data Sheet.

All electrical conduit connections shall be internally threaded 1/2 inch NPT.

Linearity: 0.5% maximum deviation from the average sensitivity (K) across the linear range. Repeatability: 0.1% maximum deviation from the actual flow rate over the linear flow range Strainers shall comply with EP 5–4–5.

INSTRUMENT ENCLOSURES

Turbine flowmeters and amplifiers shall be listed by Factory Mutual (FM) or Underwriters Laboratory (UL) for the National Electrical Code (NEC) area classification Class 1, Groups B, C, and D, Division 2. In addition, enclosures shall be weatherproof NEMA type 4.

CALIBRATION

Transmitters shall be factory calibrated for the range specified on the Data Sheet.

INSTRUCTIONS FOR DATA SHEET

The following numbers correspond to the line numbers on the Data Sheet:

1.	Show meter tag number
2.	Refers to process service or application
3.	Give line number or process area
4.	Specify line size and schedule
5.	Specify size and style on connections, such as 1 in NPT, 2 in 300 #RF
6.	Pressure and temperature design rating required
7.	Nominal flow range is obtained from manufacturer’s data. This usually defines the linear range of the selected meter
8.	Turbine meter accuracy figures are in terms of percent of instantaneous flow rate.
9.	Degree of linearity over nominal flow range

10.	K factor relates cycles per second to volume units. Enter this figure after selection is made.
11.	Excitation modulating type only express as volts at hertz.
12-	16 Specify materials of construction or write in ”MFR. STD.”
17.	Specify sleeve or ball bearings, or none if floating rotor design
18.	Bearing material - will be MFR STD if not stated otherwise.
19.	Maximum speed or frequency which the meter can produce without physical damage.
20.	Minimum output voltage: volts peak to peak.
21.	Pickoff may be standard, high temp, radio frequency.
22.	Specify electrical classification of enclosure: NEMA 4, Class 1, Group D. Div 2, etc
24-33	Specify fluid data as indicated
34.	Give tag number of secondary if different from meter tag
35.	Pre–amplifier if used.
36.	Specify function of instrument, such as rate indicator, totalizer, etc.
37.	Flush, surface or rack
38.	Power supply, ---volts AC, DC
39.	Applies to rate indicator
40.	Give output range such as 4-20 mA
41.	May be used for number of digits, and to state whether counter is reset or non– reset type.
42.	Specify range of compensation, if required, in pressure and/or temperature units.
43.	Pre–set counter
44.	Specify NEMA classification of enclosure
45.	Specify strainer size and mesh size. Request vendors recommendation if not known.
46-51	Fill in after selection is made.

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Disclaimer. This material is provided for informational and educational purposes only and does not constitute professional engineering advice. Calculations, reference data, and methodologies are based on published standards and accepted engineering practice but are not a substitute for engineering judgment, site-specific analysis, or review by a licensed Professional Engineer. Inflection Point Engineering, LLC makes no warranties, express or implied, regarding the accuracy, completeness, or fitness for a particular purpose of any content presented here, and shall not be liable for any direct, indirect, incidental, or consequential damages arising from its use. Users assume all risk associated with applying this content to real-world design, operations, or decisions.