ASME MFC-3M

ASME MFC-3M

MEASUREMENT OF FLUID FLOW IN PIPES USING ORIFICE, NOZZLE, AND VENTURI
Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi
Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi
Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi
MEASUREMENT OF FLUID FLOW IN PIPES USING ORIFICE, NOZZLE, AND VENTURI

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Standard Details

Full Description

This Standard specifies the geometry and method of use (installation and flowing conditions) for orifice plates, nozzles, and Venturi tubes when they are inserted in a conduit running full, to determine the rate of the fluid flowing. It also gives necessary information for calculating flow rate and its associated uncertainty. It applies only to pressure difference devices in which the flow remains turbulent and subsonic throughout the measuring section is steady or varies only slowly with time and the fluid is considered single-phased. In addition, the uncertainties are given in the appropriate sections of this Standard for each of these devices, within the pipe size and Reynolds number limits which are specified. It deals with devices for which sufficient calibrations have been made to enable the specification of coherent systems of application and to enable calculations to be made with certain predictable limits of uncertainty. The devices introduced into the pipe are called primary devices. The term primary device also includes the pressure taps and the associated upstream and downstream piping. All other instruments or devices required for the measurement or transmission of the differential pressures are known as secondary elements, and in combination are referred to as the secondary devices. This Standard covers the primary devices; secondary devices will be mentioned only occasionally. The following primary devices are covered in this Standard: (a) orifice plates, which can be used with the following arrangements of pressure taps: (1) flange pressure taps, (2) D and D/2 pressure taps, (3) corner pressure taps. (b) nozzles: (1) ASME long radius nozzles. (c) Venturi tubes: (1) classical Venturi tubes. This Standard does not pipe or conduit sizes under 50 mm {2 in.} nominal. This Standard does not apply to ASME Performance Test Code measurements. The Standard is applicable to measurement of flow of any fluid, (liquid, vapor, or gas).

Product Details

Published: 01/01/2004

ISBN(s):0791829286

ANSI Approved

Number of Pages:92File Size: 2 files , 1.3 MB

Publication Date: 01/01/2007 - Complete Document

Document Type : Complete Document

Page Count : 144

Publication Date : 01/01/2007

Revision : 04

Status : Current

Title : MEASUREMENT OF FLUID FLOW IN PIPES USING ORIFICE, NOZZLE, AND VENTURI

Publication Date: 01/01/2007 - Amendment

Description :

This Standard specifies the geometry and method of use (installation and operating conditions) for pressure differential devices (including, but not limited to, orifice plates, flow nozzles, and venturi tubes) when installed in a closed conduit running full and used to determine the flow-rate of the fluid flowing in the conduit. This Standard applies to pressure differential devices in which the flow remains subsonic throughout the measuring section and where the fluid is considered as single-phase. The Standard is limited to single-phase Newtonian fluid flow in which the flow can be considered sufficiently free from pulsation effects. It gives information for calculating the flow-rate and the associated uncertainty when each of these devices is used within specified limits of pipe size and Reynolds number.

This Standard covers flow meters that operate on the principle of a local change in flow velocity and/or flow parameters caused by meter geometry, resulting in a corresponding change of pressure between two set locations. Although there are several types of differential pressure meters available, it is the purpose of this Standard to address the applications of each meter and not to endorse any specific meter. The operating principle of a pressure differential flow meter is based on two physical laws: conservation of energy and conservation of mass, realized when changes in flow cross-sectional area and/or flow path result in a change of pressure. This differential pressure, in turn, is a function of the flow velocity, fluid path, and fluid properties.

Included within the scope of this Standard are devices for which direct calibration experiments have been made, sufficient in number and data coverage, to enable valid systems of application to be based on their results and coefficients to be given with known uncertainties.

The devices installed in the pipe are referred to as primary devices, primary elements, or simply, primaries. The primary device may also include the associated upstream and downstream piping. The other instruments required for the flow measurement are often referred to as secondary devices or secondaries. For further information on secondary instrumentation, see ASME/ANSI MFC-8M.

The different primary elements covered in this Standard are as follows:

(a) orifice plates (Part 2) that can be used with the following pressure tap arrangements:

(1) flange pressure taps

(2) corner pressure taps

(3) D and D/2 pressure taps

(b) nozzles (Part 3), each of which differs in the following shape and position of the pressure taps:

(1) ASME long radius nozzles

(2) Venturi nozzles

(3) ISA 1932 nozzles

(c) ASME venturi tubes (Part 4), also known as Herschel or classical venturi tubes

Part 1 of this Standard contains general material such as definitions, symbols, and principles that apply to all the devices covered in Parts 2, 3, and 4 of this Standard with respect to the flow measurement of any single phase fluid.

This Standard does not apply to ASME Performance Test Code measurements. This Standard does not address those devices that operate on the principle of critical or choked flow condition of fluids. This Standard does not address issues of safety. It is the responsibility of the user to ensure that all systems conform to applicable safety requirements and regulations.

Document Type : Amendment

Language : English

Page Count : 50

Publication Date : 01/01/2007

Revision : 04

Status : Current

Title : Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi

Publication Date: 01/01/2004 - Base Document *

Description :

This Standard specifies the geometry and method of use (installation and operating conditions) for pressure differential devices (including, but not limited to, orifice plates, flow nozzles, and venturi tubes) when installed in a closed conduit running full and used to determine the flow-rate of the fluid flowing in the conduit. This Standard applies to pressure differential devices in which the flow remains subsonic throughout the measuring section and where the fluid is considered as single-phase. The Standard is limited to single-phase Newtonian fluid flow in which the flow can be considered sufficiently free from pulsation effects. It gives information for calculating the flow-rate and the associated uncertainty when each of these devices is used within specified limits of pipe size and Reynolds number.

This Standard covers flow meters that operate on the principle of a local change in flow velocity and/or flow parameters caused by meter geometry, resulting in a corresponding change of pressure between two set locations. Although there are several types of differential pressure meters available, it is the purpose of this Standard to address the applications of each meter and not to endorse any specific meter. The operating principle of a pressure differential flow meter is based on two physical laws: conservation of energy and conservation of mass, realized when changes in flow cross-sectional area and/or flow path result in a change of pressure. This differential pressure, in turn, is a function of the flow velocity, fluid path, and fluid properties.

Included within the scope of this Standard are devices for which direct calibration experiments have been made, sufficient in number and data coverage, to enable valid systems of application to be based on their results and coefficients to be given with known uncertainties.

The devices installed in the pipe are referred to as primary devices, primary elements, or simply, primaries. The primary device may also include the associated upstream and downstream piping. The other instruments required for the flow measurement are often referred to as secondary devices or secondaries. For further information on secondary instrumentation, see ASME/ANSI MFC-8M.

The different primary elements covered in this Standard are as follows:

(a) orifice plates (Part 2) that can be used with the following pressure tap arrangements:

(1) flange pressure taps

(2) corner pressure taps

(3) D and D/2 pressure taps

(b) nozzles (Part 3), each of which differs in the following shape and position of the pressure taps:

(1) ASME long radius nozzles

(2) Venturi nozzles

(3) ISA 1932 nozzles

(c) ASME venturi tubes (Part 4), also known as Herschel or classical venturi tubes

Part 1 of this Standard contains general material such as definitions, symbols, and principles that apply to all the devices covered in Parts 2, 3, and 4 of this Standard with respect to the flow measurement of any single phase fluid.

This Standard does not apply to ASME Performance Test Code measurements. This Standard does not address those devices that operate on the principle of critical or choked flow condition of fluids. This Standard does not address issues of safety. It is the responsibility of the user to ensure that all systems conform to applicable safety requirements and regulations.

Document Type : Base Document

Edition : Date of Issuance: 8/15/2005

Language : English

Page Count : 94

Publication Date : 01/01/2004

Revision : 04

Status : Current

Title : Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi

Publication Date: 01/01/1989 - Complete Document Changes Incorporated *

Description :

SCOPE AND FIELD OF APPLICATION

This Standard specifies the geometry and method of use (installation and flowing conditions) for orifice plates, nozzles, and Venturi tubes when they are inserted in a conduit running full, to determine the rate of the fluid flowing. It also gives necessary information for calculating flow rate and its associated uncertainty.

It applies only to pressure difference devices in which the flow remains turbulent and subsonic throughout the measuring section, is steady or varies only slowly with time and the fluid is considered single-phased. In addition, the uncertainties are given in the appropriate sections of this Standard for each of these devices, within the pipe size and Reynolds number limits which are specified.

It deals with devices for which sufficient calibrations have been made to enable the specification of coherent systems of application and to enable calculations to be made with certain predictable limits of uncertainty.

The devices introduced into the pipe are called primary devices. The term primary device also includes the pressure taps and the associated upstream and downstream piping. All other instruments or devices required for the measurement or transmission of the differential pressures are known as secondary elements, and in combination are referred to as the secondary devices. This Standard covers the primary devices; secondary devices will be mentioned only occasionally.

The following primary devices are covered in this Standard:

(a) orifice plates, which can be used with the following arrangements of pressure taps:

(1) flange pressure taps

(2) D and D/2 pressure taps

(3) corner pressure taps

(b) nozzles:

(1) ASME long radius nozzles

(c) Venturi tubes:

(1) classical Venturi tubes.

This Standard does not cover pipe or conduit sizes under 50 mm [2 in.] nominal.

This Standard does not apply to ASME Performance Test Code measurements.

This Standard is applicable to measurement of flow of any fluid, (liquid, vapor, or gas).

Document Type : Complete Document

Edition : Errata - September 1990

Language : English

Page Count : 80

Publication Date : 01/01/1989

Revision : 89

Status : Historical

Supplement : W/

Title : Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi

Publication Date: 12/31/1985 - Complete Document

Document Type : Complete Document

Language : English

Page Count : 64

Publication Date : 12/31/1985

Revision : 85

Status : Historical

Title : MEASUREMENT OF FLUID FLOW IN PIPES USING ORIFICE, NOZZLE, AND VENTURI

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