ISO-5167 Flowrate Calculations

Introduction

ISO-5167 Flow Rate Calculations is a mobile application for Android, intended for both experts in the field of automation and metrology, and students of technical specialties. It implements methods for calculating the flow rate of liquids, vapors and gases by measuring the differential pressure on primary devices as the substances pass through them.

These methods are regulated by the ISO-5167 standard and consider the following primary devices:

• Orifice Plates
• ISA 1932 Nozzles
• Long Radius Nozzles
• Venturi Nozzles

The program accept some input parameters related to both the design of the primary device and the physical properties of the measured substance. Thanks to Hummeling Engineering many water and vapor properties, such as density, viscosity, adiabatic index and so on are calculated automatically depending on the pressure and temperature of the measured substance. The calculations are absolutely transparent, the intermediate results of the calculation are displayed in a handy report in the form of a WEB page. Sample reports are shown at the bottom of the page.

Languages: English, Русский, Deutsch, Français, Español, 中文

Getting started

Download for Android

The program consists of three main screens:

Pic. 1

Pic. 2

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• The first screen is for selecting the type of the primary device and the substance to be measured.
• The second screen is the main. It opens with pre-set data of a valid example. Here the user of the program can change any parameters of the primary device and the physical properties of the measured substance. Any changes in input data result in immediate recalculation or differential pressure on the device with unchanged flow rate or a change in flow with a constant differential pressure. It depends on the direction of calculation.
  The main calculations, however are the calculations of the flow at a given differential pressure or a derivation of a differential pressure at a given flow rate.
  This screen also has a menu, where you can save the current calculation, open a list of saved calculations, rename and delete some.
  An initial correct calculation example can not be deleted and can only be saved under a different name.
  If an error occurs when entering the device or substance properties, the program will notify with the pop-up window. The cause of the error can be seen in the report, in the third screen.
• The third screen is designed to provide a calculation order, displaying intermediate values, to show an iterative process, and output possible error messages.

Material properties editors

The properties of the materials from which the primary device and the pipeline are made have an influence on the calculation of the flow rate or differential pressure across the device.
The most important are the temperature coefficient of linear expansion of the metal of the primary device and the coefficient of surface roughness of the pipeline.

The ISO-5167 Flowrate Application contains both a table of metals for determining the coefficient of thermal expansion of a primary device for measuring flow, as well as a table of surface roughness of a pipeline.
Initially, the tables are filled with primary data in accordance with ISO-5167 / GOST 8.586.X-2005 standards.
Users of the application can edit the tables - change, delete rows. Add their own data.
Below are the default table values:

Table of thermal coefficients of expansion of metals

In the program, the change in the size of the primary device depending on the temperature, is calculated by the formula:

αt = 10^-6[a0 + a1(t / 1000) + a2(t / 1000)²], where

t is the temperature;
a0, a1 a2 - constant coefficients determined in accordance with table 1.

Table of values of the pipe wall uniform equivalent roughness, k

Application output data

Application ISO-5167 calculates and displays output values directly on the screen of a smartphone / tablet. Calculation and display of data is performed instantly when the user changes the input parameters. In addition, there is the possibility of saving data in the form of HTML reports, examples of which are given below:

Example of flowrate calculations

Orifice Plate - Liquid

Example of IAPWS-97 calculations

IAPWS-97