S-G-03–Specifications for the approval of type of gas metering devices–Part 6

Category: Gas
Issue date:
Effective date:
Revision number: 3
Supersedes: S-G-03 (rev. 2)

Part 6: Coriolis mass flow meters

Table of contents

1.0 Scope

This part of the Specifications applies to meters which measure mass flow rate of a flowing gas.

2.0 Unit requirements

Note: The following requirements of Part 1, section 1.0 apply:

  • 1.1 Use of units
  • 1.2 Metric units of measure
  • 1.3 Display of units of measure for non-trade purposes

2.1 Unit of measurement

The unit of measurement must be the kilogram.

3.0 Metrological requirements

Notes: The following requirements of Part 1, section 2.0 apply:

  • 2.1 Rated operating conditions
  • 2.2 Flow rate characteristics
  • 2.3 Maximum permissible errors
  • 2.4 Weighted mean error
  • 2.5 Repeatability
  • 2.6 Working pressure
  • 2.7 Temperature
  • 2.9 Vibrations and shocks
  • 2.10 Orientation
  • 2.11 Flow direction

According to the characteristics of the meter, the following requirements may also apply:

  • 2.14 Different gases
  • 2.15 Influences from ancillary devices

3.1 Maximum permissible errors

The error of the true mass registration must not exceed the maximum permissible errors (MPE) indicated below in Table 1.

Part 6, Table 1: Coriolis mass flow meter maximum permissible errors
Test conditions Flow rate (Q) MPE
Reference
or "other than reference"		 Qmin ≤ Q ≤ Qt ± 1.5%
Qt ˂ Q ≤ Qmax ± 1.0%

4.0 Technical requirements

Notes: The following requirements of Part 1, section 3.0 apply:

  • 3.1 Design, composition and construction
  • 3.4 Case
  • 3.5 Zero flow
  • 3.6 Flow direction
  • 3.7 Indication
  • 3.8 Output
  • 3.9 Power sources
  • 3.10 Software
  • 3.12 Registration

According to the characteristics of the meter, the following requirements may also apply:

  • 3.2 Minimum temperature range
  • 3.3 Automatic volume conversion
  • 3.11 Compressibility factor

5.0 Marking requirements

Notes: The following requirements of Part 1, section 4.0 apply:

  • 4.1 Permanency and legibility
  • 4.2
    • (a) Departmental approval number
    • (b) Manufacturer's name or registered trademark
    • (c) Model or type designation
    • (d) Serial number
    • (e) Ambient temperature range, where less than -30 °C to 40 °C
    • (f) Pmin (where applicable) and Pmax
    • (g) Qmax
    • (h) Qmin
    • (i) Qt
    • (j) Gas temperature range for which the errors ≤ MPE
  • 4.9 External power supply
  • 4.10 Software
  • 4.12 Inspection number
  • 4.13 Verification marks

According to the characteristics of the meter, the following requirements may also apply:

  • 4.4 Temperature converted volume
  • 4.5 Pressure converted volume
  • 4.6 Unidirectional flow measurement
  • 4.7 Bidirectional flow measurement
  • 4.14 Operating information
  • 4.15 Ancillary devices

6.0 Sealing requirements

Notes: The following requirements of Part 1, section 5.0 apply:

  • 5.1 General
  • 5.2 Electronic gas metering devices

7.0 Administrative requirements

Note: The requirements of Part 1, section 6.0 apply.

8.0 Performance test requirements

Note: Test conditions and performance tests can be obtained by contacting MC.

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