Category: Gas
Issue date:
Effective date:
Revision number: 3
Supersedes: S-G-03 (rev. 2)
Revisions
The purpose of revision 3 was to:
- recognize the ISO 6976 standard and update the relevant sections (Introduction, section 4.0; Part 14, sections 4.3 and 4.4; Part 16, section 4.1).
- move the dry air density requirement (previously in Part 1, section 7.3.2) to Part 2, as a footnote in section 3.1.
The purpose of revision 2 was to make the following amendments:
- General amendments:
- Reformat the document to conform to publishing requirements.
- Create the new introduction and definitions sections.
- Integrate all approval requirements for electronic gas metering devices incorporating mass to base volume and/or energy conversion functions (Part 14). These requirements were in S-G-07.
- Remove appendices A and B.
- Fix a few typos.
- Revise the terminology and definitions.
- Eliminate the duplication of requirements which were already in Part 1.
- Remove all performance test sections, now that test conditions and applicable performance tests are available on request.
- Rearrange the order of some Parts.
- Amendments to Part 1:
- Make references to the last edition of GPA2145-16, GPA 2172-14 and AGA Report No. 8.
- Introduce the notion of energy on a mass basis as well as associated requirements.
- Introduce the net-metering measurement as well as associated requirements;
- Add requirements for calorific value units, verification markings and modular design meter markings, as well as indicating requirements.
- Amendments to Part 2:
- Remove the maximum permissible error (MPE) for non-temperature compensated meters which MC does not approve.
- Amendments to Part 5:
- Rework this part to reflect that only one component (i.e. orifice fittings) of a primary element of an orifice meter is approved by MC.
- Replace AGA Report No. 3, Part 2 (Fourth edition, 2000) by AGA Report No. 3, Part 2 (Fifth edition, 2016).
- Amendments to Part 6:
- Change the tolerances for the repeatability.
- Use the weighted mean error (WME) instead of the maximum peak-to-peak error.
- Amendments to Part 7:
- Integrate all approval requirements from PS-G-06.
- Change the tolerance of ± 0.1% in subsection 3.4.
- Amendments to Part 9:
- Define the flow rate characteristics by Reynolds number.
- Add marking requirements for material or thermal expansion coefficient.
- Amendments to Part 15:
- Change "mechanical indicating devices" to "mechanical registers".
- Move requirements of proving provision in Part 1.
- Rework the requirements in subsection 4.2 (i.e. capacity).
- Amendments to Part 16:
- Migrate to a % tolerance for calorific value (energy density) and expand the MPE from ±0.5% to ±0.7% for relative density.
- Incorporate repeatability limits for gas components below 25 mol %, to be in line with limits used at verification/reverification.
- Amendments to Part 17:
- Align terminology (e.g. unit price, price to be paid) with OIML terminology;
- Add the MPE for gas flow meters only;
- Add maximum value of the MMQ depending on the type of applications (i.e. standard, heavy-duty and bulk applications);
- Revise requirements for the systematic deviation (i.e. hose pressure/compensation);
- Remove requirements for the adjustment range (less or greater than 2%);
- Add requirements for transfer points.
- Amendments to Part 20:
- Add requirements for calorific value determining devices and apply the same MPE as Part 16 for calorific value and relative density.
- Adjust the requirement for the range of relative density in subsection 4.3.
- Amendments to Part 21:
- Change the metrological requirement (i.e. improvement of half the MPE) to a technical requirement (i.e. demonstrate improvement of the accuracy of the meter installed with a flow conditioner).
- Amendments to Part 22:
- Rename that section.
- Add the metrological requirements that were in the original version of PS-G-16 and were forgotten during revision 1 below.
- Appendix A:
- Change symbol K' to K in Equation A.5.
The purpose of revision 1 was to:
- integrate the requirements of LMB-EG-08—Specifications for approval of type of gas meters and auxiliary devices into these specifications. Therefore, LMB-EG-08 has become obsolete;
- consolidate and communicate all the applicable approval requirements that have changed over the years and are currently applied during type approval evaluation;
- attempt to harmonize Canada's approval requirements with OIML recommendations;
- integrate approval requirements for fluidic oscillation meters, conditioning orifice plates, flow conditioners and cone-shaped differential pressure meters;
- integrate requirements for the approval of correction devices and linearization functions incorporated in meters and flow computers;
- reformat these specifications according to new formatting requirements.