News

ISO 6578 “Refrigerated hydrocarbon liquids — Static measurement — Calculation procedure” has been released as a new version in October 2025 with the designation ISO 6578:2025.
This third edition cancels and replaces the second edition (ISO 6578:2017), which has been technically revised. Read our ISO 6578 news item from October 2025 for a detailed measurement standard analysis statement.
The ISO 6578 Advanced Development (AD) – also announced in the news item from October 2025 – has been released with AD note 000126. Read note 000126 for all important details of that AD.

QuantityWare is pleased to announce the publication of its QAPI BTP Integration Flow, classified by SAP as “QuantityWare Integration with Third Party” on the SAP Business Accelerator Hub. It is now available to all current and prospective QuantityWare customers to guarantee the integrity and consistency of their quantity conversions across their organisation. See
QAPI Brochure

The integration Flow is available via this link –
SAP Business Accelerator Hub – Integration Flow

For further details of QAPI, it’s required environment and licensing, check our QAPI  FAQs –
QAPI FAQs

This CSP release (CSP-004 for BCS 30A and CSP-003 for BCS 30B) contains our new QuantityCloud solution – QAPI (using BTP).

Additionally:

• All previously issued fixes since the previous CSP
• New industrial gases / natural gas & hydrogen mixture template conversion groups,
• Usability enhancements and minor corrections

are included. See the release notes in our Knowledge Base for further details.

Registered users can find all CSP files in the DataLounge within our service portal for download.

To coincide with this CSP release, we have also updated, editorially revised, and re-released virtually all documentation in a new, modern format.

ISO 6578 “Refrigerated hydrocarbon liquids — Static measurement — Calculation procedure” has been released as a new version in October 2025 with the designation ISO 6578:2025.
This third edition cancels and replaces the second edition (ISO 6578:2017), which has been technically revised.

1. As stated in the new version, the main changes are the alignment with ISO 6976:2016 physical property data and that calculation examples have been moved from the main body into an Annex.
2. In addition, calculation data in various Annexes are now designated as “informative” and not as “normative” any longer. This apparently reflects the current global business practise of signing medium and long term LNG delivery contracts which contain various sets of calculation data for the revised Klosek-McKinley equation. Since QuantityWare BCG allows the definition of customer specific data sets for ISO 6578 LNG or LPG density calculations, QuantityWare BCG implementations for LNG are compliant with ISO 6578:2025.
3. For LPG, the alternative density calculation models (Francis equation and COSTALD routine) are both not referenced (as informative) any longer. The simplified density calculation formula is provided with molar volume data (at 15 °C, only) as informative data. This density calculation formula may be combined – for LPG with less than 20 % unsaturated hydrocarbons – with the ISO 91:2017 LPG volume correction factor standards (i.e. GPA 8217 / API MPMS Chapter 11.2.4).
4. For LPG with more than 20 % unsaturated hydrocarbons, no guidance is apparently available (as both the Francis equation and COSTALD routine are no longer referenced).

In August 2025, the API has published API MPMS Chapter 11.5.1 – Errata 2 . QuantityWare experts have carefully analyzed this errata and confirm that the correction defined in that errata has been implemented proactively in the BCP implementations since 2009.

QuantityWare is preparing the release of QAPI in Q4 2025.

Detailed documentation is now available via the Knowledge Base and FAQs on this website to allow customers to gain first impressions.

About QAPI

QAPI is an Application Program Interface (API), which extends access to the bulk quantity calculations in QuantityWare’s Bulk Calculations Solution (BCS) to any system, anywhere in a company’s landscape.

The outcome is a single set of trusted and verifiable bulk quantity conversions, which can be used across an enterprise.

QAPI Release

QAPI will be included in the following Q4 2025 BCS CSP Releases:

• • ECC Systems: BCS 30A CSP-004
  • S/4 HANA Systems: BCS 30B CSP-003

QAPI will be available for QuantityWare customers.

API MPMS Chapter 12.2 “Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction Factors”, has been released in August 2025 as 3rd Edition. QuantityWare has carefully analyzed this important calculation model standard. With respect to a calculation result impact on the supported QuantityWare BCS calculation models, this new edition of API MPMS Chapter 12.2 does not deliver any relevant changes.