What is ISO 15112 about?
ISO 15112 provides the means for energy determination of natural gas by measurement or by calculation and describes the related techniques and measures that are necessary to take. The calculation of thermal energy is based on the separate measurement of the quantity, either by mass or by volume, of gas transferred and its measured or calculated calorific value. The general means of calculating uncertainties are also given.
ISO 15112 applies to any gas-measuring station from domestic to large high-pressure transmission.
Note: Gas-measuring systems are not the subject of ISO 15112.
Who is ISO 15112 for?
ISO 15112 on the energy determination is relevant to:
- Gas transporters
- Regional distributors
- Local distribution companies
- Petrochemical industries
- Oil and natural gas industry
Why should you use ISO 15112?
Energy determination is frequently a necessary factor wherever and whenever natural gas is metered, from production and processing operations through to end-user consumption.
Because of the increasing value of energy and variations in gas quality, billing based on thermal energy has now become essential between contracting partners, and the need to determine calorific value by measurement or calculation has led to several techniques.
ISO 15112 covers aspects related to production/transmission and distribution/end-user. ISO 15112 provides guidance to users of how energy units for billing purposes are derived, based on either measurement or calculation or both, to increase confidence in results for contracting partners. Other standards relating to natural gas, flow measurement, calorific value measurement, calculation procedures, and data handling about gas production, transmission, and distribution involving the purchase, sales, or commodity transfer of natural gas can be relevant to ISO 15112.
ISO 15112 assists the user with the method to derive a calorific value to be applied to the gas passing specified interfaces having only volume measurements. ISO 15112 also assists with the systematic difference between the true energy and the actual energy determined of the gas passing a gas‑measuring station.
The method of energy determination depends on several key factors; they shall be considered for the suitable energy-determination strategy to support the user of ISO 15112 to perform a correct energy determination.
Overall, ISO 15112 is useful as it encompasses the requirements of what information is necessary and how it should be obtained to fulfil the needs of the energy-determination strategy of natural gas, considering the expected course of data.
What’s changed since the last update?
BS EN ISO 15112:2018 supersedes BS EN ISO 15112:2014, which is withdrawn.
BS EN ISO 15112:2018 replaces the second edition (ISO 15112:2011), which has been technically revised. The main changes compared to the previous edition are as follows:
- Figures 7 and 8 have been redrafted
- Clause 9 has been updated
- Annex K has been added