ISO TR 12148-2009 PDF

Full title and description

St ISO TR 12148-2009 — Natural gas — Calibration of chilled mirror type instruments for hydrocarbon dewpoint (liquid formation). This technical report describes principles and general requirements for traceable calibration of chilled‑mirror hydrocarbon‑dew‑point instruments used to determine potential hydrocarbon liquid content in natural gas and similar gases.

Abstract

ISO/TR 12148:2009 provides guidance on calibrating automatic chilled‑mirror hydrocarbon‑dew‑point instruments using the indirect automatic weighing method (method B) of ISO 6570:2001 and notes that the manual weighing method (method A) may be used where gas composition is constant. The report also gives background on condensation behaviour of natural gases and describes measurement techniques related to hydrocarbon dew point and potential hydrocarbon liquid content; its calibration procedure is primarily intended for downstream processed natural‑gas applications.

General information

• Status: Published (Technical Report).
• Publication date: February 2009 (ISO bibliographic entry: 2009-02; national records indicate 18 February 2009).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 75.060 (Natural gas).
• Edition / version: Edition 1 (2009-02).
• Number of pages: 31 (official ISO record).

Scope

Defines the principles and general requirements for a traceable calibration procedure for automatic hydrocarbon‑dew‑point chilled‑mirror instruments intended to determine potential hydrocarbon liquid content in natural gas (or similar gases). The procedure is based on the indirect automatic weighing method (method B) of ISO 6570:2001; where gas composition is constant, the manual weighing method (method A) of ISO 6570:2001 may also be applied. The report is aimed primarily at downstream applications (transfer of processed natural gas), although use upstream is not excluded where experience and applicability permit.

Key topics and requirements

• Traceable calibration practices for chilled‑mirror hydrocarbon‑dew‑point instruments.
• Use of ISO 6570:2001 weighing methods — indirect automatic weighing (method B) as the principal calibration route; manual weighing (method A) applicability noted.
• Characterization of condensation behaviour of natural gases and implications for dew‑point measurement.
• Requirements to determine potential hydrocarbon liquid content for verification, adjustment or calibration of instruments.
• Guidance targeted to downstream transfer and custody/quality measurement contexts, with commentary on upstream applicability limitations.

These topics and requirements are described in the Technical Report text and its supporting references.

Typical use and users

Calibration laboratories, gas‑analysis laboratories, instrument manufacturers and service organisations, pipeline and gas‑processing operators, metrology institutes and quality assurance personnel responsible for measurement traceability and custody transfer quality control in downstream natural‑gas operations.

Related standards

ISO/TR 12148:2009 references and complements ISO 6570:2001 (weighing methods for hydrocarbon dew point / potential hydrocarbon liquid content) and sits within the ISO/TC 193 family of natural‑gas analysis and related standards (for example other ISO/TC 193 guidance and measurement standards on composition, dew point and sampling). Users commonly consult ISO 6570 and related ISO/TC 193 publications alongside this Technical Report.

Keywords

hydrocarbon dew point, chilled mirror, calibration, natural gas, condensation behaviour, potential hydrocarbon liquid content, ISO 6570, traceability, weighing method.

FAQ

Q: What is this standard?

A: ISO/TR 12148:2009 is a Technical Report providing guidance on traceable calibration of chilled‑mirror hydrocarbon‑dew‑point instruments used to determine potential hydrocarbon liquid content in natural gas.

Q: What does it cover?

A: It covers principles and general requirements for calibration (principally using the indirect automatic weighing method B from ISO 6570:2001), background on condensation behaviour of natural gases, and guidance on using resultant data for verification, adjustment or calibration of instruments—mainly in downstream applications.

Q: Who typically uses it?

A: Calibration and testing laboratories, instrument makers and service providers, pipeline and distribution operators, metrology institutes and QA personnel involved with natural‑gas quality and custody transfer.

Q: Is it current or superseded?

A: As published in February 2009, ISO/TR 12148:2009 is listed as a published Technical Report in the ISO catalogue and was subject to periodic review; users should check the ISO catalogue or their national standards body for any subsequent confirmation, revision or withdrawal notices. The original ISO bibliographic record indicates the 2009 publication and current published status.

Q: Is it part of a series?

A: It forms part of the ISO/TC 193 family of standards and technical reports addressing natural‑gas analysis and related measurement methods; it specifically cross‑references ISO 6570 and is intended to be used alongside other ISO/TC 193 standards.

Q: What are the key keywords?

A: Hydrocarbon dew point; chilled mirror; calibration; potential hydrocarbon liquid content; natural gas; ISO 6570; traceability.