ISO TR 12748-2015 PDF

Full title and description

ISO/TR 12748:2015 — Natural Gas — Wet gas flow measurement in natural gas operations. This technical report provides guidance on production flow measurement of wet natural gas streams using wet gas flow meters (WGFMs) in surface and subsea installations, including terminology, best practices and practical considerations for design and operation.

Abstract

ISO/TR 12748:2015 describes production flow measurement of wet natural gas streams with WGFMs in surface and subsea facilities. It defines terms and symbols, explains concepts specific to wet-gas metering, outlines metering techniques and testing, and gives recommendations for installation, commissioning, operation, maintenance, calibration and verification. The report also provides theoretical background for wet-gas measurement methods.

General information

• Status: Published (active).
• Publication date: 14 October 2015 (Edition 1, 2015-10).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 75.060; 75.180.30.
• Edition / version: Edition 1 (2015).
• Number of pages: 92 pages.

Details above are taken from the ISO catalogue entry for this technical report.

Scope

This Technical Report addresses measurement of gas-dominated flows containing liquid (water and/or hydrocarbons) in natural gas production operations. It covers principles and practical guidance for wet-gas flow meter selection, design considerations, testing and performance evaluation, plus installation, commissioning and operational practices for both surface and subsea metering systems. The scope is intended to help operators, designers and metrology personnel manage the specific challenges of wet-gas measurement.

Key topics and requirements

• Definitions and symbols for wet-gas measurement; clear terminology for gas-dominated multiphase streams.
• Overview of wet gas flow meter (WGFM) types and design considerations for surface and subsea applications.
• Metering techniques and theoretical background relevant to wet-gas conditions.
• Guidance on factory and field testing, acceptance tests and performance verification.
• Installation and commissioning best practices to minimise measurement uncertainty in wet-gas environments.
• Operational recommendations: maintenance, routine calibration, verification and troubleshooting for WGFMs.
• Considerations for liquid carryover, flow regime effects and uncertainty assessment specific to wet-gas streams.

Typical use and users

Primary users are oil & gas operators, metering and instrumentation engineers, subsea system designers, custody transfer specialists, flow measurement consultants, testing laboratories and regulatory bodies concerned with accurate production measurement where gas flows contain liquid phases. The report is used for designing metering systems, developing procedures for commissioning and maintenance, and informing uncertainty analyses for wet-gas production streams.

Related standards

ISO/TR 12748:2015 sits among other ISO deliverables and industry documents addressing flow measurement and gas quality. Related ISO work and committees include ISO/TC 193/SC 3 (Upstream area, wet-gas measurement working groups). Other technical reports and standards often referenced in wet-gas metering work include ISO technical reports on wet-gas topics and general flow-measurement standards (for example, standards and TRs addressing venturi/orifice flow elements and wet-gas testing methods). Users commonly consult ISO/TC 193 outputs and pertinent industry guidelines when applying ISO/TR 12748.

Keywords

wet gas; natural gas; wet gas flow meter; WGFM; wet-gas metering; subsea metering; production measurement; flow measurement; calibration; installation; custody transfer; measurement uncertainty.

FAQ

Q: What is this standard?

A: ISO/TR 12748:2015 is a technical report that provides guidance on measuring wet natural gas flows (gas streams containing liquid) using wet gas flow meters in surface and subsea production operations.

Q: What does it cover?

A: It covers terminology, theoretical background, meter design and selection considerations, metering techniques, testing and performance verification, installation and commissioning practices, and operational activities including maintenance, calibration and verification specific to wet-gas measurement.

Q: Who typically uses it?

A: Operators, metering and instrumentation engineers, subsea and topside designers, flow measurement specialists, test houses and regulators involved in measurement of production streams where liquid carryover is present.

Q: Is it current or superseded?

A: As of the ISO catalogue entry, ISO/TR 12748:2015 is published (Edition 1, 14 October 2015) and listed as the active technical report. Users should check the ISO catalogue or national standards bodies for any subsequent revisions or confirmations beyond this publication date.

Q: Is it part of a series?

A: It is a technical report produced under ISO/TC 193/SC 3 (Upstream area, which includes wet-gas measurement working groups). It complements other ISO standards and technical reports addressing flow measurement and natural gas quality; it is not a numbered "part" of a single multipart standard but rather a TR within the committee's portfolio.

Q: What are the key keywords?

A: Wet gas, WGFM, natural gas metering, subsea metering, production measurement, calibration, installation, measurement uncertainty. (These reflect the subject focus of ISO/TR 12748:2015.)