SIST EN ISO 10101-1:2022

Name: SIST EN ISO 10101-1:2022 — Natural gas - Determination of water by the Karl Fischer method - Part 1: General requirements (ISO 10101-1:2022)
SKU: SIST EN ISO 10101-1:2022
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Natural gas - Determination of water by the Karl Fischer method - Part 1: General requirements (ISO 10101-1:2022)

Название (английский):

Natural gas - Determination of water by the Karl Fischer method - Part 1: General requirements (ISO 10101-1:2022)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 15 ноября 2022 г.
ICS:: 75.060
Технический комитет:: DPL - Gas supply

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Описание (английский):

This document specifies general requirements for the determination of water in natural gas using the Karl Fischer method (see Reference [1]). ISO 10101-2 and ISO 10101-3 specify two individual methods of determination, a titration procedure and a coulometric procedure, respectively.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview - EN ISO 10101-1:2022 (Natural gas / Karl Fischer)

EN ISO 10101-1:2022 specifies the general requirements for determining water in natural gas using the Karl Fischer (KF) method. It is the Part 1 document in the ISO 10101 series and sets the framework for the two specific analysis techniques defined in companion standards: ISO 10101-2 (volumetric/titration) and ISO 10101-3 (coulometric). The standard is intended for laboratories, gas producers, transmission/distribution operators and testing bodies performing moisture analysis on natural gas.

Key topics and technical requirements

Scope and principle: Defines the KF reaction basis (iodine / sulfur-dioxide in methanol or related reagents) and the stoichiometric relation between iodine and water used to calculate moisture content.

Two KF techniques:

Volumetric (titration) - recommended for larger water amounts (suitable range noted in the ISO introduction).
Coulometric - micro-method ideal for very low water quantities; iodine is generated electrochemically.

Reactions and interferences:

Identifies gas constituents that can interfere (oxidizing/reducing agents, H2S, mercaptans, basic nitrogen compounds).
Provides guidance on correcting for hydrogen sulfide and mercaptan interference when their concentrations are below certain limits; recommends sulfur-speciation measurement methods (e.g., gas chromatography – see ISO 19739).

Sampling requirements:

Sampling to follow ISO 10715 guidelines.
Maintain gas temperature above dew point; heat sampling equipment if necessary.
Materials in contact with the gas should be steel, glass or suitable inert materials; connectors often use fluoroelastomers.

Measurement uncertainty:

Recommends estimating uncertainty from interlaboratory comparison data (ISO 5725-2) and applying guidance in ISO 21748; expanded uncertainty (k=2) is used for reporting.

Applications and who uses it

Quality control and custody transfer testing for natural gas moisture content.

Engineering and operations teams monitoring pipeline condition, preventing hydrate formation and corrosion.

Analytical and testing laboratories performing KF titration or coulometry for gas analysis.

Manufacturers of gas analyzers and sampling equipment that must meet standardized sampling and measurement practices.

Related standards

ISO 10101-2 - Karl Fischer titration procedure for natural gas

ISO 10101-3 - Karl Fischer coulometric procedure for natural gas

ISO 10715 - Natural gas sampling guidelines

ISO 14532 - Natural gas vocabulary

ISO 19739 - Methods for sulfur compounds (relevant for interference correction)

ISO 5725-2 / ISO 21748 - Guidance on measurement uncertainty and validation

This standard is essential for consistent, accurate water determination in natural gas using the Karl Fischer method and for ensuring comparable results across laboratories and the gas supply chain.

SIST EN ISO 10101-1:2022

Abstract

Похожие стандарты

Overview - EN ISO 10101-1:2022 (Natural gas / Karl Fischer)

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

ISO 10101-1:2022

Natural gas — Determination of water by the Karl Fischer method — Part 1: General requirements

SIST EN ISO 10101-2:2022

Natural gas - Determination of water by the Karl Fischer method - Part 2: Volumetric procedure (ISO 10101-2:2…

SIST EN ISO 10101-3:2022

Natural gas - Determination of water by the Karl Fischer method - Part 3: Coulometric procedure (ISO 10101-3:…

SIST EN ISO 19739:2006/AC:2009

Natural gas - Determination of sulfur compounds using gas chromatography (ISO 19739:2004/Cor 1:2009)

SIST EN ISO 10715:2023

Natural gas - Gas sampling (ISO 10715:2022)

SIST ISO 5725-2:2020

Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determina…

SIST ISO 21748:2017

Guidance for the use of repeatability, reproducibility and trueness estimates in measurement uncertainty eval…

ISO 14532:2026

Natural gas — Vocabulary