ISO 10715:2022

Overview

ISO 10715:2022 - Natural gas - Gas sampling defines procedures and requirements to ensure that samples of natural gas and natural gas substitutes taken from transmission and distribution grids are representative of the mass they are intended to characterize. The standard is focused on sampling natural dry gas (single-phase) used for interchangeability criteria, energy content determination, network entry conditions, fiscal measurement and trace-component analysis. It explicitly excludes sampling of wet (multi-phase) gas flows and does not cover broader safety regulations for sampling operations.

Key topics and technical requirements

ISO 10715:2022 covers the practical and technical elements required for reliable natural gas sampling:

• Principles of representative sampling - defining what makes a sample representative and how to avoid bias.
• Types of sampling methods - detailed guidance on spot sampling (fill-and-empty, controlled-rate, evacuated-cylinder, helium pre-fill, floating-piston, single cavity), incremental (composite) sampling, and online/direct sampling.
• Sampling location and position - criteria for selecting undisturbed sampling points and access considerations at transmission, distribution and cross-border stations.
• Sample handling and equipment - probes, tubing, filters, valves, pressure reducers, heating and flow-control devices; cylinder types (single-cavity, floating-piston) and cylinder tracking.
• Material and contamination control - guidance on surface treatments, polymers, rubbers, bimetallic corrosion, cleaning and pre-charging to minimize sorption and contamination.
• Phase and temperature effects - discussion of condensation, Joule–Thomson cooling, and revaporization that can impact sample integrity.
• Verification and troubleshooting - procedures for system checks, monitoring filling processes, overpressure protection and residence-time considerations.
• Informative annexes - purposes of sampling, procedural details, sorption effects, cleaning, Joule–Thomson behaviour, vortex shedding, and residence-time calculations.

Applications and who should use it

ISO 10715:2022 is relevant to organizations and professionals involved in:

• Gas transmission and distribution operators ensuring network entry quality and interchangeability.
• Fiscal metering and cross-border trade where representative sampling underpins billing and contractual agreements.
• Gas processing plants and laboratories performing compositional and trace-component analysis.
• Metering station designers, sampling equipment manufacturers, and field technicians implementing standardized sampling installations and procedures.
• Regulators and auditors evaluating sampling practices for conformity and measurement uncertainty.

Using ISO 10715 helps reduce sampling bias, improve measurement confidence for energy content and fiscal transactions, and support compliant trace-component monitoring.

Related standards

ISO 10715 should be used alongside other industry standards and national regulations covering gas analysis, flow measurement, metering, and pipeline operation to ensure an integrated approach to custody transfer and quality control of natural gas.