ASTM E947

ASTM E947 is a technical specification for sampling single-phase geothermal liquid or steam for chemical analysis. It helps define a consistent approach to collecting representative samples so laboratory results can better reflect actual fluid conditions. By focusing on sampling practice rather than analysis alone, this ASTM standard supports more reliable data for geothermal evaluation, process monitoring, and quality control. For teams working with geothermal fluids, ASTM E947 provides an important framework for consistency and comparability.

ASTM E947 standard overview

The official title of ASTM E947 identifies it as a standard specification centered on sampling single-phase geothermal liquid or steam for chemical analysis. Its role is to guide how samples are obtained from geothermal systems so they are suitable for later chemical testing. In practical terms, this makes the standard relevant to procedures that depend on sample integrity, representativeness, and repeatable handling. As an ASTM document, it supports a more disciplined technical workflow when chemical composition must be assessed with confidence.

Where is ASTM E947 used?

ASTM E947 is commonly used in geothermal settings where a single-phase liquid or steam stream must be sampled for laboratory chemical analysis. It is relevant to field sampling operations, site investigations, and technical programs that evaluate geothermal fluid chemistry. The standard is especially useful when sampling conditions need to be controlled closely to preserve the character of the fluid being tested. ASTM E947 may also support procedures connected to plant monitoring, resource assessment, and analytical reporting.

Practical importance of ASTM E947

In practice, ASTM E947 helps reduce variability in sampling and improves the reliability of chemical data derived from geothermal fluids. Consistent sampling methods can support compliance efforts, procurement specifications, and internal quality control programs. The standard also helps limit the risk of collecting non-representative samples that could lead to misleading test results or poor engineering decisions. For organizations that depend on dependable geothermal chemistry data, ASTM E947 adds structure and consistency to the sampling process.

• Single-phase geothermal liquid or steam
• Chemical analysis sampling focus
• Representative field sample collection
• Consistent technical workflow
• Supports quality and comparability