ASTM D6301-21 PDF

Full title and description

Standard Practice for Collection of On-Line Composite Samples of Suspended Solids and Ionic Solids in Process Water — practice describing the use of a corrosion-product sampler (a high‑pressure filter housing with flow totalizer and 47‑mm, 0.45 µm membrane filters and optional ion‑exchange membranes) to obtain integrated, representative samples of suspended solids and, optionally, ionic solids from condensed steam or process waters (for example boiler feedwater) for corrosion-product monitoring and analysis.

Abstract

This practice specifies procedures and apparatus considerations for on‑line composite sampling of suspended solids and optional ionic solids in process water. It explains the typical corrosion‑product sampler configuration, requirements for filter media (0.45 µm membrane for suspended solids; optional ion‑exchange membranes for ionic species), sampling at operating pressure or after pressure reduction, and conditions for representative integrated sampling to support corrosion monitoring and diagnostic analyses in steam‑generating and process water systems.

General information

• Status: Active
• Publication date: Approved/Published 2021 (current edition D6301‑21, approved Dec 1, 2021; published December 2021)
• Publisher: ASTM International
• ICS / categories: 13.060.45 (Examination of water in general)
• Edition / version: D6301‑21
• Number of pages: 5

Scope

This practice is applicable to sampling condensed steam or process waters (such as boiler feedwater) for collection of suspended solids on a 0.45 µm membrane filter and, optionally, ionic solids on ion‑exchange media. Sampling is performed at system operating pressure or after pressure reduction, with sample temperature maintained ≤50 °C for the sampling train. The practice focuses on integrated (time/flow composite) sampling to improve sensitivity for transported corrosion products that may not be captured by grab samples.

Key topics and requirements

• Corrosion‑product sampler concept: modified stainless steel high‑pressure filter housing with flow totalizer to measure integrated sample volume.
• Filter media: 47‑mm membrane filter, nominal pore size 0.45 µm for suspended solids; optional ion‑exchange membranes for ionic solids.
• Sampling conditions: performed at system operating pressure or after controlled pressure reduction; sample temperature ≤50 °C unless cooling is provided.
• Representative composite sampling: use flow‑proportional or time‑integrated sampling to capture transient transport of corrosion products.
• Instrumentation/installation considerations: materials, pressure/temperature ratings, sample cooling and flow control to protect filter integrity and sample representativeness.
• Analytical follow‑up: filters and ion‑exchange media are suitable for subsequent gravimetric, spectroscopic, or chromatographic analysis of corrosion products and ionic species.

Typical use and users

Primary users include power‑plant water chemistry and corrosion engineers (PWR, BWR and fossil plants), plant maintenance and surveillance teams, laboratory analysts performing corrosion/product transport investigations, and vendors of sampling equipment used for boiler feedwater and other high‑pressure process waters. The standard supports routine monitoring, troubleshooting of heat‑transfer degradation, and studies of corrosion‑product transport and deposition.

Related standards

The practice references and complements other ASTM water and sampling standards used by Committee D19, including Terminology D1129 and test/practice standards such as D2332, D2777, and D3370 for related sampling, analysis, and precision/bias considerations in water‑formed deposits and process‑water analysis.

Keywords

corrosion product sampler; suspended solids; ionic solids; process water; boiler feedwater; 0.45 µm membrane filter; ion‑exchange membrane; composite sampling; flow totalizer; corrosion product transport.

FAQ

Q: What is this standard?

A: ASTM D6301‑21 is a practice that describes how to collect on‑line composite (integrated) samples of suspended solids and optional ionic solids from process waters (for example boiler feedwater) using a corrosion‑product sampler configured with a 47‑mm, 0.45 µm membrane filter and optional ion‑exchange media.

Q: What does it cover?

A: It covers sampler configuration and operation, filter and ion‑exchange media use, sampling at operating pressure or after pressure reduction, temperature limits for sampling trains, and guidance to obtain representative integrated samples suitable for subsequent analysis of corrosion products and ionic species.

Q: Who typically uses it?

A: Water chemistry and corrosion engineers, plant surveillance teams, laboratory analysts, and sampling‑equipment suppliers for power generation and other industries where corrosion‑product transport in process water is a concern.

Q: Is it current or superseded?

A: Current — the active edition is D6301‑21 (2021 edition). Check ASTM for any later revisions or reapprovals after 2021 for the most recent status.

Q: Is it part of a series?

A: It is maintained under ASTM Committee D19 (Water) and complements other D19 practices and test methods addressing sampling and analysis of water‑formed deposits and process water chemistry.

Q: What are the key keywords?

A: corrosion product sampler; suspended solids; ionic solids; composite sampling; 0.45 µm membrane; ion‑exchange membrane; boiler feedwater; process water; flow totalizer.