ASTM D7430/D7430M-22 PDF

Full title and description

ASTM D7430/D7430M-22 — Standard Practice for Mechanical Sampling of Coal. This practice consolidates multiple previous ASTM practices into a single, four-part document that provides guidelines for design, operation, testing, and evaluation of mechanical coal sampling systems to obtain representative samples for analysis and contractual/quality purposes.

Abstract

This standard is organized in four parts (A, B, C, and D) and covers mechanical sampling procedures for conveyed and stored coal, equipment inspection and documentation, sample handling and preparation (with reference to Practice D2013/D2013M), and statistical bias testing of sampling systems and components. It is intended to ensure representative sampling and to support accurate evaluation of coal quality, specification compliance, and lot value.

General information

• Status: Active.
• Publication date: 1 November 2022 (designation: -22).
• Publisher: ASTM International.
• ICS / categories: 75.160.10 (Solid fuels); 73.040 (Coals).
• Edition / version: D7430/D7430M-22 (current edition, 2022).
• Number of pages: 47.

Scope

This practice is divided into four parts (A–D) that together replace and incorporate the previous Practices D7256/D7256M, D4916, D4702, and D6518. Parts address the mechanical collection of coal samples from moving streams and storage, recommended hardware and system design features, inspection and documentation requirements, sample preparation references, and statistical procedures for bias testing of complete sampling systems and individual components (including auger systems). The standard notes the user’s responsibility for safety and for selecting appropriate procedures for specific sampling situations.

Key topics and requirements

• Organization into Parts A–D to cover the spectrum of mechanical sampling activities (design, installation, operation, testing, and maintenance).
• Requirements for mechanical sampling equipment, cutters, and collection devices to obtain representative increments and increments handling.
• Documentation and inspection procedures required when conducting sampling system inspections and acceptance testing.
• Reference to sample preparation Practice D2013/D2013M for laboratory sample reduction and conditioning prior to analysis.
• Statistical methods and procedures for bias testing of whole systems and individual components, including guidance on evaluating sampler bias and population mean differences.
• Use of SI units as the standard measurement system and notes on safety responsibilities for users.

Typical use and users

This practice is used by coal producers, fuel purchasing and trading organizations, power utilities, terminal operators, contract and QA/QC laboratories, equipment manufacturers, and engineers responsible for specifying, procuring, installing, commissioning, and auditing mechanical sampling systems for coal. It supports contractual sampling regimes, acceptance testing, and routine quality assurance sampling programs.

Related standards

This standard directly consolidates or references the following ASTM practices: D7256 / D7256M, D4916, D4702, and D6518 (now incorporated as parts of D7430/D7430M). It also references Practice D2013/D2013M for sample preparation and other ASTM practices relevant to fuel testing and QA procedures as appropriate.

Keywords

mechanical sampling, coal sampling, sampling system, bias testing, sample preparation, quality assurance, auger sampling, inspection, ASTM D7430, D7430M-22

FAQ

Q: What is this standard?

A: ASTM D7430/D7430M-22 is the Standard Practice for Mechanical Sampling of Coal, a consolidated four-part practice that provides methods and requirements for obtaining representative mechanical samples of coal for analysis and contractual/quality evaluation.

Q: What does it cover?

A: It covers mechanical sampling system design/operation, inspection and documentation, sample handling and preparation references, and statistical procedures for bias testing of samplers and systems. The practice is intended for conveyed and stored coal sampling situations and gives guidance on system acceptance and evaluation.

Q: Who typically uses it?

A: Coal producers, utilities, terminals, purchasers, QA/QC laboratories, equipment manufacturers, and engineers involved in coal sampling, testing, and contractual verification.

Q: Is it current or superseded?

A: The D7430/D7430M-22 edition (2022) is the current active consolidated edition of this practice; it supersedes earlier individual practices that it incorporates. Users should verify the latest status directly with ASTM for any amendments or revisions after 2022.

Q: Is it part of a series?

A: Yes — D7430/D7430M is a consolidated multi-part practice that replaces and incorporates several earlier ASTM practices (D7256/D7256M, D4916, D4702, D6518). It also cross-references sample preparation Practice D2013/D2013M and other related ASTM test and practice documents used in fuel analysis.

Q: What are the key keywords?

A: Mechanical sampling, coal, sampler bias, sample preparation, statistical evaluation, QA/QC, sampling system inspection.