ASTM D2624-24 PDF

Full title and description

Standard Test Methods for Electrical Conductivity of Aviation and Distillate Fuels — procedures and field methods for measuring the electrical conductivity (rest conductivity) of aviation and distillate fuels, with and without static-dissipating additives, using portable, on-line/side-stream, and in-line meters.

Abstract

This standard (D2624-24) specifies test methods to determine the electrical conductivity of aviation and distillate fuels. It describes measurement principles, instrument types (portable, on‑line/side‑stream, and in‑line), sampling and relaxation techniques to avoid residual charge errors, units (SI), and precautionary guidance related to safe measurement and handling. The results are used to assess a fuel’s ability to dissipate electrostatic charge during pumping and transfer operations.

General information

• Status: Active.
• Publication date: November 1, 2024 (designation D2624-24).
• Publisher: ASTM International.
• ICS / categories: 75.160.20 (Liquid fuels; petroleum products).
• Edition / version: D2624-24.
• Number of pages: 12.

Scope

The standard covers determination of electrical conductivity of aviation and distillate fuels with and without static dissipator additives. It provides three practical measurement approaches for field and pipeline use (portable meters, on‑line/side‑stream sampling meters, and in‑line continuous meters), guidance on allowing relaxation of residual charges before measurement, and notes SI units as the standard reporting units. It does not address all safety concerns; users must apply appropriate safety and regulatory practices.

Key topics and requirements

• Definition of rest conductivity and significance for fuel handling safety.
• Three measurement methods: portable meters (tank/sample), on‑line/side‑stream meters, and in‑line continuous meters.
• Sampling and measurement procedure requirements, including relaxation of residual electrical charge and contamination avoidance.
• Instrument calibration and field‑use considerations for accurate, repeatable readings (including recommended units: picosiemens per meter in SI terminology).
• Guidance on use with static dissipator additives and interpretation of measured conductivity for operational decisions.
• Safety and limitations: the standard notes it does not cover all safety aspects and the user is responsible for local regulatory compliance and safe practices.

Typical use and users

Used by refinery and production laboratories, fuel quality/control teams, pipeline and terminal operators, airport fuel handlers and fuel farms, instrument manufacturers and calibrators, consultants, and regulatory bodies. The methods support on-site checks, pipeline monitoring, and specification verification to reduce electrostatic hazards during fuel transfer and storage.

Related standards

Commonly referenced and related documents include ASTM specifications and guides for fuels and static control, for example ASTM D1655 (Aviation Turbine Fuels), ASTM D975 (Diesel Fuel Oils), and ASTM D4865 (Guide for Generation and Dissipation of Static Electricity in Petroleum Fuel Systems), plus other D02 committee test methods and practices governing sampling, contamination control, and instrument calibration.

Keywords

electrical conductivity, rest conductivity, aviation fuel, distillate fuel, static dissipator additive, portable conductivity meter, in-line meter, on-line sampling, picosiemens per meter, fuel handling, electrostatic charge.

FAQ

Q: What is this standard?

A: ASTM D2624-24 is a set of test methods for measuring the electrical conductivity of aviation and distillate fuels to assess their ability to dissipate electrostatic charge and to inform safe fuel handling and transfer practices.

Q: What does it cover?

A: It covers procedures for three measurement approaches — portable meters, on‑line/side‑stream meters, and in‑line continuous meters — sampling and measurement precautions (including relaxation of residual charges), reporting in SI units, and guidance on use with static dissipator additives. It does not replace site‑specific safety rules.

Q: Who typically uses it?

A: Fuel laboratories, refineries, terminals, pipeline operators, airport fuel handlers, instrument manufacturers, and regulatory or inspection bodies responsible for ensuring safe fuel transfer and storage.

Q: Is it current or superseded?

A: The D2624-24 edition is the current active version (designation ending -24). Users should verify at the time of purchase or use that no subsequent revision has been published.

Q: Is it part of a series?

A: It is maintained under ASTM Committee D02 (Petroleum Products, Liquid Fuels, and Lubricants) and is published in the Book of Standards volumes covering petroleum products; it is typically used alongside related ASTM specifications and guides (for example D1655, D975, D4865) for fuel quality and static control practices.

Q: What are the key keywords?

A: Electrical conductivity, rest conductivity, aviation fuels, distillate fuels, static dissipator, portable meter, in-line meter, picosiemens per meter, fuel sampling, electrostatic dissipation.