ASTM D6371-24 PDF

Full title and description

ASTM D6371-24 — Standard Test Method for Cold Filter Plugging Point (CFPP) of Diesel and Heating Fuels. This test method specifies manual and automated procedures to determine the lowest temperature at which a distillate fuel will pass through a specified filter under controlled conditions, used to estimate low-temperature operability of diesel and domestic heating fuels.

Abstract

This standard describes procedures to measure the Cold Filter Plugging Point (CFPP) of distillate fuels, using either manual or automated apparatus. The CFPP is an empirical test used to estimate the lowest temperature at which fuel will flow without filter plugging in certain fuel systems; the method is applicable to fuels with or without flow‑improving additives. The test reports temperature in SI units and includes provisions for sample conditioning and optional heat treatment to investigate performance differences.

General information

• Status: Active.
• Publication date: 2024 (ASTM designation D6371-24; listed publication date 01/03/2024).
• Publisher: ASTM International.
• ICS / categories: Liquid fuels — ICS 75.160.20.
• Edition / version: D6371-24 (current edition).
• Number of pages: 10 pages (typical published length for the 2024 edition).

Scope

The scope covers determination of the cold filter plugging point (CFPP) temperature of diesel and domestic heating fuels using either manual or automated apparatus. It applies to distillate fuels, including those containing flow‑improving or other additives, and is intended for use where CFPP gives a suitable estimate of the lowest temperature for trouble‑free flow in certain fuel systems. The method is noted as technically equivalent to IP 309 and EN 116 and includes safety warnings (for example, about mercury) and requirements to report results in SI units.

Key topics and requirements

• Definition and significance of CFPP as an indicator of low‑temperature filterability of diesel and heating fuels.
• Specified manual and automated apparatus configurations and calibration/standardization procedures.
• Sample preparation and conditioning, including optional heat treatment (45 °C for 30 min) to investigate performance differences.
• Test procedure steps for cooling, filtration checks, and determination/reporting of the CFPP temperature (SI units required).
• Reporting requirements and handling of additives; notes on equivalence with IP 309 and EN 116 and safety statements (mercury‑related warnings where applicable).

Typical use and users

Used by fuel testing laboratories, refineries, fuel distributors, engine and vehicle manufacturers, heating‑fuel suppliers, and regulatory/standards bodies to characterize low‑temperature performance of diesel and heating fuels, support specification compliance, investigate cold‑weather operability complaints, and evaluate additive effects on filterability.

Related standards

Technically equivalent or closely related methods include IP 309 and EN 116 (international equivalents for CFPP). Other referenced or related ASTM methods used for complementary cold‑properties testing include methods for cloud point and pour point (for example, ASTM D2500 for cloud point) and other fuel test procedures used in fuel characterization.

Keywords

Cold Filter Plugging Point, CFPP, diesel fuel, heating fuel, filterability, automated CFPP, manual CFPP, low‑temperature operability, fuel additives, distillate fuels.

FAQ

Q: What is this standard?

A: ASTM D6371-24 is the ASTM International test method for determining the Cold Filter Plugging Point (CFPP) of diesel and domestic heating fuels, using manual or automated apparatus to estimate the lowest temperature at which fuel will pass a specified filter under test conditions.

Q: What does it cover?

A: It covers apparatus, sample preparation, cooling and filtration procedures, calibration/standardization of equipment, optional heat treatment for diagnostic testing, and reporting requirements; results are reported in SI units.

Q: Who typically uses it?

A: Fuel test laboratories, fuel producers and distributors, vehicle and engine manufacturers, heating‑fuel suppliers, and regulatory agencies are the primary users for specification compliance, quality control, and cold‑weather troubleshooting.

Q: Is it current or superseded?

A: The D6371-24 edition is the current ASTM edition (designated -24) and is listed as active; the 2024 edition is the latest published revision of this test method.

Q: Is it part of a series?

A: D6371 is part of ASTM’s suite of distillate fuel cold‑property test methods and sits alongside related ASTM methods for cloud point, pour point, and other fuel characterization procedures; it is also frequently cross‑referenced with IP and EN methods for CFPP.

Q: What are the key keywords?

A: CFPP, cold filter plugging point, diesel, heating fuels, filterability, automated apparatus, manual apparatus, low‑temperature performance.