ASTM D6371 for cold filter plugging point of diesel and heating fuels
1. Scope
1.1 This test method covers the determination of the cold filter plugging point (CFPP) temperature of diesel and domestic heating fuels using either manual or automated apparatus.

NOTE 1 - This test method is technically equivalent to test methods IP 309 and EN 116.

1.2 The manual apparatus and automated apparatus are both suitable for referee purposes.

1.3 This test method is applicable to distillate fuels, including those containing a flow-improving or other additive, intended for use in diesel engines and domestic heating installations.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7.

2. Referenced Documents
2.1 ASTM Standards:
D2500 Test Method for Cloud Point of Petroleum Oils
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D5771 Test Method for Cloud Point of Petroleum Products (Optical Detection Stepped Cooling Method)
D5772 Test Method for Cloud Point of Petroleum Products (Linear Cooling Rate Method)
D5773 Test Method for Cloud Point of Petroleum Products (Constant Cooling Rate Method)
E1 Specification for ASTM Thermometers

2.2 IP Standards:
IP 309 Diesel and domestic heating fuels - Determination of cold filter plugging point
Specifications for IP Standard Thermometers

2.3 ISO Standards:
IP 3310 Test sieves - Technical requirements and testing - Part 1: Metal cloth

2.4 European Standards:
EN 116 Diesel and domestic heating fuels - Determination of cold filter plugging point

3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 cold filter plugging point, n - highest temperature, expressed in multiples of 1°C, at which a given volume of fuel fails to pass through a standardized filtration device in a specified time when cooled under the conditions prescribed in this test method.

3.1.2 certified reference material, n - a stable petroleum product with a method-specific nominal CFPP value established by a method-specific interlaboratory study following RR:D02-1007 guidelines or ISO Guides 34 and 35.