ASTM D56-22 rus PDF

Full title and description

ASTM D56-22 — Standard Test Method for Flash Point by Tag Closed Cup Tester. This standard specifies the manual and automated Tag closed-cup procedures for determining the flash point of low-viscosity liquids and provides requirements and test conditions for use in safety classification, quality control, and contamination detection in petroleum and related products.

Abstract

This test method defines procedures to determine the flash point of liquids having relatively low viscosity and flash points below about 93 °C (200 °F) using the Tag closed-cup tester. The standard explains significance and use of flash point data (safety, shipping, and detection of contamination), identifies two test condition ranges (low‑temperature and high‑temperature), and includes safety notes (including warnings about mercury).

General information

• Status: Active / Current.
• Publication date: 1 July 2022 (current edition designated D56-22; approved Dec. 1, 2021; published July 1, 2022).
• Publisher: ASTM International (ASTM D02 Committee on Petroleum Products, Liquid Fuels, and Lubricants; Subcommittee D02.08 on Volatility).
• ICS / categories: 75.080 (Petroleum products in general); 87.040 (Paints and varnishes).
• Edition / version: D56-22 (current edition replacing prior D56-21a series).
• Number of pages: 13 pages.

Scope

The standard covers determination of flash point by Tag manual and automated closed testers of liquids with viscosity below 5.5 mm2/s (cSt) at 40 °C or below 9.5 mm2/s (cSt) at 25 °C and for expected flash points below about 93 °C (200 °F). Two test condition ranges are defined (low temperature for expected flash points < 60 °C and high temperature for expected flash points ≥ 60 °C). Guidance is given on when other closed‑cup methods (for example D93) are more appropriate (higher viscosity, surface films, suspended solids, or flash point ≥ 93 °C). The method is intended for laboratory measurement and for use in regulations and classification but is not by itself a full fire‑hazard appraisal.

Key topics and requirements

• Definition and significance of flash point as a measure of tendency to form a flammable mixture with air.
• Tag closed‑cup apparatus — manual and automated procedures and required instrumentation.
• Viscosity and temperature limits for applicability (≤ 5.5 mm2/s at 40 °C or ≤ 9.5 mm2/s at 25 °C; flash point < 93 °C).
• Two test condition ranges: low‑temperature (LT) and high‑temperature (HT) protocols.
• Criteria for selecting alternative methods (e.g., Pensky‑Martens D93) when sample properties fall outside Tag method limits.
• Safety and handling notes (including hazards related to mercury use in some equipment and general laboratory safety provisions).
• Use of results for regulatory classification (e.g., DOT/OSHA definitions) and contamination detection (e.g., gasoline in kerosene).

Typical use and users

Used by chemical and petroleum testing laboratories, quality control departments in fuel and lubricant production, paint and varnish manufacturers, shipping and regulatory bodies, and safety engineers to classify flammability, verify product specifications, check for contamination, and support regulatory compliance (transport, storage, workplace). Test houses and equipment manufacturers (Tag closed‑cup apparatus providers) also rely on this standard.

Related standards

Commonly referenced and related ASTM test methods include D93 (Pensky‑Martens closed cup), D1310 and D3143 (cut‑back asphalts), D3828, D3278, and D3941 (equilibrium closed‑cup methods). These documents are cited within D56 for guidance when sample properties fall outside the Tag method’s applicability.

Keywords

flash point; Tag closed cup; Tag tester; flammable liquids; combustible liquids; petroleum products; paints and varnishes; viscosity limits; safety classification; D56-22.

FAQ

Q: What is this standard?

A: ASTM D56-22 is the standardized laboratory test method that specifies how to determine the flash point of low‑viscosity liquids using the Tag closed‑cup tester.

Q: What does it cover?

A: It covers manual and automated Tag closed‑cup procedures for liquids with defined viscosity and temperature limits (flash point below ≈93 °C), defines LT and HT test conditions, and provides guidance for safety, interpretation, and when to use alternative methods.

Q: Who typically uses it?

A: Analytical and quality laboratories in the petroleum, lubricant, paint and varnish industries, regulatory and transport safety authorities, and product compliance teams.

Q: Is it current or superseded?

A: D56-22 is the current approved edition (designated D56‑22, published 1 July 2022) and it replaces earlier D56 editions (including the D56‑21a series). Users should verify whether any later revisions have been issued before relying on the text for regulatory compliance.

Q: Is it part of a series?

A: Yes — D56 is part of the ASTM D02 suite of volatility and flash‑point test methods and is cross‑referenced with other D02 test methods such as D93, D1310, D3143, D3941, D3278, and D3828.

Q: What are the key keywords?

A: Flash point, Tag closed cup, flammable, combustible, petroleum products, paints, viscosity, Tag tester, D56‑22.