ASTM D6801-07(R2021) pdf free download
ASTM D6801-07(R2021) pdf free download.Standard Test Method for Measuring Maximum Spontaneous Heating Temperature of Art and Other Materials
1. Scope
1.1 This test method covers a small-scale laboratory proce- dure to determine the self heating tendency of oil-based materials by exposure to elevated temperatures in air in a controlled semi-adiabatic system. 1.2 This test method has been developed to address an urgent need to identify oil-based materials that may require labeling for spontaneous heating tendency. Studies based on this test method may allow the development of a practice to identify such oil-based materials. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 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 appro- priate safety, health, and environmental practices and deter- mine the applicability of regulatory limitations prior to use. For safety concerns specific to disposal of solvent-soaked rags, see Appendix X1. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions: 3.1.1 maximum spontaneous heating temperature, n—maximum temperature reached during spontaneous heating under the specified test conditions. 3.1.2 oil-based materials, n—seed and nut oils or materials that contain such oils. 3.1.3 spontaneous heating, n—exothermic reaction of a material due to slow or incomplete reaction that results in a temperature rise above that of its surroundings (see Test Method E771); also called selfheating. 3.2 Symbols: 3.2.1 T D —difference between maximum spontaneous heat- ing temperature and control temperature. 3.2.2 T S —maximum spontaneous heating temperature. 3.2.3 T C —control temperature or maximum spontaneous temperature measured over 1 h immediately preceding the beginning of an experiment.
4. Summary of Test Method
4.1 A non-woven paper cloth is covered uniformly in 9.0 mL of test material mixed with 0.25 mL of 6 to 10 % manganese drier. This covered pad is then put in a small stainless steel holder with air holes in the sides. This holder is placed in a larger chamber, which is opened to the air from the top and heated until peak temperature is reached. The maxi- mum spontaneous heating temperature inside the soaked paper cloth is recorded with a K thermocouple and maximum temperature recorder with the base temperature adjusted to 70 6 2°C.
5. Significance and Use
5.1 This test method provides a means of accelerating the tendency of a material toward spontaneous heating that may eventually lead to a fire. It is applicable to liquids and pastes.5.2 The spontaneous heating behavior of an oil-based ma- terial is affected by such factors as the availability of oxygen, the amount of driers present, the degree of polymerization of oils, the surface area of the cellulose material, measures to prevent heat dissipation, and the amount of oil in contact with cellulose material. The degree of spontaneous heating bears little relationship to the type of cellulose material to which an oil-based material comes in contact or whether or not oil soaked materials are first air dried. Small amounts of contaminants, such as oil paint, quartz dust, dirt or drier (for example, materials that might be found on a dirty, oil-soaked rag), can act as catalysts for this reaction.
6. Apparatus
6.1 Constant Temperature Water Bath—set so that the base internal temperature of the test materials is 70 6 2°C, see 1. 6.2 K Thermocouple, as described in Guide E633. 6.3 Maximum Temperature Recorder, which records maxi- mum spontaneous heating temperature during a specified interval and is accurate to at least 60.3°C and calibrated against NIST traceable standards. 6.4 Stainless Steel Chamber for Water Bath—See Fig. 1 for dimensions.
