Astm Temperature Standards

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Rosangela Pinkard

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Aug 5, 2024, 2:07:12 AM8/5/24

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ASTMs temperature measurement standards provide the material and property specifications, as well as guides for the testing, calibration, and use of laboratory, industrial, and clinical instruments used in the determination of thermal variables, particularly temperature. These include thermoelement materials, hydrometers, liquid-in-glass thermometers, thermocouples, resistance thermometers, and thermistor sensors. These instruments quantify thermal parameters by measuring some physical property of a working material that varies with temperature. They are then calibrated either by comparing their results with that of certified thermometers, or by checking them against known fixed points on the temperature scale. These temperature measurement standards are useful to medical and industrial supplies manufacturers, laboratories, and other producers and users of such thermal instruments in helping them fabricate quality equipments towards their safe and accurate utilisation.

E1652-21 Standard Specification for Magnesium Oxide and Aluminum Oxide Powder and Crushable Insulators Used in the Manufacture of Base Metal Thermocouples, Metal-Sheathed Platinum Resistance Thermometers, and Noble Metal Thermocouples

ASTM Committee E20 on Temperature Measurement was formed in 1962. The Committee meets twice a year, at the May and November Committee Weeks, with about 40 members attending 2 days of technical meetings. The Committee, with a current membership of 138, has jurisdiction over 45 standards, published in the Annual Book of ASTM Standards, Volume 14.03. E20 has 6 technical subcommittees that maintain jurisdiction over these standards. Information on this subcommittee structure and E20's portfolio of approved standards and Work Items under development are available from the List of Subcommittees and Standards. These standards have and continue to play a preeminent role in all aspects of temperature measurement.

The temp most people quote is either 170*F or 175*F max container surface temp of a burning container. There is no mention of container material. Not sure where this number came from, but I think it might actually be very wrong.

Also worth noting is the standard minimum flammability test for the container. It must withstand 3 full minutes exposed to a flame without showing any sign of it being about to catch fire. Similar flammability tests for tea light cups are earlier in the document.

I'm an utter noob to candle making, and have been wondering about the ASTM standards. I was actually surprised to find that this set of safety standards we're encouraged (by the courts!) to abide by in order to CYA in case of litigation are... secret???... behind a pay wall??? WTF? I don't understand this at all. Why are the safety standards of the industry hidden from those who need to know and follow them? Am I just naive...?

I was confused by your price quote of $716-$1567, TallTayl. To buy ASTM F2417-17 from the ASTM site itself was $54. This obviously did not include any updates done subsequent to 2017. What is included in the very expensive document you referenced?

Sorry I don't have any input for you guys, but thank you for starting this thread.

I did end up buying the ASTM F2417-17 Fire Safety for Candles. There is nothing about container surface temperatures. I'm so disappointed. I spent the $57 for peace of mind and to cover myself. It provides no guidelines on this subject. No 140 no 170 no 175. I don't know where other people get these figures from but it is not from that document. So if you are considering buying it to get that official guideline don't bother. All the other information contained I have read here or other candle blogs. Big waste of money

I bought it too. Worth the $ to me though for testing. If something goes wrong with a candle in the wild, at least I can prove I test correctly and that I chose proper containers! Not combustible materials of any sort. And I know how to test tea light holders. Lots of good info in there.

Where I do see temps to consider is the UL testing documents I have posted about before. 125*f for metal and 150-145* for glass or ceramic depending on the test version used. Google around for those PDF results.

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Test Procedure: A specimen is placed inside a vertical tube in a hot-air ignition furnace. A technician watches for the occurrence of flaming or glowing combustion, flash, explosion, a rapid rise in temperature, or the end of a 10-minute period, whichever comes first. Depending on whether or not ignition has occurred, the temperature is lowered or raised, and the test is repeated with a fresh specimen. This process is repeated until a Self-Ignition Temperature (SIT) or Flash Ignition Temperature (FIT) has been determined.

Self-Ignition Temperature (SIT) is the minimum temperature at which the self-heating properties of the specimen lead to ignition or ignition occurs of itself, under test conditions, in the absence of any additional flame ignition source. Flash Ignition Temperature (FIT) is the minimum temperature at which, under specified test conditions, sufficient flammable gases are emitted to ignite momentarily upon application of a small external pilot flame.

The series of ASTM D6400 is a four-part biodegradation test for evaluating biodegradability that includes elemental analysis, plant germination (phytotoxicity), and mesh filtration of the resulting particles.

The ASTM D6400 test method uses a set of conditions that favor microorganisms that thrive above 50 degrees centigrade, making the test method somewhat selective for bacterial based biodegradation. This component of the test method does favor bioplastic types of materials, and may not provide for testing parity when comparing the ASTM D6400 to other test methods such as the ISO 16929. In addition, the method is not meant to represent composting conditions in a home compost facility, as the composting temperature requirements are not likely to be achieved in a home facility over an extended period of time.

ASTM D6400 has been harmonized with other industry standards such as ISO 14855. Customers needing only the biodegradation testing and not the full range of compost analysis have been requesting ASTM D5338 for Aerobic Biodegradation.

Environmental conditioning tests per ASTM D4332 are designed to evaluate standard and special conditioning environments that can be used to simulate the field conditions that a package or container may be exposed to during shipment or storage. Additionally, the standard is used to pre-condition packages to predefined conditions before distribution testing is performed.

The selected conditions for ASTM D4332 testing may be based on a historic standard or a known distribution environment. By simulating these environmental conditions, we can more accurately represent how the product and package will withstand the shipping process as well as how future performance may be affected. With environmental conditioning test results, manufacturers can accurately represent conditions that their products and packages should be able to withstand.

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