The "21" in the designation indicates that the most recent major revision was approved in . You can view or purchase the official document at the ASTM International website or through authorized distributors like the ANSI Webstore and Accuris Standards Store . Core Significance and Purpose
Wait, let me check. The ASTM standards have a specific nomenclature. Each standard has a designation, like D618-21, where D is the section, 618 is the standard number, and 21 is the year of publication. So maybe the user is referring to ASTM D618-21. The hyphen is important because in the format Designation: D618-21, the hyphen separates the standard number from the year. The user might have omitted the hyphen and written it as D61821. That makes sense. So the correct designation would be ASTM D618-21.
The time interval during which a specimen is exposed to the conditioning atmosphere. Standard Conditioning Procedures Procedure A (Standard): Conditioning at relative humidity for not less than 40 hours. Procedure B (Dry): Conditioning at for 48 hours, followed by cooling in a desiccator. Procedure C (Humid): Conditioning at relative humidity at for 96 hours. astm d61821 pdf
The significance of ASTM D6182-1 lies in its ability to provide a rapid and reliable method for assessing the toxicity of chemicals. The standard has numerous applications in various fields, including environmental monitoring, risk assessment, and regulatory compliance.
: Used to predict polymer performance under severe tropical or humid field conditions. The "21" in the designation indicates that the
I need to present this in an engaging way, maybe by using examples or analogies to explain why conditioning is crucial. Also, make it clear that while the PDF might not be free, the standard's principles are foundational in the plastics industry. Also, perhaps mention that ASTM is a reputable source and why it's important to refer to official documents for accurate information.
before testing to evaluate how moisture affects finish adhesion. Assessment The ASTM standards have a specific nomenclature
In the context of plastics testing, conditioning refers to exposing a material to a specific environment (temperature and relative humidity) for a set period before it is tested. The physical and electrical properties of many plastics are significantly influenced by temperature and humidity, which can drastically alter test results. Without a standardized conditioning process, comparing the strength, flexibility, or electrical resistance of two different batches of plastic would be like comparing apples to oranges.
: For monitoring the condition of oils in transformers, circuit breakers, and other electrical equipment.
