Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D4419-90(2021)
• Năm ban hành / Publication date: 2021
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for Measurement of Transition Temperatures of Petroleum Waxes by Differential Scanning Calorimetry (DSC)
• Chỉ số phân loại Quốc tế (ICS) / By field: 75.140 - Sáp, vật liệu bitum và các sản phẩm dầu mỏ khác
• Số trang / Page: 4
• Phạm vi áp dụng / Scope of standard: 1.1''This test method covers the transition temperatures of petroleum waxes, including microcrystalline waxes, by differential scanning calorimetry (DSC). These transitions may occur as a solid-solid transition or as a solid-liquid transition. 1.2''The normal operating temperature range extends from 15'''''C to 150'''''C (Note 1). 1.3''The values stated in SI units are to be regarded as the standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5''This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.