Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D4421-94(1999)
• Năm ban hành / Publication date: 1999
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for Volatile Matter in Petroleum Coke (Withdrawn 2004)
• Số trang / Page: 4
• Phạm vi áp dụng / Scope of standard: 1.1 This test method determines the volatile matter produced by pyrolysis or evolved when petroleum coke, or both, is subjected to the specific conditions of the test. Samples having a thermal history above 600°C are excluded. 1.2 This test method is empirical and requires the entire test procedure to be closely followed to ensure results from different laboratories to be comparable. 1.3 This test method is not satisfactory for dedusting material content. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8.