Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM E280-98(2004)e1
• Năm ban hành / Publication date: 2004
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Reference Radiographs for Heavy-Walled (4 1/2 to 12-in - [114 to 305-mm]) Steel Castings
• Số trang / Page: 3
• Phạm vi áp dụng / Scope of standard: 1.1 These reference radiographs for heavy-walled steel castings are applicable to nominal section thicknesses; of 4 1/2 to 12 in. [114 to 305 mm] and consists of two sets as follows: 1.1.1 2-MV X rays and Cobalt-60This; includes cobalt-60 or equivalent isotope radiation and from 2 MV up to 4 MV X rays. Set of 28 plates in 81/2 by; 11 in. [216 by 279 mm] ring binders.1.1.2 4-MV to 30-MV X rays.1.1.3 Each set consists of three; categories of graded discontinuities in increasing severity levels, and three categories of ungraded; discontinuities furnished as examples only, as follows:1.1.3.1 Category A-Gas porosity; severity levels 1; through 5.1.1.3.2 Category B-Sand and slag inclusions; severity levels 1 through 5.1.1.3.3. Category; C-Shrinkage; 3 types:Type 1 - Severity levels 1 through 5.Type 2 - ; Severity levels 1 through 5.Type 3 - Severity levels 1 through 5.1.1.3.4 Category D-; Crack; one illustration D5 in pre-1972 documents.1.1.3.5 Category E-Hot tear; one illustration D3 in; pre-1972 documents.1.1.3.6 Category F-Insert; one illustration EB2 in pre-1972 documents.1.2 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.