Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM E1496-05
• Năm ban hành / Publication date: 2005
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for Neutron Radiographic Dimensional Measurements
• Chỉ số phân loại Quốc tế (ICS) / By field: 19.100 - Thử không phá hủy và thiết bị
• Số trang / Page: 4
• Phạm vi áp dụng / Scope of standard: 1.1 This test method provides a technique for extracting quantitative dimensional information on an object from its neutron radiograph. The technique is based on the identification of changes in film density caused by material changes where a corresponding discontinuity in film density exists. This test method is designed to be used with neutron radiographs made with a well-collimated beam. The film densities in the vicinity of the edge must be in the linear portion of the density versus exposure curve. The accuracy of this test method may be affected adversely in installations with high-angular-divergence neutron beams or with large object-to-film distances.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.