astme18（AstmE186英文全称）

综合资讯 2023-06-21T11:14:37

ASTM E186: Standard Reference Radiographs for Heavy-Walled (2 to 4 1/2-in. [50.8 to 114-mm]) Steel Castings

Introduction

ASTM E186, or Standard Reference Radiographs for Heavy-Walled (2 to 4 1/2-in. [50.8 to 114-mm]) Steel Castings, is a standard created by ASTM International for the industry of heavy-walled steel casting manufacturing. This standard provides the necessary framework for the evaluation and selection of radiographic film quality and equipment for defect detection in steel castings of up to 4 1/2 inches in thickness. The reference radiographs included in this standard are a valuable tool for the interpretation of radiographs and the detection of surface and internal defects within the castings.

Details

Reference Radiographs

The ASTM E186 standard contains reference radiographs, which are used as a benchmark for the examination of the steel castings. The radiographs included in this standard represent various types, shapes, and sizes of defects that may occur in the castings. The reference radiographs set forth in this standard provide visual criteria for the acceptance or rejection of the steel castings under scrutiny. These radiographs are also used to develop and validate radiographic techniques for the detection of defects in the castings. This ensures that the quality of radiographic inspection is standardised throughout the industry.

Radiographic Inspection Procedures

This standard provides guidelines for the radiographic inspection procedures of heavy-walled steel castings. These guidelines cover the radiation source, film sizes, processing techniques, and other equipment that must be used for effective radiographic inspection of steel castings. Proper selection and utilisation of equipment and film reduce the likelihood of missing important defects and provide reliable, repeatable results.

Quality Control

ASTM E186 establishes a standard modelling system to ensure that quality control personnel can perform a comprehensive, objective analysis of the inspection process. The standard reference radiographs, when used correctly, can provide assistance in the review or comparison of radiographs to identify, classify, and report significant observed discontinuities. This standard ensures that inspection data is reliable and can be used for further product development and research.

Application

ASTM E186 is essential in ensuring the quality and consistency of radiographic inspections of heavy-walled steel castings. The guidelines, procedures, and reference radiographs in this standard ensure that inspection techniques and equipment are standardized throughout the industry. The radiographs and procedures allow accurate detection and assessment of defects, making certain that only quality castings are sent to consumers. As a result, the standard enhances user confidence in heavy-walled steel castings and reduces potential for accidents and incidents.

Conclusion

ASTM E186 standard is a reliable reference for the heavy-walled steel casting industry, providing a standardised framework for the selection of proper equipment, inspection procedures, and quality control measures. The standard reference radiographs within the standard serve as visual guidelines for quality control personnel in the detection and characterisation of casting defects. This standard continues to improve the industry's radiographic inspection processes and increase user confidence in heavy-walled steel castings.