As an important part of petroleum machinery equipment, the quality of petroleum machinery castings directly affects the performance and service life of the entire petroleum equipment. Therefore, it is very necessary to carry out strict inspection and evaluation on petroleum machinery castings. This paper will discuss the inspection technology and evaluation standard of petroleum machinery castings, in order to provide reference for improving the quality of petroleum machinery castings.
Inspection technology of petroleum machinery castings
Appearance detection: Appearance detection is the detection of surface defects of petroleum machinery castings, such as cracks, pores, shrinkage holes, inclusions, etc. Carefully observe the surface of the casting by sight or with a magnifying glass to ensure that the casting surface is free of defects.
Size detection: Size detection is to detect the accuracy of the size of each part of the petroleum machinery castings. Each part of the casting is measured by measuring tools to ensure that its size meets the design requirements.
Chemical composition testing: Chemical composition testing is to detect the content of chemical elements in petroleum machinery castings to determine whether they meet the relevant standards. The chemical composition of castings was determined by means of spectral analysis and chemical analysis.
Metallographic detection: Metallographic detection is the detection of the internal organizational structure of petroleum machinery castings. The internal structure of the casting is observed by metallographic microscope to determine whether the grain size and inclusions meet the requirements.
Mechanical properties testing: Mechanical properties testing is to test the performance of petroleum machinery castings under external force, including hardness, tensile strength, impact toughness, etc. The castings are tested by mechanical testing machines to evaluate their performance in actual use.
Evaluation criteria for petroleum machinery castings
Quality stability: Petroleum machinery castings should have excellent quality stability to ensure the consistency of each batch of products in mass production. The evaluation criteria include the volatility of product quality, traceability, etc.
Performance reliability: Petroleum machinery castings should have sufficient performance reliability to operate stably in harsh oil mining environments. Evaluation criteria include service life, corrosion resistance, wear resistance, etc.
Safety: Petroleum machinery castings should meet the relevant safety standards to ensure that they will not cause harm to operators and equipment during use. Evaluation criteria include harmless material limit, explosion-proof grade, etc.
Economy: Petroleum machinery castings should have a reasonable economy, that is, meet the requirements of use at the same time, reasonable price, reduce costs. Evaluation criteria include cost performance, maintenance cost, etc.
Environmental protection: Petroleum machinery castings should meet environmental protection requirements and reduce pollution to the environment. Evaluation criteria include material recyclability, energy consumption and so on.
The inspection technology and evaluation standard of petroleum machinery castings are important links to ensure product quality. Through the inspection of the appearance, size, chemical composition, metallographic structure and mechanical properties of petroleum machinery castings, as well as the evaluation of quality stability, performance reliability, safety, economy and environmental protection, the quality and performance of petroleum machinery castings can be effectively improved, providing a strong guarantee for the safe and stable operation of petroleum machinery equipment. At the same time, constantly updating and improving testing technology and evaluation standards will help to improve the overall level of China’s petroleum machinery industry and promote sustainable development.
