The petrochemical industry is an important pillar industry in China, providing the society with abundant energy and chemical products. Petrochemical equipment is characterized by high temperature, high pressure and high corrosion. Through the inspection of equipment, production safety and operational efficiency of units can be guaranteed. Digital delivery builds an information organization centered on equipment tag numbers. Through the digital delivery platform, it associates data, documents, and 3D model information related to the equipment, enabling convenient query and browsing of equipment information. By establishing an interface between the digital delivery platform and the equipment inspection and maintenance system, not only can the rapid query of reference data be achieved, but also the three-dimensional visualization management of inspection can be realized, thereby enhancing the operation and maintenance efficiency of enterprises. This article systematically elaborates on the application path and technical implementation methods of digital delivery in equipment inspection and maintenance from aspects such as equipment classification configuration, engineering data information interaction, engineering documentation information interaction, and 3D model information interaction, providing theoretical reference and practical guidance for petrochemical enterprises to promote digital transformation.