The spraying normalizing device and process of the oil pipe with thick wall in ends are developed,rapid cooling at higher temperature and mild cooling at lower temperature is proposed.

Meanwhile, a new technology with riser heating and spray quenching process are suggested.

In order to improve the shock toughness of friction welding joint of oil drilling pipe,spray quenching is used as the measure of heat treatment after friction welding.

For studying spray-quenching process of large-scale forgings,spray-quenching equipment was developed,and experiments of spray quenching on shaft type parts were carried out.

Optical properties of ZnO and Mg_ xZn_(1- x)O nanoparticles prepared by flame spray synthesis;

Based on engineering examples the paper introduces some matters that need to be considered in the design of water spray fire extinguishing system,such as determination of design flow,selection and arrangement of spray head,arrangement of deluge valve block and laying of water spray pipeline,as well as operation and control of system and selection of water source and pumps,etc.