Application of the emergency repair method in leak point of products pipeline

The main emergency repair methods for the leak point of products pipeline caused by oil stealing include mechanical clamp, plate type, blocking cap, and plugging tees etc. The emergency repair methods of mechanical clamp and plate type are both suitable for the case that "oil-stolen clips" is easy removed. When the former method is used, If the manufacture precision of clamp or the working environment does not meet the conditions, then that will be easily lead to the problem of secondary leakage. But in the latter method, the simple plugging plate is used to displace the clamp. The plugging plate is pressed rapidly by using the chain fastening devices, which solves the problem in welded clamp with high safety and reliability. The blocking cap method is suitable for the cases that the "oil-stolen clips" welded with pipe is strong, not or mild leaking oil. The basic principle of non-drainage and drainage which are used in the blocking cap method is described in detail. The plugging tees method can also be used in order to improve the effectiveness, long-term, security of emergency repair. These methods are applied in the Fushun Yanwu-Yingkou Bayuquan Products Pipeline and have achieved some results. The repair methods should be selected according to the result of multi-factors weighted comprehensive assessment based on the specific conditions in the field, these factors include safety and reliability, repair costs, the impact of pipeline operation, repair life, etc. and repair work is carried out in accordance with relevant standards.