In the coal chemical by-product deep processing and comprehensive utilization project of Shenhua Ningxia Coal Industry Group Co., Ltd., our company successfully undertook and implemented chemical cleaning projects such as the fourth section pipeline and equipment of the main unit of China National Nuclear Industry 23 Construction Co., Ltd., the cracking furnace and pipeline of the cracking unit of Sinopec Tenth Construction Co., Ltd., the storage tanks and some pipelines of the butadiene tank area of Sinopec First Construction Co., Ltd., the equipment and pipelines of the butadiene extraction unit in the second section of the main unit of Sinopec Sixth Construction Co., Ltd., and the P91 pipeline and high-pressure pipeline of Sinopec Fourth Construction Co., Ltd.