In 【Ethylene Cracking】, are the primary quenchers of the ethylene and ethane-based ethylene cracking units at CNPC’s Tarim and Changqing facilities domestic-made?

Ask the people in the Global Procurement Department; it’s likely that the product from Tarim is imported, while that from Changqing is domestically produced.

Both Global and SEI are each responsible for their own pyrolysis processes

A pyrolysis furnace requires a specialized process package; SEI likely chose Sinopec’s own CBL furnace, while Huanyu probably purchased a foreign process package. However, the selection of the quencher has nothing to do with whether it is imported or not.

【Ethylene cracking】Summary post on discussion topics related to cracking furnace equipment components: https://bbs.hcbbs.com/thread-3308724-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum)

Jiangnan Boilers has developed specialized tooling and processing procedures for the welding pretreatment of the inner tubes in quenching heat exchangers, which **improves production efficiency while ensuring quality. Through the modification and development of welding equipment, visual and automated welding technologies have been introduced and applied, enabling full visibility and control over the welding process at key stages; as a result, the welds have an attractive appearance and all inspections pass on the first attempt； For special materials prone to welding cracks, the company employs specialized welding techniques to ensure that all inspections after welding are successful from the first attempt ； Furthermore, to prevent deformation during heat treatment, a custom-designed process is employed to ensure effective control throughout the entire heat treatment process. Through innovations in processes and tooling, the company successfully developed quench heat exchangers, further expanding the range of heat exchanger products with special designs. It is understood that Jiangnan Boilers has currently delivered multiple sets of quench heat exchangers to the ethylene plants of CNPC Lanzhou Petrochemical, CNPC Jilin Petrochemical, and Sinopec Zhenhai Refining & Chemical Co., Ltd.; the plants equipped with these exchangers are operating stably and with reliable performance.