Why do all valves and components of coke oven gas not contain copper or copper alloys? Is this reasonable?

Coke oven gas contains components such as hydrogen sulfide and ammonia. The absence of copper here generally refers to the parts in contact with the medium.

The reason why all valves and components in the coke oven gas project are free of copper and copper alloys may be that coke oven gas is highly heated and corrosive, and copper and copper alloys are prone to corrosion and ablation in such high-temperature and corrosive environments. Therefore, using other materials such as stainless steel and steel can better ensure the high-temperature and corrosion resistance of valves and components. From this perspective, it is reasonable for all valves and components in the coke oven gas project to be free of copper and copper alloys. This approach can improve the stability and service life of the equipment, reduce the frequency of maintenance and replacement, and thereby lower the costs and risks associated with the project. However, whether it is reasonable or not still needs to be determined based on the actual circumstances. If, under certain conditions, copper and its alloys exhibit better corrosion resistance than other materials, or if the cost of those other materials is higher, it may be more reasonable to use copper and its alloys. Therefore, in specific projects, a comprehensive evaluation is required based on factors such as the properties of the gas, process requirements, and material costs. .