Can the semi-trailer connecting screw pipe joint be replaced by quick-release joint?

You can't. The semi-trailer connecting threaded pipe fittings are respectively connected to two gas pipe fittings on the semi-trailer, and the gas supply pipeline needs to be connected with the gas supply pipeline, which cannot be replaced by quick-release joints. Pipe joint is a hydraulic term, which is a part of hydraulic system to connect pipelines or install pipelines on hydraulic components. It is the general name of detachable connector in fluid channel.