Gas pipeline flame arrester convenient to clean

The utility model relates to the technical field of gas flame arresters, in particular to a gas pipeline flame arrester convenient to clean, which comprises an upstream shell, a downstream shell, a filter screen and a valve, the upstream shell and the downstream shell are oppositely arranged and fixed, the filter screen is arranged in the middle of an inner cavity opposite to the upstream shell and the downstream shell, and the valve is arranged in the inner cavity. A sewage draining exit and a sewage draining valve are arranged on the lower side of the upstream shell, and a cleaning opening and a three-way valve are arranged on the upper side of the downstream shell; an inlet valve is arranged at the front end of the upstream shell, and an outlet valve is arranged at the tail end of the downstream shell. The pipeline flame arrester is reasonable in design, simple in structure and easy to manufacture, and whether the pipeline flame arrester is cleaned or not is judged according to upstream and downstream pres