Definition - What does Manway mean?
A Manway is an entry used by workers to provide easy access to vessels or storage tanks for the cleaning and maintenance purposes. It is always present on the intake air-side in gassy mines. These openings provide a passage for the workers into the tanks or other kinds of vessels. They have plates or covers which fit inside the opening of the vessel or tank and are pulled back against the gasket or the external flange. The round covers do not fit inside the opening as it must be larger in diameter than the opening so as to serve its operation. The gaskets for these flanges are generally ob-round or oval in shape so that covers can be fitted through the openings.