Hence, if the gland flange is eradicated to exchange the graphite packing rings, the stem is still held securely, because of the stem housing. It is effective at passing a fireplace examination with specified limits on leakage for the environment and downstream right after becoming closed subsequent to fire publicity. https://a19517.wikigop.com/1332295/examine_this_report_on_pipe_flanges_and_fittings