دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: in an orifice meter installation, the threaded hole into which is screwed a small pipe to connect the orifice fitting to the flow recorder. Two taps are usually employed: the upstream tap centre is located two and one-half times the published inside pipe diameter upstream of the nearest plate face;the downstream tap centre is located eight times the published inside pipe diameter downstream of the nearest plate face. See orifice-flange tap, orifice meter.