Pipe assembly unit with built-in flow sensors

A pipe assembly unit with built-in flow sensors in which a pipe assembly of manifold construction is integrally formed with a main pipe and multiple branch pipes, the main pipe having an opening with a square flange at each end thereof and the multiple branch pipes branching from the periphery of the main pipe, the square flange having a bolt-joint hole at each square corner thereof, and each of the multiple branch pipes being provided with a flow sensor which detects the flow rate of a fluid flowing therethrough,

• the pipe assembly unit further provides with a pipe adapter which is detachably attached face to face to the square flange of the main pipe, the pipe adapter comprising a female threaded portion to communicate with the main pipe, an adapter square flange around the female threaded portion, the adapter square flange having an adapter bolt-joint hole at each square corner thereof, the adapter bolt-joint holes respectively confront the bolt-joint holes of the square flange of the main pipe, and a pair of legs protruding horizontal from a pair of the square corners of the adapter square flange,
• wherein the adapter square flange is selectively turnable by a 90-degree around an axis of the main pipe so as to connect the pipe adapter to the manifold with four bolts respectively inserting through the adapter bolt-joint holes and the selected corresponding bolt-joint holes to fasten the pipe adapter to the manifold.