The main machine is SJSZ51/105,SJSZ55/110 or SJSZ65/132 conical twin-screw extruder, is equipped with double-tube single-control stainless steel spraying shaper to form a production line. it avoids a waste condition when one tube is adjusted and the other one is affected. The auto single-control double tractors and cutting are combined with the front shaping technology to make operation more flexible. Let you enjoy economic benefit which is brought by separate control double-tube extruding. the diameter of the extruded pipe is from 16-50, 20-70.It can fully use of the extruding capacity of the extruder. Even if it produces small diameter pipe, it can get great output too.