The production lines are used to make plastic-aluminum-plastic (PAP) multilayer pipes.
    The external and internal layers of the pipes are plastics, e.g. PE, and middle layer is butt-welded aluminum. All the layers are solidly adhered with each other. Therefore, the pipes are also called composite pipes or composite pressure pipes.
    The pipes made by these lines are in compliance with ASTM-1335-2004 .

v High yield speed, up to 25m /min,
v High operating reliability, yielding high quality pipes continuously,
v Low power consumption, only 160KW total actual power consumption of a line,
v Fast exchanging welding guns without interrupting pipes yielding with a dual-gun system,
v Precision aluminum pipe forming system based on know-how,
v Precision butt-welding system, great welded seam strength and excellent roundness of the       yielded pipes,
v High performance extruders withprecision diesand advanced vacuumcalibrators,
v Remote network control system based       on PLC control, special control       software, self-learn function,
v Can be extended to produce composite       stainless steel-plastic pipes.

    In 1997, Guangzhou Advance-Tech Co., Ltd developed the first automatic PAP multiplayer pipe production line in China . Up to the first half year of 2006, the company has sold more than 40 lines of this kind to both domestic and overseas customers.