China Plastic Industry Association and China Petroleum & Chemical Industry Association, is a leading company in China for plastic composite Pipe technology. Goldstone Company has collected numerous of engineers and consultants who have abundant experience in plastic Pipe making and application. Our products ranges various high/medium/low pressure reinforced composite Pipe, large size plastic solid wall Pipe, thermoplastic (thermosetting) plastic composite Pipe, large size steel reinforced spiral corrugated sewage Pipe and the connection technology. To be the technology leader in China for plastic reinforced Pipe, Goldstone always insists to develop the owned intellectual property and know-how. Up to now, we have received over 30 national patents for our innovation products. Through years’ development,...