Qishine Pipe Fastener Gasket Co., Ltd. (https://www.qishine.com/) has always been at the forefront of the pipe fittings industry. Qishine is a professional manufacturer of pipe fittings. Our products include gaskets, bolts and nuts, flanges, pipe fitting, valve and steel pipes. Our factory covers an area of 100,000 square meters. There are 380 employees, more than 90 senior enginee... https://www.qishine.com