the series of pp-r tubular product sand fittings produced by zhejiang qiai tubing co., ltd are produced according to the standard technics of international iso/dis15874、din8077、din8078 and the company criterions q/zns002q-2001、q/zns003-2001 strictly. the quality of product and excellent service are guarranteed through our strict carrying out of iso9001-2000 quality assurance system.