PISON INTERNATIONAL GROUP CO., LTD is located in Qingdao City, We have more than 20 years experience in manufacturing valves, flanges, pipe fittings and casting & forged part, passed the ISO9001-2000 , API6D/API6A,API607,CE/PED ,ISO14001 , ISO28001 etc. The annual amount of export has been up to ten millions dollars. We are orienting ourselves to the world trends and have availed and promoted our business contact of mutual benefit with customers from more than 120 ...