Henan Shenzhou Heavy Seal Heads Co., Ltd., established in 1973, is a specialized enterprise which is the earliest one getting the manufacturing license for boilers and pressure vessel heads in Henan province. We are the first company in head industry passing ISO9001 certification in 1998. We got manufacturing license for Class A3 head in 2004. Our tri-composite head produced in 2007 was awarded as "High-Quality Sheet Metal Component" in international forging exposition. In addition, our company was awarded the "Top 50 Company in Comprehensive Strength" in Henan province...