Our company passed the ISO9001, ISO14001 and ISO/TS16949 international management system certification, and obtain special equipment pressure pipe components manufacturing license (permission scope: metal hose PN ≤6.0 MPa, DN ≤1000 mm) (metal bellows expansion joint PN ≤2.5 MPa, DN≤ 800 mm PN ≤1.6 MPa, DN ≤1000 mm or PN ≤0.6 MPa, DN ≤1200 mm)] Our company has 1 national invention patents, more than 50 utility model patents, 3 national torch plan projects, 1 item of ministry of science and technology innovation fund project. Also, we are the industry standard for oil tank central drainage system (System number: SY/T0511.6- 2010) to participate in the drafting unit.