... 12.9 Bolts;N90 O-Ring Welding,Thread,Blind Flanges Quality is the life of enterprises. Our products include ... fittings, hose assemblies, industrial hose assembly,SAE flanges ,flare flanges,retain ring flanges and other related connectors. Certified in accordance with ... art manufacturing technologies and a foresighted management , we can offer our customers good quality products ,service and advice, and ...