... 5.PL,SO,WN Cangzhou Shengtong Stainless Steel Products Co.,Ltd is the high-tech enterprise ... stainless steel , carbon steel and malleable iron such as valves and pipe fittings. Also Proxy design Heterogeneous valve , ... products cover ball valves , globe valves, gate valves, check valves, strainers, sanitary fittings, quick couplings and various ... us for a brighter future. Forged RF carbon steel flange