... GB/T585-1999,flanged cast steel valves,used for war ship and merchant ships,provide CCS certificate. cast steel stop valvestype:A and B ... check valves:bronze,brass,gun metal,cast iron,forged steel.cast steel,stainless steel,nodular cast ironjiangyin marine valves co.,ltd provides ... and so on.the company can provide CCS and other ship inspection certificates based on customer's requirement.welcome to ...