... ISO,BS 4)ISO9001:2000 1000pcs a week,sanitary stainless steel manhole cover sanitary stainless steel manhole cover1Material:SS304,304L,316,316L2)Size:applied ... to the stainless steel pipeline system3)ISO9001:20004)Standard:SMS,DIN,3A,IDF,ISO,BS,DS,BPE5)Application: dairy products,wine,beer,food ... -precision hygiene grade valves, pipe fittings and liquid equipment. stainless steel sanitary manhole cover