1.Highly quality control and strict surface roughness test. 2.ISO9001:2008,CE,TUV certified. 3.DIN,SMS,ISO,AS,BS,RJT.BPE . Sanitary Stainless Steel Liner1.SIZE:DN15,20,25,32,40,50,65,80,100,125,150.2.MATERIAL:AISI304,AISI304L,AISI316,AISI316L.3.STANDARD:DIN,SMS,ISO,AS,BS,RJT.BPE. Sanitary Stainless Steel Liner