... ,304, 321,316,316L OD :10~500mm wall thickness :1~5mm stainless steel round tube 201Grade :201 202 304 304JI 321 316L 310SStanard ... , Φ16*2, Φ18*2, Φ20*2, Φ22*3, Φ25*2.5, Φ27*3, Φ32*3, Φ34*3, Φ38*3, Φ42*3 ... , Φ45*3, Φ48*3, Φ51*3, Φ57*3, Φ57*3.5, Φ60*4, Φ76*4, Φ89*4, Φ108*4, Φ133*4 ... , the protection of pipe end, anyway according to customers' requirment. stainless steel round tube 201