... , W.T: 1-16mm 3.For boilers 1. Seamless stainless steel tube2. Standard&steel grade: ASTM A213 TP304,TP304L,TP316,TP316L,TP321, ASTM ... A269,ASTM A312 and equivalent standards&steel grade.3. Size range: OD:6-325mm, W.T: 1 ... ", and loose packing for size above 8".8 Application: seamless stainless steel tube can be used for petroleum cracking, fertilizer equipment,boilers,fluid ...