... seamless pipe with DIN 11850, 3A,SMS3008,ISO1127,BS4825-1,ASME BPE, GB/T17395 standards, custom polished. Stainless Steel tube Feature: ... 420Grit/Unpolished Sanitary stainless steel tube, stainless steel pipe, 304 stainless steel tube, 316 stainless steel tube, polished. Sanitary pipe and seamless pipe with DIN 11850, 3A,SMS3008 ... provide 3.1B certification of EN10204 for all the steel material.