... steel seamless pipe 1.Type:round,square,rectangular 2.Standard:ASTM,A554,A269 3.Grade:201,304,202,301,316,316L ss seamless ... pipe/tube ISO9001:2000 ASTM/AISI standard Grade 304,316L,321 ... power, chemical industry, chemical fiber and medical machinery etc.ss seamless pipe/tubeWe will provide products with satisfactory quality, competitive price ...