... ASTM A 554 standard.Features:1) Material of stainless steel: grade: 201, 202, 304, 304L, 316, 316L etc.2) Applied field ... 22, 25 x 25,30x 30, 38 x 38, 40 x 40, 50 x 50, 60 x 60, 80 x 80mm3) Rectangular pipe ... specification: 15 x 10, 20 x 10, 25 x 10, 25 x 13, 30 x ... , 38 x 25, 50 x 25, 75 x 45, 60 x 30, 60 x 40, 95 x 45, 100 x40,100 x 50mm4 ...