... steel pipes 2 material carbon steel stainless steel alloy steel 3 Size 1/2"-24" 4 MIN order 100 pieces Steel ... 106A,B,C-API 5L A,BASTM A 333 Gr1,3,6,9 API 5LX52,60,65,70 Stainless steel: ASTM A240 ... ,310,316,Alloy steel : ASTM A 335 P1,5,7,9,11,12,22,91 seamless steel pipes