1 Standard: ASME B36.10 2 Material:ASTM A53 3 Size: 1/2" to 48" 4 Thickness: 2.11 - 59.54mm 5.As customers request Specification: Product name: Steel tube ASTM A53 Standard: ASME B36.10, API, 5L JIS, DIN 1629, DIN 17175, GB8162, GB8163, GB5310.Or as per customer’s special requirement.Material: ASTM A106 GRB/ A53 GRB/ Q345/ Q235/ A335/ ST37/ ST52/ 20#/ 10#/ API 5L GRB, PSL1, X42, X52 … etc.Or as ...