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standard seamless steel pipes Product specifications 1.Size: Φ1/8”---Φ36". 2.Standard: ASTM A 106 Gr B, API 5 L/A53, GB/T8162-1999 , DIN, EN, JIS, etc. 3.Thickness 2mm-59.5mm, SCH 20, 40, 80, 160, STD...