... A106A/A106B/A53A/AP5LGradeB/A178/179 5.ISO,api oil pipeline Heavy wallthickness seamless steel pipeThick wall seamless steel pipeOD:1 ... as well as. ASTM A106 For the purpose of the pipeline project of boiler, water & petroleum. ASTM A53 it is used ... A192 For manufacture wall panel, economizer, reheated, superheated and steam pipeline of boilers.Main product: seamless steel pipe,pipe fittings, oil ...