seamless steel pipe 1.standard: API 5L GB/T9711 2.Steel grade:API 5L B,X42,X52,X60,X65,X70 3.technology: seamless ... pipe seamless steel pipe1.standard: API 5L GB/T97112.Steel grade:API 5L B,X42,X52,X60,X65,X703.technology ... /T9711GradeB,X42,X52,X60,X65,X70applicationAs conveyer pipe in the fields of petroleum and natural gasOutside diameter114.30-508.00mmWall thickness5 ...