Application ú¦ it is used for conveying gas, water, and petroleum of both the oil and natural gas industries. We supply: 1). Sizes (o.D. X w.T): from 13.7mm -- 323.9mm x 1.5mm to 36mm 2). Stanard: api 5l. 3). Steel grade: a, b, x42, x52, x60, x70, x80 4). Surface: oiled or black painted to prevent rust 5). Marking: as per customer's requirement Inner packing: Caps on two ends of every pipe Package:bare packing/bundle packing/wooden carton packing.