1)api 5l carbon steel pipe 2) OD 19.05-508mm WT: 1-60mm 3) ASTM , ... , 12CrMoG, 12Cr2MoG, 15CrMoG, 12Cr1MoVG, 12Cr2MoWVTiB GB9948 10, 20, 12CrMo, 15CMo GB3087 10, 20 Delivery Condition: Annealed, Normalized, Normalized and Tempered Inspection ... treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting. seamless round pipe )api 5l carbon steel pipe api 5l carbon steel pipe