Carbon steel seamless pipe Api carbon seamless steel pipe Od:6"-36" wt:4-60mm Api 5l spiral welded pipe Certificate: iso ce China hebei zhonghai steel pipe manufacturing co, .Ltd is one of the best Professional manufacturers specializing in producing: 1. Large-diameter heavy walled carbon steel seamless pipe, out diameter: (219mma1220mm); wall thickness: 6mma50mm. 2. Spiral steel pipe (ssaw), out diameter: 8¨¤ to 88¨¤(219mma2220mm), wall Thickness: 6mma20mm. 3. Api 5l line pipe (b/x42/x52/x60 steel grade), out diameter: 8¨¤ to 36¨¤ (219mma 914mm); wall thickness: 6mma50mm. 4. Erw welded pipe, out diameter: 8¨¤a26¨¤ (219mma660mm), wall thickness: 5.0mma 20mm Standard: astm a106 gr.B, astm a53 gr.B, api 5l gr.B, en10204/3.1b, din1629-1948, Din2448, en10216-1, en10217-1, sy/t5037-2001, gb/t9711.1 etc. Quality control : bv, sgs, lloyds Packing: spray painting, oiling, anticorrosion & insulation , bevel or plain end, Protect of pipe end and packaging.