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: 8 to 42 (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 (219mma914mm); wall thickness: 6mma50mm.
4. Erw welded pipe, out diameter: 8a26 (219mma660mm), wall thickness: 5.0mma20mm

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.