Hebei zhonghai Steel Pipe Manufacturing Co., Ltd. is one of the largest manufacturers of carbon steel seamless pipes in China. Our main products are LARGE DIAMETER SEAMLESS STEEL PIPE(from 8” to 42”), Spiral steel pipe ( from 8” to 36”) and ERW steel pipe(from 3” to 28”),as per international standard ASTM/BS/DIN/EN/JIS etc. We have ISO9001:2000 and API 5L certificates; can provide BV?SGS?LR?IBR Third party inspection. Welcome to visit our factory! E-mail:elainewang811(at)hotmail(dot)com