Our company does well in producing Spiral submerged-arc welded steel pipe. We have 6 sets of advanced Spiral submerged-arc welded steel pipe production line and equipped with perfect test machines. The specifications is as follows: Outside diameter: from 219mm to 1820mm Wall thickness: from 6mm to 14mm We can produce meet the customer抯 requirement except the above specification. More details, please visit our homepage: If you have any inquiry, please feel free to contact me at: Looking forward to serving you with our best quality, competitive price and timely delivery. Best Regards. Amy Lee Zhang Aiming (general manager) Hebei ZhongYuan Steel Pipe Manufacturing Co., Ltd Nanhuan Road, Yanshan County, Hebei Province, China Email: Tel/Fax: 86-317-6085912 Web site: