Outer Diameter: 3000mm Material: Q235B Standard: SY/T5037 Contact Person: Sheila ShaTianjin Zhongshun Petroleum Steel Pipe Co.,Ltd.Add: Caigongzhuang Industrial ... Park, Jinghai County, Tianjin,ChinaMail: sheila at zssteelpipe.com SKYPE: sheila.zhongshunZhongshun Steel Pipe, Connecting the World. Product nameSpiral ...