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              | Changzhou Darun Steel Tube Co., Ltd. specializes in the production of OCTG, seamless steel tubes for boilers, structure and liquid according to standards ASTM, API 5CT, API5L (license no. 5CT-0704 and 5L-0520). |  |  
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              | steel pipe, steel tube, casing and tubing, line pipe, API tubing, drill pipe, OCTG, pipe, tube |  
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                      | Company : | Changzhou Darun Steel Tube Co., Ltd |  
                      | Email: | Contact us |  
                      | URL: | ******** ********
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                      | Phone: | ********* |  
                      | Fax : | ********* |  
                      | Country : | China |  
                      | Address : | ********* |  
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