Recently, the subsidiary of Wolwa group in shandong volwa pipe co., LTD. ("Wolwa pipe" for short) producing DN600 20000 meters and 1000 meters of DN800 gas drainage pipes are sent to a large coal mines in Shanxi province. The gas drainage pipes is produced independently by Wolwa Pipe,is a special drainage gas pipeline. It is with light weight, easy to install,corrosion resistance, long service life, small resistance of transmission fluid, excellent flame retardant and antistatic properties, is highly praised by domestic and foreign customers.

Over the years, Wolwa pipe products has never been any quality problems, and won good trust of many large mining groups. We have reached an agreement with a number of large coal group for long-term strategic partnership. Currently, Wolwa Pipe's products have been successfully applied to more than 400 coal mines at home and abroad.