1. ChangZeng has attained a GREENGUARD® certification for safe product emissions and an ISF® certification for superior picture performance. It is easy to process and economical
2. are equipped for Shanghai ChangZeng Metal Co., Ltd. in order to perform the procedure with perfect product. Its heat treatment includes annealed, quenched, tempered, etc
3. Through the devotion to the performance of , Shanghai ChangZeng Metal Co., Ltd. has received more and more orders. Heat treatment yields a higher wear resistance in this type of steel
1. Shanghai ChangZeng Metal Co., Ltd. is a well-known company for its professional service and finest galvanized steel tube .
2. Shanghai ChangZeng Metal Co., Ltd. has great confidence in the quality of two inch galvanized pipe by using technology.
3. ChangZeng will be dedicated to innovating the 10 inch metal pipe and improving management concepts. Contact us!