Dealing with ERW steel pipe, galvanized pipe, spiral pipe, square pipe, steel-plastic composites pipe, Zhengda pipe comprehensive strength has been one of top 3 in steel pipe industry. Focusing on manufacture and sales, it is a modern comprehensive enterprise of technology research, trade, cultural development.

Zhengda Pipe has been approved by ISO9001-2000, ISO 9001:2008, ISO14001:2004, BS-OHSAS 18001:2007 by MOODY, API5L. AS a certified provider by Sinopec, “Tianhong” brand has been recognized “famous trademark in Hebei”, “famous trademark in China”, “famous trademark in steel industry”. “Tianhong”steel pipe is generally used in oil pipe line, oil and gas delivery, water supply and drainage, fire control, CNG, heating supply, steam delivery and other Low pressure fluid delivery also support frame, threading, steel structure, cold bending profiles and so on.