Perfect Quality Control System

Duowei Company has established a quality control system based on ISO9001:2015 quality management system, ISO14001:2015 environment management system, OHSAS18001:2007 occupational health management system, EN1090-1 CE management system, and the AISC201-2006 standard AISC201-60, the AISC420-2010 standard AISC420-10 and the SSPC-QP3 of American Institute of SteelConstruction. It has formed 3 management manuals of the assembled steel structure parts, 38 procedure documents, 13 management regulations and specifications, 11 inspection specifications and 8 technological specifications for the company, and has established a perfect quality control system.


Complete Quality Inspection and Testing System

Duowei Company has built a complete quality inspection and testing system for steel structures. All processes and links are inspected and tested to ensure the quality of finished components, including the physical and chemical analysis of raw materials such as steel plates, profiles, welding wires and fluxes, high-strength bolts and paints, the appearance of welds and NDT, blanking, sawing, assemblage, assembling, impeller blasting, coating and packing.


Production Process of Conventional Structure


Applicable Packing Logistics System

For different projects, component types and transportation distances, Duowei Company makes special and applicable packaging forms and logistics transportation methods so as to assure the quality of finished products of steel structure parts transported to the project site.