Welded manufacturing of steel structures (that is, production of welded structures) starts from the preparations for welding production, which includes structural technical review, process plan and process specification design, process evaluation, preparation of process documents (including quota preparation) and quality assurance documents , order raw materials and auxiliary materials, outsource and design and manufacture assembly-welding equipment and equipment; and then start the welding structure manufacturing process from material storage, including material re-inspection and storage, material preparation processing, assembly-welding, post-welding Heat treatment, quality inspection, finished product acceptance; interspersed with rework, painting and painting; the whole process of final qualified products storage.