四川和西南地区原有焊管机组生产的焊管尺寸均在Φ114mm以下,绝大多数的机组设备简陋、装备水平低、生产能力小、产品质量差。它们以生产水煤气管和建筑用管为主,无论从产品品种、规格,还是从产品数量、质量来看,都不能满足西南地区经济发展的需要,因此每年要从外地 Pipe production in Sichuan and southwestern regions of the original welded pipe size are Φ114mm below the vast majority of units simple equipment, low level of equipment, small production capacity, product quality is poor. They are mainly used to produce water gas pipes and construction pipes. They can not meet the needs of economic development in the southwestern region in terms of product varieties, specifications, or quantity and quality of products. Therefore,