由首钢东华机械厂试制生产的φ159×4.5mm输送焊接钢管于1989年10月通过鉴定。由军、地专家学者组成的鉴定团听取了该厂试制工作汇报,审阅了“军用油库输送焊接钢管”试行标准,经对钢管的水压、爆破、拉伸、压扁等工艺性能指标全面现场复查后认为:该产品达到了“军用油库输送 The trial production of φ159 × 4.5mm welded steel pipe by Shougang Donghua Machinery Factory passed the appraisal in October 1989. The appraisal group composed of the military and local experts and scholars listened to the trial production of the factory and reviewed the trial standards for the delivery of welded steel pipe in the military oil depot. After comprehensively examining the performance indexes of steel pipe such as hydraulic pressure, blasting, drawing and crushing, After review that: the product reached a "military depot transport