Discussion on Modification of Domestically-serving Small-sized Seamless Steel Pipe Mills

With so long a history of operation in the country,the small-sized seamless steel pipe mills featur-ing employment of piercing-cold drawing process once made great contributions to development of the national economy.However such pipe mills still stay with a number of shortcomings such as backward technological equip-ment,inferior product quality,high energy and material consumptions,serious pollution and poor labor condi-tions,etc.,and thus badly need to be modified.It is proposed in the paper that the Φ114 mm(semi-) mandrel pipe mill and the Φ114 mm CPE push-bench mill be the ideal mill types for modification of the small-sized seamless pipe mills.