The fundamental features of the Intermittent-acting mill
　　1.It could make great deformation to combine forging with rolling
　　2. It is with large coefficient of extension which can get to 10~20
　　3.The pipes with many kinds of steel grade could be rolled
　　4.The millable range of the wallthickness is so wide that it could get to 80-100mm
　　5. Low output
　　6.Low productivity
　　7.The wastage of the instrument is a little heavier.

　　Second.
　　Process Flow: Bloom→Heating in the Rotary Heating Furnace→Heat-centering→Piercing→Rolling periodically→Hot-saw cutting→Re-heating in the Walking furnace→Sizing→Cooling→Straightening→End-cutting→Finishing Operating→Finished products-Making

　　Third. The dimension parameters of the pipe billet and pierced ones unit: mm

　　Forth. The specification range produced in accordance with its ingot case
　　●Φ350→Φ219、Φ245 and some sizes in sizeΦ273
　　●Φ390→Φ273
　　●Φ430或450→ Φ299、Φ325 、Φ351、
　　● 450→ Φ356（S≤30）、Φ377（S≤25）
　　● 500→ Φ356（S＞30）、Φ377（S＞25）、Φ406（S≤25）、 Φ426（S≤23）
　　● 550→ Φ406（S＞25）、Φ426（S＞23）、Φ457（S≤41）、 Φ480（S≤32）、Φ508（S ≤ 30）
　　● 580→ Φ480（S＞32）、Φ508（S为31~52）
　　● 650→ Φ508 （S＞52）

　　Fifth. The specification and kinds of the production
　　(1)Size: the direct rolled ones: Φ219～Φ508×10 ～100 mm
　　　　Size: Second Piercing or piercing directly: φ535.3～φ718.1 ×30 ～120 mm
　　(2)Kinds: Pipes for structure use; Heavy wallthickness pipes used for machining. Hydraulic Support Prop Pipe; High pressure boiler tube; High pressure gas cylinder pipe; Pipes used for nuclear power; pipes applied to oil and chemical area; pipes used for war industry; line pipe, oil casing etc.
　　(3)Material: Carbon Steel, Low Alloyed steel; High Alloyed steel; Stainless steel etc.
　　(4)Kinds and specifications could be Normalized online
　　　　Kinds: Such series as 20G、A106B/C、16Mn、12Cr1MoVG、Q etc.
　　　　Size: Principling, D≤Φ426、S ≤25