25-114mm ERW pipe making machine: Dia. : 25mm-114mm Thinkness: 3mm-8mm Coil weight: 15 tons

The introduction of ERW mill

The plate in certain width after slitting line and stripping is unfolded and leveled. Then, they are sent into forming machine. Used the roller, the plate is bent into pipe state. The edge of the steel plate is melted by making use of the proximity effect and skin effect of high frequency current. Then, the plate is extruded and welded into the pipe by extruding roller.  Straight seam welded pipe mill also is called ERW mill.

 

 

The forming styles of straight seam welded pipe can be divided into roll forming,cage forming,  flexible forming (or F·F·X forming), full auto flexible forming(F·F·X forming). The mill developed in our company adopts roll forming when having small diameter (Φ≤114). The cage forming is adopted when having s mall DC thin wall (Φ≤165,δ≤6).  Flexible forming is adopted when having middle diameter (Φ≤340). Full auto flexible forming is adopted when having large diameter.

Production process:

Loading coil-uncoiling-leveling –cutting and butt welding – looping and material storage – forming – high frequency welding – IF annealing- air cooling- water cooling-sizing- flying cut off- flat head chamfering-hydraulic testing-ultrasonic inspection-spraying – products connection

The bearing types of ERW mill:

No	Model	Specification(mm)	Speed(m/min)	Thickness(mm)	Coil weight(ton)	Capacity(kw)	Area(m2)
1	ZFJZ-100	Φ25~Φ114	30~60	3~8	15	~1100	18×200
2	ZFJZ 160	Φ60~Φ165	30~50	3~10	10	~1600	21×260
3	ZFJZ -200	Φ114~Φ219	20~40	4~14	15	~1800	21×260
4	ZFJZ -300	Φ165~Φ325	10~30	5~16	20	~3000	24×300
5	ZFJZ -350	Φ165~Φ355	8~25	5~16	20	~3500	24×300
6	ZFJZ -400	Φ219~Φ406	8~20	5~20	30	~4000	27×300
7	ZFJZ -500	Φ219~Φ508	8~20	5~20	30	~4500	27×300
8	ZFJZ -600	Φ219~Φ610	8~20	5~20	30	~5000	27×300

25-114mm ERW pipe making machine