ERW720 high frequency longitudinal welded pipe production line / pipe making machine / tube mill is designed to produce welded pipes of 355mm-720mm in OD and 6.0mm-22.0mm in wall thickness, as well as corresponding square and rectangular pipe. 
 
Products:  architectural structure tubes, API pipes and other products.
 
Equipment advantages：
√ China's largest straight seam welded pipe production line
√ Apply to high strength steel and big thickness
√ Raw material can be steel coil and single plate
√ ZTF forming process save roller up to 60%
√ With direct square forming technology, one set of roller can produce all pipe sizes
√ Electric control and automatic adjustment, high precision,high roller change speed
 
 
Basic Technical Information of Welded Pipe Production Line
  

Product&yield	Round Pipe	355mm-720mm                    Thickness:6.0mm-22.0mm
	Square & rectangle tube	300mm×300mm -600mm×600mm    Thickness:6.0mm-22.0mm
	Length	6m-12m                           Length Tolerance: ±3mm
	Production Speed	20 m/min
	Production capacity	180,000ton/year
Consumption	Mill installed capacity	1400 kw
	Line Area	400m(length) ×40m (width)
	worker	6-8 workers
Raw Material	Carbon steel coil & steel plate Q235B(ASTM GR·D,σs 230) & High-strength steel

 
  

Round pipe	Cold roll forming process	Good roller design
	ZTF forming process	Save roller up to 60% and realize electric control adjustment
Square & rectangular pipe	General round-to-square process	Stable forming process
	Round to square with turkshead	Good pipe quality, reach same wall thickness with round pipe
	Process of directly forming into square shape	One set of roller can produce all pipe sizes & realize electric control and automatic adjustment

  

Model	Round pipe mm	Square pipe mm	Thickness mm	Working spead m/min
ERW20	Ф8-Ф20	6x6-15x15	0.3-1.5	120
ERW32	Ф10-Ф32	10x10-25x25	0.5-2.0	120
ERW50	Ф20-Ф50	15x15-40x40	0.8-3.0	120
ERW76	Ф32-Ф76	25x25-60x60	1.2-4.0	120
ERW89	Ф42-Ф89	35x35-70x70	1.5-4.5	110
ERW114	Ф48-Ф114	40x40-90x90	1.5-4.5	65
ERW140	Ф60-Ф140	50x50-110x110	2.0-5.0	60
ERW165	Ф76-Ф165	60x60-130x130	2.0-6.0	50
ERW219	Ф89-Ф219	70x70-170x170	2.0-8.0	50
ERW273	Ф114-Ф273	90x90-210x210	3.0-10.0	45
ERW325	Ф140-Ф325	110x110-250x250	4.0-12.7	40
ERW377	Ф165-Ф377	130x130-280x280	4.0-14.0	35
ERW406	Ф219-Ф406	170x170-330x330	6.0-16.0	30
ERW508	Ф273-Ф508	210x210-400x400	6.0-18.0	25
ERW660	Ф325-Ф660	250x250-500x500	6.0-20.0	20
ERW720	Ф355-Ф720	300x300-600x600	6.0-22.0	20