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It produces steel pipes that used for oil pipe, gas pipe and energy pipe. - details see: https://www.machineto.com/273-erw-api-steel-pipe-making-line-tube-mill-line-10081787

273 ERW Pipe Line:

Forming and sizing units uses combination of FF forming and FFX forming to produce steel pipes through HF induction welding. Heating method uses HF induction or contact welding, i.e. steel pipe fed into the mill is formed into pipe profile by forming rolls. With skin effect and proximity effect of high frequency current, induced electricity is concentrated onto the bonding surface of the pipe profile fringe to heat it up quickly to welding temperature, and finishes pressure welding when pipe fringes squeezed together by squeezing roll. After normalizing, cooling, sizing and primary straightening, steel pipe of desired size is produced.

Designing guideline:

• To improve the serviceability and productivity
• To meet safety requirements of multi-product small-batch production
• To improve the environment and safety in operation
• To improve the stability of the product quality
• To improve the yield of the line
• To reduce cost of the equipment

Advantage of the line:

More shared rolls, easy adjustment, high quality weld seam, sturdy machine frame, easy operation and maintenance.

High-frequency steel tube mill, used to produce welded mild carbon steel tubes, the outside diameter range of the steel tube within production capacity is from 4.76mm to 219mm, wall thickness range is from 0.3mm to 8mm.

API model mainly produces high level steel pipes, such as delivery pipe of petroleum and natural gas, oil well casing and so on. The requirements for material and quality are very strict. The mill is equipped with section equipment and technological equipment, such as IF annealing, air-cooled roll table, ultrasonic inspection, high pressure hydraulic pressure testing machine and so on.

273 Main TechnicalParameters:

Mill speed: 20~60m/min;

If 600kW solid state high frequency welder (China make) is used, estimated speed of the line can be:

Outer Diameter		Thickness
Rectangular Pipe	Square Pipe	4.0	5.0	6.0	7.0	8.0	10.0	12.5
100×60	80×80	65	50	45	--	--	--	--
120×60	90×90	62	48	43	--	--	--	--
120×80	100×100	60	45	40	38	--	--	--
160×80	120×120	55	45	40	35	33	26	--
180×100	140×140	50	45	38	32	30	25	20
200×100	150×150	45	42	35	32	30	25	20
200×120	160×160	45	42	35	32	30	25	20
	180×180	40	38	32	30	28	22	20
	200×200	38	35	32	30	28	22	20

Forming method: FF forming

Output capacity: 100,000t/per year