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Straight Seam Welded Pipe Mill
    发布时间: 2016-10-06 23:01    

Straight Seam Welded Pipe 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.  The 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)span>. The mill developed in our company adopts roll forming when having small diameter (Φ≤114). The cage forming is adopted when having small 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.

According to the products functions, the straight seam welded pipe mills are divided into API model, national standard model.

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, drifter and so on.

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 straight seam welded pipe mill:

No

Model

Specification (mm)

Speed(m/min)

Thickness(mm)

Coil weight(ton)

Capacity(kw)

Area(m2)

1

SSWP-100

Φ25Φ114

 

3060

 

38

 

15

1100

18×200

2

SSWP 160

Φ60Φ165

3050

 

310

 

10

1600

21×260

3

SSWP -200

Φ114Φ219

 

2040

 

414

 

15

1800

21×260

4

SSWP -300

Φ165Φ325

 

1030

 

516

 

20

3000

24×300

5

SSWP -350

Φ165Φ355

 

825

 

516

20

3500

24×300

6

SSWP -400

Φ219Φ406

 

820

 

520

30

4000

27×300

7

SSWP -500

Φ219Φ508

 

820

 

520

30

4500

27×300

8

SSWP -600

Φ219Φ610

 

820

 

520

30

5000

27×300