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Straight Seam HF Welded Pipe Mill

DescriptionThe steel plates in certain width after slitting and stripping are unfolded and leveled and then sent into a forming machine. By using the roller, the steel pipe is processed into pipe state. The edge of the steel plate is melted by the proximity effect and skin effect of high frequency current. Then the plate is extruded and welded into pipes by using extruding roller. High frequency straight seam welded pipe mill is also called ERW (electric resistance welding) pipe mill.

Application1. High frequency straight seam welded pipe mill is suitable for all kinds of round pipe, square pipe and rectangular pipe.2. According to the product functions, welded pipe making machine is divided into API model and national standard model. API model mainly produces high level steel pipes such as delivery pipe of petroleum, natural gas and oil well casing. National standard model mainly produces the steel pipe, such as water-gas pipe and structure pipe.

Advantages1. In the preparation process, high frequency straight seam welded pipe mill mainly developed the volume type loop hoppers.2. In the aspect of forming unit, this welded pipe making machine developed double wire forming.3. The structure of forming unit developed part of the vertical roll group, the small row roller straight shape and vertical roll shape.4. In the operating line, high frequency straight seam welded pipe mill set up online continuous flow inspection and ultrasonic inspection.5. In the steel tube heat treatment technology, it developed online welded heat treatment, off-line frequency induction heat treatment and continuous bright annealing heat treatment.

Classification1. The forming styles of high frequency straight seam welded pipe mill can be divided into roll forming, cage forming, flexible forming (or F•F•X forming) and full auto flexible forming (F•F•X forming).2. 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.3. According to the products functions, high frequency straight seam welded pipe making machines can be divided into API model and national standard model.

Production ProcessLoading Coil → Uncoiling → Leveling → Cutting and Steel Welding → Accumulator and Material Storage → Forming → High Frequency Welding → Water Cooling → Online Ultrasonic Inspection → Intermediate Annealing → Air Cooling → Water Cooling → Sizing → Flying Saw Sizing Cut Off → Pipe End Facing and Beveling → Hydraulic Testing → Off-Line Ultrasonic Seam Inspection → Off-Line Ultrasonic Tube Inspection → Weighing and Measure Length Spraying → Finished Products Connection

Main Projects and Clients on ERW Pipe Mill

Equipment

Clients

Remark

1

114 Straight seam welded pipe mill

Lin Enterprises in Indonesia

Export Project

2

114 Straight seam welded pipe mill (straight edge cage forming)

Tangshan Jianlong Jianzhou Steel Co., Ltd (China)

3

114 Straight seam welded pipe mill

Steel Holding Co., Ltd in Kuming (China)

X60

4

168 Straight seam welded pipe mill (straight edge cage forming)

Thailand Puyi Industrial Company

Export Project

5

180 Straight seam welded pipe mill (straight edge cage forming)

Guangdong Shun’anda Peaceful Container Co., Ltd

6

168*10 Straight seam welded pipe mill (F.F forming)

Wuxi Yulong Precision Steel Pipe Co., Ltd (China)

API-5L

7

140-340 Straight seam welded pipe mill (F.F forming)

Tianjin Shenzhoutong Steel Pipe Company

J55 X65

8

140-355 Straight seam welded pipe mill (F.F forming)

Tianjin Lianzong Steel Pipe Co., Ltd

API-5CT

9

426 Straight seam welded pipe mill (F.F forming)

Haicheng Northern Steel Pipe Anticorrosion Co., Ltd (China)

J55 X65

10

219 *14 Thick wall straight seam welded pipe mill (F.F forming)

Tianjin Youfa Steel Pipe Co., Ltd

API

11

508 × 14 (400 × 400) Straight seam welded pipe mill

Korean General Steel Pipe Co., Ltd

Export Project

12

530 × 16 Full automatic flexible forming ERW mill

Russian Guotong Steel Pipe Co., Ltd

Export Project

13

711 Full automatic flexible forming ERW mill

Anshan Hongxiang Steel Pipe Co., Ltd

API-5 L

Parameters of High Frequency Straight Seam Welded Pipe Mill

Model

Specification

Speed (m/min)

Thickness (mm)

Coil Weight (ton)

Capacity (kW)

Machinery Floor Area (m2)

1

ZFJZ-100

Φ42 - Φ114

30-60

3-8

15

1100

2 × 18 × 200

2

ZFJZ 160

Φ60 - Φ165

30-55

3-10

10

1600

2 × 21 × 260

3

ZFJZ-200

Φ11 - Φ219

20-45

4-14

15

1800

2 × 21 × 260

4

ZFJZ-300

Φ16 - Φ325

10-40

5-16

20

3000

2 × 24 × 300

5

ZFJZ-350

Φ16 - Φ355

8-35

5-16

20

3500

2 × 24 × 300

6

ZFJZ-400

Φ21 - Φ406

8-30

5-20

30

5000

2 × 24 × 400

7

ZFJZ-500

Φ21 - Φ508

8-25

5-20

30

7000

2 × 30 × 400

8

ZFJZ-600

Φ21 - Φ610

8-20

5-22

40

9000

2 × 30 × 400

9

ZFJZ-700

Φ27 - Φ711

8-20

5-25

40

10000

2 × 30 × 400



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