Technical performance of 168 high frequency straight seam welding pipe set

一、The unit performance:

The unit is mainly used for producing water and gas transmission welded steel pipe and thick wall welded steel tubes for mechanical structures.With welding seam intermediate frequency annealing equipment and On-line ultrasonic detection device.The production conforms to GB/T9711.1-1997, API-5L standard of oil and gas transmission pipe, API-5CT oil well surface casing pipe embryo.

The unit adopts international advanced F, F molding system.It has the advantages of stable forming, good surface quality,convenient to change specifications, etc.

二、Technical performance parameters:

1. Raw material: hot strip rolled after slitting.

2. Steel coil outer diameter: ф 1300mm - ф 2100

3. Steel coil inner diameter: ф 610mm, ф 700mm, ф 760mm

4. Coil width: 200-580mm

5. Material: Q235 (maximum wall thickness 10mm); J55,X65(wall thickness less than 8mm)

6. Maximum coil weight: 12T

7.product specifications:Ф73, Ф88.9, Ф108, Ф114.3, Ф139.7, Ф141.3,    Ф159, Ф168.3

Wall thickness: 3.5.~10mm(when the wall thickness is 10mm, material ≤Q235)

Length: 6 ~ 13.85 mm

7. Maximum welding speed :30 m/min

8. Annual output: 50,000 T

三、technological process：

Uncoiling-leveling-Shearing and welding-Horizontal spiral looper storage-Vertical roll align the middle-Edge planing → forming → high-frequency welding-Remove internal and external burrs-Intermediate frequency treatment of welds-Air cooling → water cooling → sizing → straightening → cutting-Preliminary inspection of size and appearance-Flat head chamfering-Hydrostatic test → off-line ultrasonic inspection → finished product inspection → spray label → oiling → air drying

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