ERW Carbon Tube Making Machineine

Introduce:

   12" Pipe Welding Line is mainly used to weld round and square/ rectangular pipes. This line utilizes roll forming to process steel strip into various shapes. It is also capable of producing closed profile of various diameters and sizes by high frequency induction heating and welds seam squeezing.

Advantages:

(1) Realizes complete common-use of roughing mill rolls, with parameters of each roll for different products stored in quick setting system. When same pipe is to be reproduced, this quick setting system can set and adjust roll positioning automatically by recalling parameters for this pipe size, maintaining constant dimensional accuracy for same pipe size produced in different production batch.

(2) Capable of accommodating wide size range (OD range 1:3, thick/diameter ratio range 1%~10%)

(3) Superior end forming capability

(4) Superior overall shape control capability

(5) Uses continuous edge bending forming to realize good forming performance

(6) Use involutes roll caliber and curl forming to realize common use of upper and lower rolls.

(7) Use multi-section W-forming and shortened vertical roll section to restrain rolling effectively.

 325 Parameters:

 Raw material :

 Thickness: 3.0~14.0mm (X70≤11.0mm)

 Width:    350~1050 mm

 Coil weight: 20~25t

 Coil ID:  Φ760 mm;

 Material:  Q235;Q345B;J55;X70

 Finished product :

 Round: 4" (114) – 12" (325 mm )

 Cut-to-length:   6~13m

 Welding speed:   12~35m/min

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

If solid state high frequency welder of 600kW is used, welding speed is estimated as follows:

Technical standards: API 5L API 5CT GB/T 3091 JIS G3452 JIS G3444 JIS G3445 ASTM A513 EN 10219

Steel grade: Line pipe: A, B, X42, X46, X52, X56, X60, X65, X70

Petroleum casing pipe: H40, J55, K55

Structural pipe: Q215, Q235, Q345, 20#

12" OD production target, 4000 working hours/year

Delivery:

Within 8 months from the date after signature of the contract and receipt of the downpayment.

Warranty:

The warranty will cover a period of one year starting from delivery for machines under normal operation conditions (Force Majeure excluded)