The LSAW steel pipe producing equipments

The major equipment such as Plate Edge Milling Machine, Plate Edge Crimping Machine, Pipe Forming Press, Tack Welding Machine and Pipe Expander all adopt the technology and equipment of SMS MEER. The SMS MEER is the most famous special manufacturer to design and manufacture the whole production line equipment for LSAW pipe in the world . They have supplied all kinds of steel pipe manufacturing equipment for plenty of LSAW pipe manufacturers in the world and have got a very good reputation in this field.

Plate Edge Milling Machine: The machine can carry out automatic plate centering. And the cutter heads have float copying function according to the waviness of the plate to ensure the two edges of the plate with the same welding chamfers and dimensions. In addition, the milling speed and amount for each milling can be adjusted automatically according to the steel grade, wall thickness and the welding bevel angle. The good coordination between cutter heads and the plate clamping carriage feed system ensures constant parameters in the whole milling process, thus the quality requirements of the milling can be met. The precision of the welding chamfer is a major precondition for the quality of the later weld.

Plate Edge Crimping Machine: It's an automatic hydraulic crimping press. The scientific design of die radius and transition ensures a complete edge bending deformation. And press elongation will not occur during edges bending of heavy-wall-thickness plate. The bending shape produced on this machine is much better than the shape bent on the roller bending machine. It provides good precondition for the later forming, welding and expanding processes.

Forming Machine: It's an intelligentized hydraulic forming machine with CNC20 controller. During the forming, the movements of upper & lower beams and plate delivery manipulator are controlled by computer. The stroke of the upper & lower beam and press force as well as the plate feed can be adjusted automatically according to steel grade, plate wall thickness and plate width. The upper & lower beams have the function of the deformation compensation to avoid the negative effect on the forming process due to the upper & lower beam deformation. The straightness in the full length of the plate can be ensured during the forming process. The forward length of each step is uniform so that the roundness and the welding edge parallelism can be ensured as well.

Tack Welding Machine: During tack welding, the open seam pipe is transported through stands designed as roller cage with eight rows of rollers. In this roller cage, the longitudinal edges of the open-seam pipes are positioned exactly parallel to one another and welded, the exact guidance prevents effectively from the edge offset and creates a uniform welding gap. The tack welding is performed using high power and continuous metal active-gas arc welding(MAG welding) which is traced by laser system. The welding machine is imported from German U&S Company which is very famous in this field. The continuous tack weld acts as a weld backing for the subsequent inside & outside welding.

Inside Welding & Outside Welding Equipment: All welding equipment is imported from German U&S company. This company is a specialist manufacturer for LSAW pipe welding equipment with rich experience especially in the multi-electrode process. By using this welding machine, the quality of the welding can be ensured.

Mechanical Expanders: The main purpose of an advanced mechanical expander is to size and straighten the pipes and increase the dimension precision of the pipe as well as improve the residual stress distribution status.

Ultrasonic Testing Equipment: This equipment is imported from Karl Deutsch in Germany, which is one of the most famous UT inspection equipment manufacturers in the world. This equipment has the characteristic of anti-disturbance and less inspection blind-area.

X-Ray Inspection Equipment: The major parts are imported from abroad. The supplementary parts are equipped by domestic special manufacturers.

The equipment and technology equipped in this production line are state-of-the-art facilities in the world.

Weled steel pipe specification, Standard and identification

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.