Large diameter straight seam steel pipe

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What is a large-diameter straight seam steel pipe?, large-diameter straight seam steel pipe listening to the name we should also be clear, the West-East Gas Transmission Project was transported by large-diameter seamless steel pipe tinplate suppliers. At present, China’s large-diameter seamless steel pipe, the main production process is hot. Rolling large-diameter seamless steel tubes and heat-expanding seamless steel tubes, the maximum specifications of thermal expansion seamless steel tubes are 325mm-1220mm and the thickest is 200mm.

Large diameter straight seam steel pipe

The proportion of long-distance pipelines in foreign countries is 80%, and the opposite is true in China. At present, it is only 20%. However, with the development of the economy, everyone’s awareness has increased, especially the importance of safety, and the improvement of engineering design specifications. In the oil gas pipelines, the proportion of large-diameter straight seam steel pipes is increasing.

Large diameter straight seam steel pipe process and main equipment

The two sides are machined into the required form at a time. The steel edge milling machine: machine the two sides of the sheet for pipe making, and make the parallelism of the two plates reach the specified tolerance range, in order to produce high precision. The steel pipe is ready.

The steel plate has a steel plate to form a radius of curvature of the formed steel pipe with equal radius, and the steel plate pre-bending machine: pre-bends the side of the steel plate which is machined by the edge milling machine on both sides of the welding groove. Prevent the production of long straight edges in the forming steel tube to ensure the roundness of the steel plate.

Automatic steel tube forming machine: complete the bending of various metal sheets.

For further joint and pre-welding, steel pipe pre-welding machine: prepare the open blank of the forming machine to prepare for inner and outer welding.

The welding trolley transports the workpiece along the track, and the double wire inner welding machine is used for automatic submerged arc welding of the large diameter straight seam steel pipe, and the welding of the workpiece is realized with the main machine.

The welding trolley transports the workpiece along the track, and the double wire outer welding machine is used for automatic submerged arc welding of the straight seam steel pipe, and the welding of the workpiece is realized with the main machine.

In order to change the roundness of the steel pipe, the steel pipe finishing machine: exerts strong pressure on the long round pipe with poor roundness from the outside to meet the relevant specifications and use requirements.

Gantry mobile sensory straightening machine: used for straightening of steel cylindrical tubes.

Straight seam steel pipe flat chamfering machine: chamfer the end of straight seam steel pipe according to the specified blunt edge and groove angle. Improve the dimensional accuracy of steel pipes.

Steel pipe expansion machine: eliminate stress.

Check the penetration of the steel pipe under the specified pressure, 3000T hydraulic test machine: hydraulic test on the welded pipe. Eliminate welding stress and forming stress to ensure the performance of steel pipe.

It is possible to detect longitudinal and lateral defects and heat-affecting layer defects. Line ultrasonic testing equipment: 100% line ultrasonic non-destructive testing of all welds.

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