L415 Straight Seam Submerged Arc Welded Steel Pipe

L415 Straight Seam Submerged Arc Welded Steel Pipe Adopts JCOE Steel Pipe Forming, With One Weld Seam And Submerged Arc Welding Process, With Specifications Ranging From 325mm To 1420mm. When The Diameter Of The Straight Seam Submerged Arc Welded Pipe Is Greater Than 914.4, The Standard Stipulates That The Steel Pipe Is Allowed To Have Two Straight Welds. The Straight Seam Submerged Arc Welded Pipe Products Comply With The Low-pressure Fluid Steel Pipe Standard GB/T3091-2008, The Petroleum And Natural Gas Pipeline Execution Standard GB/T9711.1 (2) -1997, And The Welded Structural Steel Pipe Execution Standard ASTM A252.

The Production Process Of L415 Straight Seam Submerged Arc Welded Steel Pipes Is Flexible And Can Produce Any Specification And Wall Thickness Within The Production Range. The Production Efficiency Is Lower Than That Of High-frequency Straight Seam Welded Steel Pipes And Spiral Welded Steel Pipes.

The Major Advantage Of L415 Straight Seam Submerged Arc Welded Steel Pipes Is That They Can Produce Specifications And Models Of High-frequency Steel Pipes, Spiral Steel Pipes, And Even Seamless Steel Pipes That Cannot Be Produced.

The Production Cost Of L415 Straight Seam Submerged Arc Welded Steel Pipes Is Higher Than That Of High-frequency Steel Pipes And Spiral Steel Pipes, But There Is A Lot Of Room For Price Discounts Compared To Seamless Steel Pipes.

L415 Straight Seam Submerged Arc Welded Steel Pipes Can Produce High-frequency Steel Pipes And Materials That Cannot Be Produced By Spiral Steel Pipes. For Example, High-frequency Steel Pipes Are Usually Produced In Commonly Used Specifications In China And Are Mass-produced For Inventory. The Materials Used Are Usually Q235B, Q345B, And Other Harder Steel Plate Materials. Currently, High-frequency Equipment And Spiral Equipment Cannot Be Produced Domestically.

L415 Straight Seam Submerged Arc Welded Steel Pipe Is Widely Used In Heavy-duty Steel Structure Engineering, Fluid Pipeline Engineering, And Foundation Pile Driving Engineering In China.

The Heat Treatment After Welding Of L415 Straight Seam Submerged Arc Welded Steel Pipes Can Reduce Welding Residual Stress, And The Higher The Heat Treatment Temperature, The Better The Residual Stress Effect.

The Post Weld Heat Treatment Of L415 Straight Seam Steel Pipes Can Also Improve The Stress Corrosion Resistance Of Large-diameter Steel Pipes. The Higher The Post Heat Treatment Temperature, The More Significant The Improvement In The Stress Corrosion Resistance Of L415 Straight Seam Steel Pipes.

L415 Straight Seam Submerged Arc Welded Steel Pipes Need To Undergo Tests Such As Water Pressure, Bending, And Flattening, With Certain Surface Requirements. The Usual Delivery Length Is 4-10m, And It Is Often Required To Be Delivered To A Fixed Length (or Multiple Length).