SSAW welded pipe production porcess

At CONTINENTAL STEEL, we pride ourselves on our expertise in the production of SSAW (Spiral Submerged Arc Welding) steel pipes. As pioneers in this field, our knowledge and experience set us apart from other suppliers in China. Here is an overview of the production process for SSAW steel pipes, utilizing advanced submerged arc welding technology.

Spiral Submerged Arc Welding Process

Material Inspection:

Inspect raw steel coils to ensure they meet the required specifications and quality standards.

Coil Preparation:

Prepare the steel coil for processing, ensuring it is clean and free of any defects.

Hot Rolled Coil:

Use high-quality hot rolled coils as the base material for the pipes.

Sub Pinch Roll:

Feed the coil into the sub pinch roll to begin shaping the steel strip.

Flattening:

Flatten the steel strip to ensure uniform thickness and prepare it for further processing.

Shear:

Cut the steel strip to the required width for the pipe production.

Skelp End Welding:

Weld the ends of the steel strips together to form a continuous length suitable for pipe production.

Leveling:

Level the steel strip to remove any residual stresses and ensure a smooth, flat surface.

Drive Rolls:

Pass the leveled strip through drive rolls to maintain consistent tension and alignment.

Side Trimming:

Trim the edges of the steel strip to achieve precise dimensions.

Edge Milling:

Mill the edges of the strip to prepare them for welding, ensuring a clean and smooth surface.

Forming Rolls:

Form the steel strip into a spiral shape, creating the initial pipe structure.

Inside Welding:

Perform internal welding using submerged arc welding technology to create a strong, continuous weld.

Outside Welding:

Complete the welding process by performing external welding, ensuring the pipe's integrity and strength.

Ultrasonic Inspection:

Conduct ultrasonic inspections to detect any internal defects or irregularities in the weld.

Plasma Cutting:

Use plasma cutting to cut the pipe to the desired length with precision.

Slag Removing:

Remove any slag or debris from the welding process to ensure a clean surface.

Primary Visual Inspection:

Perform an initial visual inspection to check for any visible defects or issues.

X-Ray Inspection:

Use X-ray inspection to further examine the welds for any hidden defects.

End Facing:

Face the ends of the pipe to ensure they are smooth and meet dimensional specifications.

Hydrostatic Testing:

Conduct hydrostatic tests to verify the pipe's ability to withstand pressure.

Final Visual Inspection:

Perform a thorough visual inspection in the testing lab to ensure the pipe meets all quality standards.

Customer Inspection:

Allow customers to inspect the pipes to verify they meet their requirements.

Weighing and Stenciling:

Weigh the pipes and stencil the necessary markings for identification and traceability.

Pipe Storing and Shipping:

Store the finished pipes in a secure location and prepare them for shipment to customers.

By following this comprehensive production process, CONTINENTAL STEEL ensures that our SSAW steel pipes meet the highest standards of quality and reliability, making them suitable for a wide range of applications.