FAQ

Spiral welded steel pipe is manufactured by forming a steel coil into a cylindrical shape and welding the edges together along a continuous spiral seam. This production method allows large diameters and different wall thicknesses to be produced efficiently. Thanks to its high strength, long service life and competitive cost, spiral welded steel pipe is widely used in water transmission, wastewater, oil, gas and industrial pipeline projects.

The main advantages of spiral welded steel pipe are its dimensional flexibility, high pressure resistance and economic production in large diameters. The spiral weld distributes stresses evenly around the pipe, providing excellent structural performance under internal and external loads. In addition, the ability to choose different steel grades, wall thicknesses and coating systems makes spiral welded steel pipe a versatile solution for many infrastructure and industrial applications.

Our spiral welded steel pipe products are manufactured from certified steel coils and produced in accordance with relevant international and project-specific standards. Depending on the application and customer requirements, we can comply with commonly used norms for water, oil, gas and structural pipelines. All production, testing and documentation processes are carried out under a certified quality management system so that each spiral welded steel pipe can be traced and verified.

Every spiral welded steel pipe goes through strict quality control steps that include visual inspections, dimensional checks and non-destructive tests such as ultrasonic inspection of the weld seam. Where required, hydrostatic pressure tests are also performed to verify the pipe’s behavior under operating conditions. Only pipes that successfully pass all inspections are approved for coating, marking and shipment, ensuring that the installed spiral welded steel pipe system is safe and reliable.

To protect spiral welded steel pipe against corrosion and mechanical impacts, we offer a wide range of internal and external coating systems. On the outside, polyethylene, polypropylene, fusion-bonded epoxy and bitumen-based coatings are commonly used depending on soil conditions and installation method. On the inside, cement mortar lining or epoxy lining can be applied according to the type of water or fluid and project specifications. The right coating combination significantly increases the service life of the spiral welded steel pipe.

Spiral welded steel pipe can be used to transport drinking water, raw water, wastewater, storm water, district heating water, crude oil, refined products, natural gas and various industrial process fluids. The choice of steel grade, wall thickness, lining and coating system is made according to the characteristics of the medium and operating conditions. When correctly designed, spiral welded steel pipe provides a safe and long-lasting solution for many different types of media.

Yes, our production lines allow us to manufacture spiral welded steel pipe in a wide range of diameters, wall thicknesses and lengths. Based on your design pressure, route conditions and hydraulic calculations, we can propose and produce pipe classes that match the technical requirements of your project. This flexibility helps optimize both performance and cost while ensuring that the spiral welded steel pipe fits perfectly into the overall pipeline design.

To prepare a detailed offer for spiral welded steel pipe, we typically need the required diameters, wall thicknesses, steel grades, line pressure, type of medium, total quantities, pipe lengths, coating requirements and delivery terms. Route drawings, technical specifications and any applicable standards are also helpful. The more complete the project information, the more accurately we can design the spiral welded steel pipe solution and provide a competitive quotation.

Spiral welded steel pipes are packed and secured according to international transport rules and project-specific instructions. Pipes can be delivered with beveled or plain ends, with or without end caps, and stacked in bundles or single layers depending on diameter. During loading and unloading, suitable lifting equipment and slings are used to protect the coating and pipe ends. This careful handling ensures that the spiral welded steel pipe reaches the construction site ready for installation.

Yes, we provide technical support throughout the entire life cycle of a project that uses spiral welded steel pipe. Our engineering team can assist with pipe selection, wall thickness calculations, coating choices and installation details. During construction, we can offer guidance on handling, storage, field welding and testing procedures. By working closely with designers, contractors and end users, we help ensure that the spiral welded steel pipe system performs as intended and meets all project requirements.