Renny – India’s Leading ERW Pipe Manufacturer

As the top ERW pipe manufacturer in India, Renny is renowned for its state-of-the-art production facilities, advanced welding technology & stringent quality assurance. Our high- strength, durable & precision-engineered ERW pipes are designed to meet the toughest industry standards, ensuring seamless performance across various industrial applications.

With a commitment to sustainability, innovation & global excellence, Renny continues to set new benchmarks in the ERW pipe manufacturing industry, delivering trusted piping solutions for infrastructure, construction, scaffolding & formwork, oil & gas, firefighting, Agricultural implementation & other key sectors across India & also in international markets.

Renny ERW Pipes & Tubes – Engineered for Excellence, Built for Success, through Precision Bend Pass Processes

Renny ERW pipes & tubes are crafted with precision engineering and cutting-edge forming technology, ensuring superior bend pass accuracy, circularity, wall thickness uniformity & welding strength. Our advanced quality control processes guarantee exceptional durability, seamless performance & long-term reliability. With a strong focus on innovation and sustainability, Renny ERW pipes & tubes are the preferred choice for industries demanding high-strength, corrosion-resistant, and high-performance piping solutions.

The Bend Pass Process in ERW Pipe Manufacturing

In Electric Resistance Welded (ERW) pipe manufacturing, the “bend pass” or forming process is a crucial step that shapes a flat steel strip into a cylindrical pipe before welding. This process ensures precision, structural integrity & seamless weldability, ultimately contributing to the quality and durability of the final product. A “bend pass” (or forming pass) refers to a stage where the steel strip is shaped into a cylindrical form, and the benefits include achieving desired circularity, uniform wall thickness, and preparation for welding.

Key Stages of the Bend Pass Process

1. Starting Material Preparation

The process begins with a flat steel strip, typically uncoiled from a large steel coil. This strip is straightened and prepared for the forming stage to ensure a smooth and defect-free manufacturing process.

2. Forming Rolls Application

The flat strip is then guided through a series of forming rolls or rollers. These specialized rollers are strategically positioned to gradually shape the material into a tubular form. The precise alignment of these rolls is critical in maintaining uniformity and accuracy.

3. Gradual Bending into Shape

As the strip progresses through the rollers, it undergoes a controlled bending process, slowly taking on a cylindrical shape. The two edges of the strip move closer together, forming a longitudinal seam. This bending process is carefully monitored to prevent defects and ensure the correct pipe dimensions.

4. Preparation for Welding

Once the strip achieves its cylindrical form, the edges are precisely aligned in preparation for welding. In ERW pipe manufacturing, a high-frequency electric current is used to heat and fuse the edges, creating a strong, continuous weld without the need for filler material. Proper edge alignment at this stage ensures a robust and defect-free weld.

5. Quality Control and Inspection

After welding, the ERW pipe undergoes rigorous quality control checks. This includes visual inspections to detect surface irregularities, ultrasonic testing to ensure weld integrity, and dimensional verification to confirm compliance with industry standards. High-quality bend pass execution directly contributes to the reliability and performance of the final pipe.

Significance of the Bend Pass Process

• Ensuresprecision shaping of the steel strip into a uniform cylindrical
• Maintainsaccurate edge alignment for optimal welding
• Reducesmaterial stress and defects, improving pipe
• Enhancesthe efficiency of the ERW process, leading to cost-effective
• Achievesdesired circularity and uniform wall thickness, crucial for high-performance

Renny is India’s leading ERW pipe manufacturer, recognized for its cutting-edge technology, precision engineering, and unwavering commitment to quality. By mastering the bend pass process, Renny has achieved exceptional product durability and enhanced production

efficiency. As industries demand high-performance and sustainable ERW pipes, Renny continues to drive innovation in forming and welding techniques, setting new benchmarks in the ERW pipe manufacturing industry and reinforcing its position as an industry leader.