End Caps Butt Welded Seamless Pipe Polished ISO

RUNXING’s Stainless Steel 304/316 Elliptical Tank Head Dished End Caps are high-performance pressure vessel components, designed to meet the strict demands of international industrial applications. As a core product of our brand, these Stainless Steel End Caps Butt Welded Seamless are precision-manufactured with SUS304 and SUS316 stainless steel, featuring butt-welded and seamless structures, polished surfaces, and full compliance with ISO standards. These Stainless Steel Elliptical Tank Head End Caps serve as critical sealing and structural components for tanks, pipes, and pressure vessels, ensuring leak-proof performance, corrosion resistance, and long-term durability. Our product integrates advanced manufacturing technology and strict quality control, making it the preferred choice for global buyers seeking reliable, high-quality pipe cap solutions.

Technical Specifications

Core Material Specifications

• Primary Materials: Stainless Steel 304 (SUS304) and Stainless Steel 316 (SUS316), with optional SUS201 for specific low-corrosion scenarios. 304 stainless steel offers excellent general corrosion resistance, while 316 stainless steel provides enhanced resistance to chloride, acid, and alkaline environments, suitable for harsh industrial conditions.

• Material Features: Austenitic stainless steel with exceptional tensile strength, ductility, and work-hardening properties, ensuring the end caps can handle extreme pressures and temperatures without deformation.

Dimensional & Structural Specifications

• Shape: Elliptical dished end, with a standard 2:1 ratio of major to minor axis, ensuring economical design and uniform stress distribution. The dish radius is approximately 90% of the outside diameter, and the knuckle radius is about 17% of the outside diameter.

• Diameter Range: 89mm - 10000mm, covering small to large-sized tanks and pipes.

• Thickness Range: 2mm - 100mm, with thickness determined by design pressure, medium, temperature, and volume. For常压 tanks under 5m³, thickness is 4.0-5.0mm; for large industrial tanks over 50m³, thickness is ≥12mm.

• Connection Type: Butt-welded, ensuring seamless integration with tanks and pipes, reducing leakage risks and improving structural stability. Seamless processing is available for high-pressure applications.

• Surface Treatment: Polished finish (mirror polished or matte polished), meeting sanitary standards and enhancing corrosion resistance. Optional sand blasting or pickling treatment is available based on application needs.

Performance Specifications

• Corrosion Resistance: 304 stainless steel resists weak corrosive media (water, air, neutral solutions); 316 stainless steel resists chloride, seawater, and chemical corrosives, suitable for marine and chemical applications.

• Pressure Bearing Capacity: Designed for moderate to high pressure applications, with stress uniformly distributed across the elliptical shape. For承压 tanks (0.1-0.6MPa), thickness ranges from 6-12mm; for pressures over 0.6MPa, thickness is 10-20mm or more.

• Temperature Range: -20℃ to 500℃, suitable for both low and high-temperature working environments.

• Reduction Ratio: Approximately 10%, ensuring optimal forming performance and structural integrity.

Application Scenarios

Our Stainless Steel 304/316 Elliptical Tank Head Dished End Caps are widely used in various industrial fields, thanks to their excellent corrosion resistance, pressure-bearing capacity, and sanitary performance. They serve as essential Cap Ends for tanks, pipes, and pressure vessels, bringing practical value to buyers in different industries: