4 inch weld neck flange manufacturer

## Trusted Steel Pipe Solutions Since 1983 For over four decades, we’ve crafted precision steel pipe fittings for global industries. Our 35,000 m² facility combines tradition with cutting-edge automation to serve oil & gas, construction, and marine projects. ### Why Partner With Us? **1. Four Decades of Specialized Expertise** Years of refining production techniques ensure reliable fittings, flanges, and pipes that meet ASTM/EN standards. **2. Quality Backed by Global Certifications** Every product undergoes rigorous checks to comply with ISO 9001, CE, and GOST-R requirements—no compromises. **3. Eco-Consistent Manufacturing** Automated 100-meter painting lines and energy-saving sandblasting systems reduce waste while boosting efficiency. **4. Bulk Order Excellence** Produce 30,000+ tons yearly with a dedicated logistics team. Large-scale orders ship on time, anywhere. From raw materials to final delivery, advanced robotics and human craftsmanship work together to build industrial-grade durability. Over 30,041 tons of fittings reach clients annually through streamlined workflows designed for high-volume precision.

## Reliable Solutions for Industrial Flange Needs When precision and durability matter in high-pressure systems, 4 inch weld neck flanges deliver unmatched performance. As a trusted **4 inch weld neck flange manufacturer**, JS FITTING specializes in crafting components that meet rigorous industry demands. Our products are engineered for seamless integration in oil, gas, and petrochemical applications, where safety and reliability are non-negotiable. What sets us apart? Every 4 inch welding neck flange undergoes strict quality checks, using high-grade materials like ASTM-certified stainless steel and carbon steel. Customization is at the heart of our service—whether adjusting dimensions, pressure ratings, or surface finishes, we tailor solutions to fit your project’s exact requirements. With certifications including ASME B16.5 and API 6A, our flanges meet global standards for performance and safety. For industries requiring robust connections in pipelines, refineries, or chemical plants, JS FITTING’s 4 inch weld neck flanges offer leak-proof security under extreme conditions. Our decades of expertise as a leading **4 inch weld neck flange manufacturer** ensure you receive components built to last, backed by technical support from design to installation. Trusted by engineers worldwide, our solutions combine innovation with practical durability. The right flange not only connects pipes—it safeguards operations.