A105N RTJ Weld Neck Flanges Delivered to Portuguese Industrial Project

High-pressure process and utility piping systems across Portugal demand robust, precision-sealed flange connections to maintain leak-free integrity under sustained operating pressures. Haihao Group has completed production and dispatch of A105N RTJ weld neck flange units for a Portuguese industrial customer, sized at 5 inch, Class 1500 with SCH160 hub thickness, engineered for heavy-duty high-pressure pipeline service.

5 inch Class 1500 A105N RTJ weld neck flange SCH160 normalized carbon steel ASME B16.5 for Portuguese industrial pipeline

Product Specification Table

Forged from ASTM A105N normalized carbon steel, this A105N RTJ weld neck flange is a grade widely specified for industrial pressure boundary components across European markets. Normalization heat treatment refines the internal grain structure, delivering consistent tensile strength and reliable impact resistance across a broad range of process operating temperatures. The ring type joint sealing face is machined to tight ASME B16.5 dimensional tolerances, ensuring dependable metal-to-metal sealing when paired with matching RTJ gaskets — a critical performance feature for Class 1500 high-pressure piping systems.

The 5-inch configuration features a SCH160 hub wall thickness, matched to heavy-wall process pipe dimensions to minimize stress concentration at the weld joint. The weld neck design distributes operational stress away from the flange face and into the pipe weld seam, extending the overall service life of the connection compared to slip-on alternatives. Every A105N RTJ weld neck flange passes full dimensional verification, surface quality inspection and material traceability checks prior to packing to confirm full alignment with project specifications.

For European industrial clients including this Portuguese operator, every A105N RTJ weld neck flange shipment is accompanied by complete supporting documentation, including EN 10204 3.1 material test certificates and dimensional inspection records. Additional non-destructive testing and custom certification packages can also be arranged to meet specific project quality and acceptance requirements.

If you are sourcing high-pressure carbon steel flanges for your next pipeline project in Portugal or other European markets, reach out to our engineering team to share your specifications. We manufacture a full range of A105N RTJ weld neck flange configurations in multiple sizes and pressure classes, tailored to match your project’s piping design requirements.