SIZES: ½” to 60”
CLASS: 150 to 2500; 2500PSI to 15000PSI
TYPE: Expander Weld Neck Flange
SCHEDULE: S10, S20, S30, S40, S STD, S60, S XS, S80, S100, S120, S140, S160, S XXS
STANDARD: ASME B16.5 | API 6A
MATERIAL GRADES:
- Nickel Alloys: Incoloy (800, 800H, 800HT, 825), Inconel (600, 625), Monel 400
- Specialty Alloys: Alloy 20, Hastelloy (C22, C276), Copper nickel (Cu-Ni), Titanium (Gr. 1, 2, 3), Urea Grade
- Duplex & Super Duplex: F51, F53, F55, F44
- Stainless Steel: AISI 304, 316, 321, 347
- Carbon Steel: ASTM A105, A350 LF2, A516 Gr.70, A694 F60–F65
Hunter Steel Flanges provides precision-made Expander Flanges, engineered to increase the pipe size at the flange connection without requiring an additional reducer or welding. These flanges are primarily used in pump and compressor connections, where an upgrade in line size is required for flow optimization.
Expander flanges serve as an excellent alternative to a separate weld neck flange and concentric reducer, offering a compact and cost-effective solution. They are widely used in chemical, petrochemical, water treatment, and oil & gas industries for smooth transitions from smaller to larger pipe diameters. Manufactured to ASME B16.5 and other global standards, our expander flanges ensure structural integrity, reliable sealing, and precise dimensional compatibility.
