SS321H Stainless Steel Flanges
Product Overview
SS321H flanges are titanium-stabilized austenitic stainless steel pipe connectors, engineered to withstand extreme high-temperature and corrosive working conditions. The titanium additive prevents chromium carbide precipitation, eliminating intergranular corrosion risks even after long-term exposure to temperatures up to 870°C. Manufactured with precision machining and strict dimensional control, these flanges ensure leak-free pipe connections for critical industrial systems.
Key Features & Benefits
High-Temperature Durability: Maintains structural integrity and sealing performance in continuous high-heat operations, ideal for furnace and boiler piping.
Superior Corrosion Resistance: Resists intergranular, pitting, and general corrosion in acidic, alkaline, and humid industrial environments.
Precision Engineering: Machined to tight tolerances with smooth sealing surfaces, ensuring perfect alignment and leak-proof connections.
Excellent Weldability: Compatible with TIG, MIG, and arc welding processes; no post-weld heat treatment required for most applications.
Versatile Design: Available in multiple types to match diverse piping layout needs, with customizable options for special projects.
Technical Specifications
| Parameter | Specification Range |
|---|---|
| Types | WN (Weld Neck), SO (Slip On), BL (Blind), PL (Plate), TH (Threaded), LJ (Lap Joint) |
| Pressure Class | Class 150, 300, 600, 900, 1500, 2500; PN 10, 16, 25, 40, 63 |
| Size Range | 1/2" - 72" (DN15 - DN1800) |
| Sealing Face | RF (Raised Face), FF (Flat Face), M (Male), FM (Female), TG (Tongue & Groove) |
| Chemical Composition (Typical) | C: 0.04–0.10; Cr: 17.0–19.0; Ni: 9.0–12.0; Ti: 5×C–0.70; Fe: Balance |
| Mechanical Properties | Tensile Strength ≥ 515 MPa; Yield Strength ≥ 205 MPa; Elongation ≥ 40% |
| Heat Treatment | Solution Annealed & Pickled |
Typical Applications
Petrochemical and refinery piping systems
Thermal and nuclear power plant heat exchangers
High-temperature boiler and furnace pipelines
Aerospace and marine engineering fluid systems
Pharmaceutical and food processing sanitary piping
Chemical processing equipment and reactors
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