Corrosion-resistant Steel Flange
High-Performance Corrosion-Resistant Flanges for Aggressive Environments
SSM manufactures corrosion-resistant steel flanges designed to withstand the most demanding industrial conditions. Our flanges are engineered from superior alloys including 316L, duplex 2205, and super duplex 2507, providing exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking.
Corrosion-Resistant Steel Flange Specifications
1. Material Grades & Properties
| Alloy | UNS No. | PREN Value* | Key Features | Max Temp. (°C) |
|---|---|---|---|---|
| 316L Stainless | S31603 | 25-28 | Excellent general corrosion resistance | 800 |
| Duplex 2205 | S32205 | 35-40 | Superior chloride resistance | 300 |
| Super Duplex 2507 | S32750 | 40-45 | Extreme pitting resistance | 300 |
| Alloy 20 (Carpenter 20) | N08020 | 30-35 | Outstanding acid resistance | 400 |
| Hastelloy C276 | N10276 | 65-70 | Exceptional chemical resistance | 1093 |
*PREN = Pitting Resistance Equivalent Number (Cr + 3.3Mo + 16N)
2. Standard Specifications
| Parameter | Specifications |
|---|---|
| Size Range | 1/2" - 60" (DN15 - DN1500) |
| Pressure Ratings | Class 150 - 2500 (PN6 - PN100) |
| Flange Types | Weld Neck, Slip-On, Blind, Lap Joint, Threaded |
| Standards | ASME B16.5, ASME B16.47, EN 1092-1, MSS SP-44 |
| Face Types | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint) |
3. Corrosion Resistance Comparison
| Environment | 316L | Duplex 2205 | Super Duplex 2507 | Alloy 20 |
|---|---|---|---|---|
| Seawater | Good | Excellent | Outstanding | Excellent |
| Chlorides | Fair | Excellent | Superior | Excellent |
| Sulfuric Acid | Limited | Good | Good | Outstanding |
| Hydrochloric Acid | Poor | Fair | Fair | Excellent |
| Caustic Solutions | Excellent | Excellent | Excellent | Excellent |
Manufacturing Excellence
Advanced Production Capabilities
Precision CNC Machining (±0.02mm tolerance)
Automated Welding for consistent quality
Heat Treatment for optimal microstructure
Non-Destructive Testing (UT, RT, PT, MT)
Surface Treatments
Electropolishing for enhanced corrosion resistance
Pickling & Passivation to restore passive layer
Sandblasting for uniform surface finish
PTFE Coating for chemical resistance
Quality Assurance
Stringent Testing Protocols
Pitting Corrosion Testing (ASTM G48)
Intergranular Corrosion Testing (ASTM A262)
Hardness Testing (Rockwell & Brinell)
Positive Material Identification (PMI)
Hydrostatic Testing (1.5x rated pressure)
Certifications
NACE MR0175/ISO 15156 for sour service
PED 2014/68/EU for pressure equipment
ASME B16.5 & B16.47 compliant
ISO 9001:2015 certified quality system
Industry Applications
Oil & Gas
Offshore platforms (seawater systems)
Subsea pipelines
Refinery sour gas service
LNG processing equipment
Chemical Processing
Acid storage tanks
Chemical reactors
Phosphoric acid production
Chlor-alkali plants
Specialty Applications
Desalination plants
Flue gas desulfurization
Pulp & paper bleaching
Pharmaceutical processing
Custom Solutions
Specialty Flange Options
Clad/Lined Flanges (explosion-bonded or weld-overlay)
Insulating Flange Kits for cathodic protection
Large Diameter Flanges (up to 120"/DN3000)
High-Pressure Designs (up to 2500#/PN100)
Material Enhancements
Nitrogen-Enhanced Grades for improved PREN
Low-Temperature Impact Tested (-196°C)
Solution Annealed for optimal corrosion resistance
Custom Alloy Blends for specific environments
Why Choose SSM Corrosion-Resistant Flanges?
✔ In-House Metallurgical Expertise for material selection
✔ Full Product Traceability from melt to final product
✔ Global Logistics Network for timely delivery
✔ Technical Support for corrosion engineering
✔ Competitive Pricing with volume discounts
Request Your Quote Today
Our engineering team is ready to assist with:
Corrosion resistance evaluations
Material selection guidance
Custom flange design
Application-specific recommendations
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