Flange Materials
From carbon steel to exotic superalloys, our materials meet every service condition. Comprehensive specifications, certifications, and guidance to select the right grade for your system.
Material Selection Guide
Why Material Choice Matters
Every material has a temperature ceiling, a pressure floor, and a corrosion limit. Choose wrong, and the flange fails in the field. Choose right, and your piping system runs for decades.
Full Specifications
Composition, mechanical properties, and pressure-temperature ratings for every grade
Temperature Ready
Coverage from -425°F cryogenic to 2000°F high-temperature service
Industry Certified
ASTM, ASME, and specialty certifications for regulated environments
Complete Coverage
Eight Material Categories
Carbon Steel
Standard: ASTM A105/A350 LF2
Grades: A105, A266, A516-70
Temperature: -20°F to 800°F
General-purpose flanges for most industrial applications. Economical, widely available, and proven in service across countless systems.
View Details →Stainless Steel
Standard: ASTM A182 F304/F316
Grades: F304L, F310, F316, F316L, F347
Temperature: -320°F to 800°F
Superior corrosion resistance for food, beverage, pharmaceutical, and chemical processing. Lower carbon grades (L series) reduce chromium carbide precipitation.
View Details →Alloy Steel
Standard: ASTM A182 F11/F22/F91
Grades: F11, F22, F5, F9, F91
Temperature: Up to 1100°F
Chrome-molybdenum and other alloyed steels optimized for power generation, steam systems, and high-temperature pressure service.
View Details →Duplex & Super Duplex
Standard: ASTM A182 F51/F53
Grades: S31803, S32750, 2507
Temperature: -40°F to 600°F
High strength, excellent corrosion resistance. Ideal for subsea pipelines, deep-sea production, and aggressive chemical environments.
View Details →Nickel Alloys
Standard: ASTM B564
Grades: N06625, N06102, N06242
Temperature: -425°F to 2000°F
Inconel, Monel, and Hastelloy variants for extreme environments. LNG cryogenic service through molten salt thermal loops.
View Details →Galvanized Flanges
Standard: ASTM A153/HDG
Grades: Carbon Steel + Zinc
Temperature: -20°F to 800°F
Hot-dip galvanized carbon flanges for outdoor, waterworks, and atmospheric corrosion protection. Zinc layer sacrifices itself to protect base metal.
View Details →Epoxy Coated
Standard: FBE/AWWA C550
Grades: Carbon Steel + FBE
Temperature: -20°F to 140°F
Fusion-bonded epoxy coating for potable water systems. NSF-61 certified for drinking water compliance. Interior and exterior protection.
View Details →Zinc Plated
Standard: ASTM B633
Grades: Carbon Steel + Zinc plating
Temperature: -20°F to 800°F
Electroplated zinc finish for moderate corrosion protection and decorative appeal. Lower cost than galvanizing, suitable for sheltered applications.
View Details →Decision Framework
How to Choose the Right Material
Operating Temperature
Identify your minimum and maximum service temperature. Flange material must remain ductile and strong across the entire range.
Chemical Environment
Assess the fluid or gas contacting the flange. Corrosion-resistant alloys prevent pitting, stress corrosion cracking, and general loss of thickness.
Pressure Rating
Mechanical properties degrade at temperature. Match material grade to ASME B16.5 pressure-temperature tables for your duty.
Corrosion Protection
Coating options (galvanizing, epoxy, zinc plate) extend service life in wet or chemical-rich atmospheres.
Code Compliance
Regulated industries (potable water, cryogenic, pressure vessels) mandate specific materials and certifications. Verify upfront.
Standards & Certifications
Built to Standard
Material selection is not arbitrary. Standards bodies have established chemical composition, mechanical properties, and testing requirements to ensure safety and reliability.
Primary Material Standards
ASTM A105
Carbon steel for piping flanges
ASTM A350 LF2
Low-temperature carbon steel
ASTM A182 F304/F316
Stainless steel for pressure components
ASTM A182 F11/F22/F91
Alloy steel for elevated temperature
Specialty Standards
ASTM B564
Nickel alloys for corrosion resistance
ASTM A153
Hot-dip galvanizing of steel
AWWA C550
Epoxy coating for water systems
NACE MR0175
Sour service (H2S) compliance
Unsure Which Material Fits Your Service?
Submit your operating conditions, pressure, temperature, and fluid type. We'll recommend the right material, confirm pressure-temperature compliance, and provide a firm quote.