ASME B16.5 Forged Carbon Steel Raised Face Blind Flange - China Supplier & Factory

ASTM A105N refers to A105 material that has undergone normalizing heat treatment. The "N" suffix indicates a normalized condition, which improves toughness and relieves internal stresses, making it suitable for more demanding pressure applications.

Stainless steel flanges (such as ASTM A182 F304 or F316) are preferred in corrosive environments, high-temperature applications, or where hygiene is critical (e.g., food, pharmaceutical, chemical industries). Carbon steel is typically used in general-purpose, lower-cost applications where corrosion resistance is less critical.

Alloy steel flanges offer superior strength and creep resistance at elevated temperatures. Grades such as F91 and F92 are commonly used in power generation and high-temperature steam pipelines where carbon steel or standard stainless steel would fail to meet performance requirements.

RF (Raised Face) is the most common sealing face, concentrating bolt load on a smaller area for better sealing. FF (Flat Face) is used when connecting to cast iron or other brittle flanges to prevent cracking. FTJ (Full Tongue and Groove Joint) provides a self-aligning, leak-resistant seal ideal for high-pressure and hazardous fluid applications.

Yes. ASTM A182 F51 is a duplex stainless steel (UNS S31803 / S32205) that combines the properties of austenitic and ferritic stainless steels, offering excellent corrosion resistance — particularly against chloride stress corrosion cracking — along with high strength.

ASTM A694 covers carbon and alloy steel forgings for pipe flanges used in high-pressure transmission service. The F grades (F42, F46, F56, F60, F65) indicate the minimum yield strength in ksi — higher numbers represent higher strength, allowing for use in higher-pressure pipeline systems.