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China Slip-On Pipe Flange Class 150 RF - Reliable Suppliers and Factory for Industrial Pipeline Connections
Material Grade
Carbon Steel
ASTM A105 / A105N, ASTM A350 LF2 / LF3, ASTM A694 F42 / 46 / 56 / 60 / 65
Stainless Steel
ASTM A182 F304/304L/304H, 316/316L, 310S, 317, 347, 904L, ASTM A182 F51, F53, F44
Alloy Steel
ASTM A182 F11 / 12 / 5 / 9 / 91 / 92
Sealing Face
RF, FF, FTJ
Frequently Asked Questions
What is the difference between ASTM A105 and A105N?
ASTM A105N is the normalized version of A105 carbon steel. Normalizing is a heat treatment process that improves the grain structure and enhances the material's toughness and impact resistance, especially in low-temperature environments.
Which stainless steel grades are best for corrosion resistance?
For superior corrosion resistance, 316/316L is excellent due to its molybdenum content. For extreme environments, Duplex grades like F51 and F53, or Super Austenitic 904L, offer the highest resistance to pitting and stress corrosion cracking.
What do RF, FF, and RTJ sealing faces stand for?
RF stands for Raised Face, the most common type. FF stands for Flat Face, used mainly with cast iron equipment. RTJ (or FTJ in some contexts) stands for Ring Type Joint, designed for high-pressure and high-temperature services.
When should Alloy Steel F11 or F22 be used?
Alloy steels like F11 and F22 are specifically designed for high-temperature and high-pressure applications, such as power plants and petrochemical refineries, where standard carbon steel might lose strength.
Are these materials compliant with international standards?
Yes, all materials listed follow ASTM (American Society for Testing and Materials) standards, ensuring they meet strict chemical and mechanical property requirements for industrial safety.
Can you provide low-temperature carbon steel?
Yes, ASTM A350 LF2 and LF3 are specifically designated as low-temperature carbon steels, suitable for service in colder climates or specialized refrigeration processes.