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Forged Carbon Steel RF Blind Flange Suppliers in China - High Quality from Factory, ASME B16.5 Standards
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Forged Carbon Steel RF Blind Flange Suppliers in China - High Quality from Factory, ASME B16.5 Standards

A blind flange is a solid, non-perforated flange designed to close the end of a pipeline or temporarily isolate a section of the pipeline system. This essential component is connected to a compatible flange using bolts and provides exceptional sealing performance. Ideal for high-pressure and toxic medium applications, blind flanges are commonly used in various scenarios including pipeline maintenance, reserved interfaces, and more, Our blind flanges, manufactured in China, feature a simple structure that ensures easy installation and can be disassembled and reused multiple times. They are widely utilized across multiple industries such as chemical, petroleum, and power generation, **Quick Details**, | **Parameter** | **Details** |, |---------------------|-----------------------------------------------|, | Outside Diameter | 1/2~48 (DN15~DN1200) |, | Class | PN2.5、PN6、PN10、PN16、PN25、PN40、PN63、PN100
Class 150, 300, 600, 900, 1500, 2500lb |, | Standards | EN 1092-1, ANSI/ASME B16.5, DIN 2527, JIS B2220 |, As a leading supplier and factory in the industry, we ensure that our blind flanges meet the highest standards of quality and performance, making them the perfect choice for your pipeline engineering needs

    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 are the common applications for ASTM A105 and A350 LF2 carbon steel?

    ASTM A105 is the standard specification for carbon steel forgings for piping applications operating at ambient and higher-temperature service. ASTM A350 LF2 is specifically designed for low-temperature service, offering excellent notch toughness down to -50°F.

    What is the difference between F304 and F316 stainless steel grades?

    While both are austenitic stainless steels, F316 contains molybdenum, which significantly improves corrosion resistance, especially against chlorides and pitting. F304 is the standard "18/8" stainless steel, widely used for general corrosion resistance.

    When should ASTM A182 alloy steel grades like F11 or F22 be selected?

    ASTM A182 alloy steels (such as F11, F12, F5, F9, and F91) are alloyed with elements like chromium and molybdenum. They are selected for high-temperature and high-pressure services because they maintain strength and resist creep at elevated temperatures.

    What do the sealing face abbreviations RF, FF, and FTJ stand for?

    These abbreviations refer to flange facing types: RF stands for Raised Face, which concentrates pressure on a smaller gasket area; FF stands for Flat Face, used mainly with flat gaskets on cast iron or lower-pressure connections; FTJ (often referred to as RTJ - Ring Type Joint) uses a metal ring gasket for high-pressure and high-temperature services.

    What are duplex stainless steel grades F51 and F53?

    F51 (Duplex 2205) and F53 (Super Duplex 2507) are duplex stainless steels that feature a mixed microstructure of austenite and ferrite. They offer twice the strength of standard austenitic stainless steels and superior resistance to stress corrosion cracking and pitting.