A flange cover, also known as a blind flange or blind plate, is a type of flange without a hole in the middle, mainly used to seal pipeline plugs. Its production materials are diverse, mainly including the following:

1、 Carbon steel

Types: including various models such as ASTM A105, 20 #, Q235, 16Mn, etc.

Characteristics: Carbon steel flange covers have strong compressive strength and good elasticity, suitable for pipeline systems under various pressure and temperature conditions.

2、 Stainless steel

Types: There are mainly ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8 and other models.

Features: Stainless steel flange covers have excellent corrosion resistance and are suitable for pipeline systems that require resistance to chemical corrosion and high temperature environments.

3、 Alloy steel

Types: including ASTM A182 F1, F9, F11, F12, F22, F91 and other models, as well as materials such as 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, etc.

Features: The alloy steel flange cover combines high strength and good corrosion resistance, making it suitable for high-pressure, high-temperature, and highly corrosive pipeline systems.

In addition to the main materials mentioned above, the production of flange covers may also involve other special materials to meet the needs of specific industries or applications. For example, in industries such as petroleum and chemical, it may be necessary to use special alloy materials with higher corrosion resistance and compressive strength.

In addition, the selection of production materials for flange covers is also influenced by their sealing surface form, connection method, and usage environment. Therefore, when selecting production materials for flange covers, multiple factors need to be considered comprehensively to ensure that they can meet the needs of practical applications.