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300 LB BL Flanges Stainless Steel 304 Flanges

300 LB BL flanges are used to close the pipe system,it is similar to plugs and caps.Stainless steel 304 flanges are the most used stainless steel flanges as SS304 have excllent functions and reasonable price.

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300lb BL flanges are commonly used in the piping systems for a closed function.Stainless steel 304 flanges is the most used type of stainless flanges,the material SS304 has excellent function and reasonable price.


A blind flange is a solid flange . The purpose of these is to block off a section of pipe or a nozzle on a vessel that is not used. (A nozzle is typically a pipe coming out of a vessel and is usually flanged so it can be connected to valves or piping). Many times a nozzle will be blanked off with a blind flange for pressure tests in a plant, or simply because the customer does not need all the nozzles that were supplied on the tank.



Raised face, flat face, and ring joint (RTJ) face seals.

The first two are more common in basic sealing applications, with RTJ being the face of choice for higher pressure applications.



Shape Blind Flange (BL)
Size Range 1/2″ – 48″/ DN15 – DN1200
Pressure Rating Class 150, 300, 600, 900, 1500, 2500lb
Standard ASME B16.5, ASME B16.47 Series A/B, EN 1092-1, API 605, MSS SP-44, DIN 2627, DIN 2527, DIN 2558, DIN 2576, DIN 2641, DIN 2655, DIN 2656, DIN2573
Carbon Steel ASTM A105 / A105N, ASTM A350 LF2/LF3, ASTM A694 F42 / 46 / 56 / 60 / 65, P235GH, P265GH, P280GH, P355GH
Alloy Steel ASTM A182 F11 / 12 / 5 / 9 / 91 / 92
Stainless Steel ASTM A182 F304/304L/304H, 316/316L, 321, 310S, 317,347,904L, 1.4404, 1.4437.
Duplex Stainless Steel ASTM A182 F51, F53, F44




Blind flanges are used to seal the end of piping systems or pressure vessel openings. They are commonly used for testing the flow of gas or liquid through a pipe or vessel, in addition to allowing for easy access to the pipe in case work must be done inside the line.


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