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Blind Flange
| Flange type | Sliding type; Welding neck, sleeve welding, blind hole, thread, splicing; Long welded neck; Hole Convex, planar and RTJ of all flanges; |
| Materials | ASTM A105; A350 LF2; A694 F42，F46，F52，F56，A182 F12 / F22 / F5 / F9 / F91; A182 F304 / F304L / F316 / F316L等 |
| Size | 1/2 “~60”, as the customer’s requirements; |
| Pressure | Classification：150 300 400 600 900 1500 2500; PN6，PN10，PN16，PN25，PN40，5K，10K，16K，20K，30K |
| Standard | ASME B16.5，ASME B16.47，MSS SP43，EN1092 ，DIN，JIS; |
A blind flange is a circular plate with all the relevant bolt holes, but no central hole, and because of this characteristic the flange is used to close the end of a piping system and the opening of a pressure vessel.
It also allows easy access to the inside of the pipeline or container after sealing and must be reopened.
From the point of view of internal pressure and bolt loading, blind flanges, especially larger flanges, are the most powerful flange types.
However, most of these stresses are bending types close to the center, and because there is no standard inner diameter, these flanges are suitable for higher pressure temperature applications. Blind flanges are commonly used in petrochemicals, plumbing, public services and water engineering.
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