8-inch Blind Flange Overview

The 8-shaped blind flange is designed for testing pipeline pressure and facilitates maintenance. Its shape resembles an "8," with one half being a blind flange and the other half a flange ring.

Similar products include plug plates, as well as gasketed flange pipe fittings.

Features of 8-inch Blind Flange

The shape resembles an "8," featuring a small hole in the center for rotation, playing a crucial role in testing pipeline pressure and facilitating maintenance.

Specification Model

1/2“~24"

Pressure Grade

150LB、300LB、600LB、900LB、1500LB、2500LB ;

Sealing Type

Rounded Face (RF), Flat Face (FF), Mid-Face (MFM), Concave Face (FM), Convex Face (M), Tongue and Groove (TG)

Common Materials

Carbon Steel Flanges: ASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70

Stainless Steel Flanges: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8

Alloy Flanges (Alloy Steel): ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ

Production Process

Insert a strip between the flange cover and flange ring, followed by welding.

Procurement Recommendations

1: Recommend purchasing from a reputable 8-character blind flange manufacturer, which should have a certain production scale.

2: Manufacturers of flanges need to provide material test reports for 8-inch blind plates and other relevant documents.

3: 8-inch blind flanges must have corresponding specification and model embossed markings and identification.