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Tongue Face 

The Tongue and Groove faces of this flanges must be matched. One flange face has a raised ring (Tongue) machined onto the flange face while the mating flange has a matching depression (Groove) machined into it's face.

Tongue-and-groove facings are standardized in both large and small types. They differ from male-and-female in that the inside diameters of the tongue-and-groove do not extend into the flange base, thus retaining the gasket on its inner and outer diameter. These are commonly found on pump covers and Valve Bonnets.

Tongue-and-groove joints also have an advantage in that they are self-aligning and act as a reservoir for the adhesive. The scarf joint keeps the axis of loading in line with the joint and does not require a major machining operation.

Stainless steel blind flange with tongue face(TF)

Material: ASTM A182 F304/F304L, F316/F316L, F321, F347

Standard: ANSI B16.5

Size: 1/2"-48"

Class:150-2500

Manufacture: by forging

Type: blind flange, blind cover

Package: protect cover with flange, plywooden cases

Certificate: MTC or 3.1 certificate

Port of departure: Shanghai, China

Origin: Jiangyin, China

www.guoshengflange.com

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