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Ansi Asme B16.11 A105 Forged Union Fittings

hjfitting limited
hjfitting limited
Country/Region: China
Tel: +86-311-89640267,+8615632184107

Ansi Asme B16.11 A105 Forged Union Fittings

Country/Region china
Company hjfitting limited
Categories Flanged Butterfly Valve
Update 2017-08-01 10:26:22
Telephone +86-311-89640267,+8615632184107
ICP License Issued by the Chinese Ministry
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Ansi Asme B16.11 A105 Forged Union Fittings

A union, similar to a coupling, allows the convenient future disconnection of pipes for maintenance or fixture replacement. In contrast to a coupling requiring solvent welding, soldering, or rotation (for threaded couplings), a union allows easy connection and disconnection, multiple times if...
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  • Description

  • A union, similar to a coupling, allows the convenient future disconnection of pipes for maintenance or fixture replacement. In contrast to a coupling requiring solvent welding, soldering, or rotation (for threaded couplings), a union allows easy connection and disconnection, multiple times if needed. It consists of three parts: a nut, a female end and a male end. When the female and male ends are joined, the nut seals the joint by pressing the two ends tightly together. Unions are a type of very compact flange connector.

    Dielectric unions, with dielectric insulation, separate dissimilar metals (such as copper and galvanized steel) to prevent galvanic corrosion. When two dissimilar metals are in contact with an electrically conductive solution (ordinary tap water is conductive), they form an electrochemical couple which generates a voltage by electrolysis.

    When the metals are in direct contact with each other, the electric current from one to the other also moves metallic ions from one to the other; this dissolves one metal, depositing it on the other. A dielectric union breaks the electrical path with a plastic liner between its halves, limiting galvanic corrosion.

    Rotary unions allow mechanical rotation of one of the joined parts, while resisting leakage.

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