Threaded Union

Stainless steel union fittings and Brass Threaded Union suppliers in UAE

Threaded Union

The unions can be produced in different grades. An ss union fitting is designed with superior chemical content. This gives the fittings enhanced tolerance to corrosive and reducing media. The brass threaded union has solid strength and good anti-microfouling properties. In some cases, brass performs better than stainless steel unions. The copper threaded union is ductile but weaker compared to the other two grades.

What is standard threading in stainless steel union fittings?

Threading of stainless steel union is one of the oldest methods of joining them in the system. The process of threading in the robust stainless steel union fittings starts by forging the material at high temperatures. The forged material is very strong and allows the material to be formed in different shapes.

The forged steel union is subjected to forming and rolling procedures. During this stage, the fitting is subject to various tests and processes. The stainless steel threaded union is generally designed in UN/UNF, NPT/NPTF, BSPP, BSPT, metric parallel, and metric tapered. Each of the stainless steel pipe union types has its own characteristics and features.

Are SAE and NPT the same in the carbon steel union?

SAE and NPT are two standards of carbon steel union. Both these standards differ from each other on some specifications. An NPT thread is self-sealing and has a 60 degrees angle. SAE threaded union fitting is non-self-sealing and requires O ring gaskets to seal them. They have a 45 degree angle.

How much pressure can stainless steel union hold?

The class and threaded union dimensions play a key role in determining the pressure the union can hold. The stainless steel union is designed to work in pressure classes of 6000, 9000, and class 3000 threaded union. Generally, the union is rated to hold a maximum pressure of 1378 bar.

What is a stainless steel dielectric union?

A stainless dielectric union is a special fitting used in a piping to isolate the connection of a range of dissimilar metals. So when joining a copper pipeline to stainless steel a copper to stainless steel dielectric union is set up between both of them. This allows the setup to hold the two metal devices to be together via the dielectric union stainless steel to copper. Here an elastomeric rubber gasket is used to seal the connection to prevent water mix-up. The stainless steel to copper dielectric union also uses a plastic composite metal to isolate the material. In many cases, when both the material come in contact, they tend to corrode. The same process can be used between brass and stainless steel using the stainless steel to brass dielectric union.


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What is a threaded union?

A threaded union is a fitting that unites two pieces of equipment. These fittings can be attached and later detached without causing any deformation. A steel union fitting allows for easy installation, and any connection that requires a seal is done with a union fitting. The screwed union is widely used due to their economical cost and versatility. This makes it very demanding in the market. The 1 inch threaded union helps in metering and regulating devices in the plumbing industry. These unions can be coated with protective layers, as seen in the galvanized pipe union to give them better tolerances.

Threaded Union Fittings Specification And Sizes

Threaded union specifications

Carbon steel union and copper to stainless steel dielectric union in Class 2000/ 3000, check ss union fitting price list in Dubai

ASME B16.11 Threaded Union Price List

Threaded Union Price Per Piece Screwed Union Price in USD Bsp Threaded Union Price in UAE Dirham
1 Inch Galvanized 300# Malleable Iron Threaded Union Per Piece US $ 55.94 UAE Dirham 205.47
1/2 Inch Threaded NPT Union, Lead Free Brass, 125 PSI Per piece US $ 14.36 UAE Dirham 52.74
Union – 150# NPT Threaded 304 Stainless Steel 1/4 Inch Per Piece US $ 13.38 UAE Dirham 49.15
2 inch Ductile Iron Union NPT Threaded Class 300 Per Piece US $ 105.63 UAE Dirham 387.98
1-1/2 in. Threaded NPT Union 316 3000# Forged Stainless Steel Per Piece US $ 176.26 UAE Dirham 647.41

Please note: The price may vary as per the location, you may contact the verified manufacturers & suppliers listed on this page.

How Does A Threaded Union Work?

Because a union detaches, you can separate it and affix each half to the end of one of the pipes being joined separately. Unions, like couplings, can have slip joints for glueing or soldering or threaded inlets. After assembling the union’s two halves, connect the pipes by bringing the union together and screwing the nut on one side to the threads on the other. When fully tightened, this central connection is leakproof even without the use of plumbing tape or thread compound.

How To Install A Threaded Pipe Union?

Threaded Pipe Union Installation

Threaded Union can be installed as shown in above picture

Tired of buying costly forged steel union from stockists? Contact leading steel union fitting manufacturers for wholesale prices in Middle East

Various Types of Threaded Union

Threaded Unions

Threaded Unions

Threaded Union Fitting

Threaded Union Fitting

ASME B16.11 Threaded Unions

ASME B16.11 Threaded Unions

Brass Threaded Unions

Brass Threaded Unions

Bsp Threaded Unions

Bsp Threaded Unions

Threaded Barrel Unions

Threaded Barrel Unions

Class 3000 Threaded Unions

Class 3000 Threaded Unions

Copper Threaded Unions

Copper Threaded Unions

Threaded Copper Union Fitting

Threaded Copper Union Fitting

Female Threaded Unions

Female Threaded Unions

Galvanized Threaded Unions

Galvanized Threaded Unions

Mss-sp-83 Unions Threaded

Mss-sp-83 Unions Threaded

Npt Threaded Unions

Npt Threaded Unions

Reducing Threaded Unions

Reducing Threaded Unions

Stainless Steel Threaded Unions

Stainless Steel Threaded Unions

Check galvanized pipe union & threaded union dimensions, weight, standard & isometric symbol

Threaded Union Weight

Class 3000 threaded unions weight chart

Threaded Union Connection

  • MSS-SP-83 (Class Unions)
  • ASME B16.39 (Malleable Iron Unions)
  • ASME B16.11 (Socket Welding and Threaded),

Threaded Pipe Union Dimensions

Threaded union dimensions

Threaded Coupling Vs Union

Copper Threaded Coupling

  • The primary distinction between a coupling and a union is that a coupling is used to connect pipe to pipe or pipe to a swedge. A union is used to join and disassemble a piping system component (such as a steam trap or control valve) for maintenance or replacement.
  • The union is more expensive than the coupling. When simply joining pipes, the cheapest item should be used. When you need to disassemble the piping to remove an item, you must use the more expensive union.
  • Couplings are used to connect pipe in pipe racks. To remove items for repair, use unions at the steam trap or control valve manifolds.

Available Material of Threaded Pipe Union

Stainless Steel

Pressure Class: 3000#, 6000# 9000#

Grades:

  • 304
  • 304L
  • 316
  • 316L
  • 317
  • 317L
  • 310
  • 321
  • 347
  • 347H
  • 904L

ASTM Standard: ASTM A182

ASME Standard: ASME SA182

Mainly used in: Chemical Industry, Petroleum Industry

Stainless Steel Threaded Union
Duplex / Super Duplex Threaded Pipe Union

Duplex / Super Duplex

Pressure Class: 3000#, 6000# 9000#

Grades:

  • Duplex 2205
  • Super Duplex 2507
  • F51
  • F53
  • F55
  • UNS S31803
  • UNS S32205
  • UNS S32550
  • UNS S32750
  • UNS S32760
  • UNS S32950

ASTM Standard: ASTM A182

ASME Standard: ASME SA182

Mainly used in: Domestic water, Cement Industries

Carbon Steel Reducing

Pressure Class: 2000 / 3000 / 6000 LBS

Grades:

  • A105
  • A350 LF1
  • A350 LF2 CL1/CL2
  • A350 LF3 CL1/CL2
  • A694 F42
  • A694 F46
  • A694 F48
  • A694 F50
  • A694 F52
  • A694 F56
  • A694 F60
  • A694 F65
  • A694 F70

ASTM Standard: ASTM A105 / A350 LF2 / A694

ASME Standard: ASME SA105 / SA350 LF2 / SA694

Mainly used in: Energy Industry, Refining Industry

Carbon Steel Reducing Threaded Union
Alloy Steel Female Threaded Union

Alloy Steel

Pressure Class: 2000 / 3000 / 6000 LBS

Grades:

  • A182 F1
  • A182 F5
  • A182 F9
  • A182 F11
  • A182 F12
  • A182 F22
  • A182 F91
  • A182 F92

ASTM Standard: ASTM A182

ASME Standard: ASME SA182

Mainly used in: Pulp & Paper Indusry, Power Plant Industry

Copper Nickel

Pressure Class: 2000 / 3000 / 6000 LBS

Grades:

  • Copper Nickel 90/10
  • Copper Nickel 70/30

ASTM Standard: ASTM B467

ASME Standard: ASME SB467

Mainly used in: Oil and Gas Industry, Chemical Industry

Copper Nickel Npt Threaded Union
Nickel Alloy Threaded Barrel Union

Nickel Alloy

Pressure Class: 2000 / 3000 / 6000 LBS

Grades:

  • NICKEL 200
  • NICKEL 201
  • MONEL 400
  • MONEL K500
  • INCONEL 600
  • INCONEL 601
  • INCONEL 625
  • INCOLOY 800
  • INCOLOY 800H
  • INCOLOY 825
  • HASTELLOY C22
  • HASTELLOY C276
  • HASTELLOY B2

ASTM Standard: ASTM B564

ASME Standard: ASME SB564

Mainly used in: Paper Industries, Aerospace Industry

Dielectric union stainless steel to copper, stainless steel threaded union as per ASME B16.11

Available Standards of Dielectric Union

  • BSP
  • BSPP
  • NPT

Required tools to join dielectric unions

  • Plumbers tape
  • Pipe wrench
  • Adjustable wrench
  • Hacksaw
  • Tube cutter
  • Soldering torch