Steel union fitting can be divided into socket weld and screw type, according to the thread type, there are normally NPT union and BSP union.

We stock abundant of BSP pipe fittings for our Southeast Asia market, they are mostly 90 degree elbow, threaded coupling, cap, bushing, equal tee and cross. All of them are mostly in material of carbon steel, alloy steel and stainless steel.

BSP Union Dimensions

Usually we manufacture the Class 3000 threaded union according to MSS SP-83. The size is available in 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″ and 3″.

Class 3000 Threaded Union Dimensions

Carbon Steel Threaded Fittings

ASTM A105, A694 F52, F60, F65, F70, A350 LF2, LF3

Stainless Steel BSP Fittings

ASTM A182 F304/304L/F304H, F316/316L, F310, F317, F321, F309

Duplex Steel BSP Threaded Fittings

ASTM A182 F51, F53, F55, F56, F57

Alloy Steel Threaded Pipe Fittings

ASTM A182 F1, F5, F9, F11, F12, F22, F91

What is BSP Thread?

There are two types of threads as following:

Parallel (straight) threads, British Standard Pipe Parallel thread (BSPP; originally also known as British Standard Pipe Fitting thread/BSPF and British Standard Pipe Mechanical thread/BSPM), which have a constant diameter; denoted by the letter G.

Taper threads, British Standard Pipe Taper thread (BSPT), whose diameter increases or decreases along the length of the thread; denoted by the letter R.

BSP Threads

How do you Identify BSP and NPT Pipe Fittings?

UN/UNF and BSPP pipe fittings have parallel threads, and NPT/NPTF and BSPT fittings have tapered threads. Usually it is hard to identify by looking, mostly we use the Go/no go Gauge tool whatever in factory or end user’s hand. As a responsible manufacturer and supplier of BSP Threaded Fittings, we inspect Union one by one and take a video for customer’s reference. Make a good quality and provide right product are our keyword.

Threaded Union Features

1. Male and Female.
2. Excellent Corrosion Resistance.
3. High Tensile Strength.
4. Durability.
5. Weldability.
6. Formability.
7. Dimensional accuracy.

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We also called C70600 as 90/10 Cupro Nickel Fittings, which means properties are 90% copper, 10% nickel and small amounts of iron and manganese added.

Copper Nickel is widely used in marine applications due to their excellent resistance to seawater corrosion, high inherent resistance to biofouling and good fabricability.

NPT Union Dimensions

NPT Union Dimensions

Types Copper Nickel CU-NI 90/10 Pipe Fittings

• Equal and Reducing Cross
• Long and Short Radius Elbow
• 90 and 45 Degree Elbow
• Equal and Reducing Tee
• Copper Nickel 90/10 Union and Cap
• Threaded Nipple and Bushing
• Concentric and Eccentric Reducer
• CU-NI 90/10 Full and Half Coupling

What is Tolerance for Copper Nickel Union Fittings?

Steel Pipe Union Weight

Steel Pipe Union Weight

Material & Grades of Threaded Union

Carbon Steel Pipe Union

ASTM A105, A694 F52, F60, F65, F70, ASTM A350 LF2, LF3

Stainless Steel NPT Union

ASTM A182 F304/304L/304H, F316/316L, F310, F317, F321, F309, F947

Cooper Nickel Pipe Fittings

ASTM B151 UNS C70600 / C70610 / C70620

Export Country of Copper Nickel Flanges and Fittings

Asia: Vietnam, Singapore, India, Indonesia, Philippines, Malaysia, Thailand, Kazakhstan

Africa: Nigeria, Madagascar,Ghana, Kenya, Angola, Mauritius, Uganda

Middle East: Saudi Arabia, Qatar, Israel, Egypt, Oman, Jordan

Latin America: Uruguay, Peru, Chile, Brasil, Ecuador, Colombia, Argentina, Panama

Oceania: Papua New Guinea, Australia, New Zealand, Solomon

Europe: Greece, UK, Poland, Ukraine, France, Spain, Italy, Switzerland, Germany

Certificates for Copper NPT Fittings

ISO 9001 certificate

CE certificate

EN10204 B3.1 MTC

Third party inspection report

ABS, BV, DNV and API

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We offer the complete range of forged fittings including socket weld fittings and threaded fittings. Like Elbows, Tees, Crosses, Couplings, Caps, Hexagonal Nipple, Threaded Plugs, Union and Lateral. These pipe fittings are fabricated by best original material which buy from famous and big steel mill.

Forged Fittings Specification

Standard: ASME B16.11, SH3410, JIS B2316, BS3799

Size: 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″

Pressure: 3000LB, 6000LB, 9000LB

Types: Socket Weld Fittings and Threaded Pipe Fittings

Carbon Steel Grades

ASTM A105, A694 F52, F60, F65, F70, A350 LF2, LF3

Stainless Steel Grades

ASTM A182 F304/304L/F304H, F316/316L, F310, F317, F321, F309

Duplex Steel Grades

ASTM A182 F51, F53, F55, F56, F57

Stainless Steel Union Dimensions

Weight Chart of Steel Pipe Union

The unions are available in small dimensions which below 3 inch so that the weight is light. So we can send them by courier or air, the weight can be used to check freight. The weight chart can be used in socket weld and threaded union.

Quality Assurance of Class 3000 Pipe Fittings

Forged steel fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. After the processing down, we will do below inspection.

Visually examined surface and marking.

Measure the size and thickness.

Test the properties of stainless steel.

Pipe Union Vs Pipe Coupling

The main difference between a coupling and a union lies in their connection and disconnection features.

A coupling is designed to permanently connect two pipes together. Once installed, it is not meant to be removed easily, as it usually involves threading or welding. Couplings are ideal for applications where the pipe connection does not need to be taken apart frequently.

A union, on the other hand, is made for easy assembly and disassembly. It consists of three parts – two end pieces and a central nut. This design allows the pipes to be disconnected without rotating them, which makes unions perfect for systems that require maintenance, inspection, or replacement of components.

In summary, couplings create a permanent joint, while unions allow for quick disconnection and reassembly.

Package of Stainless Steel Threaded Union

1. Putting them into small plastic bags.
2. Lining up threaded unions in cartons.
3. Packing cartons in wooden cases.
4. Sticking shipping mark on outside of packages.

Certificates for Forged Steel Fittings and Flanges

ISO 9001 certificate

CE certificate

EN10204 B3.1 MTC

Third party inspection report

ABS, BV, DNV and API

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As a top professional threaded pipe fittings suppliers in China, our steel pipe coupling, union, tee, elbow, cap are exported to many countries and area.

Why more and more customers purchase forged fittings from us, especially BSP threaded pipe union? maybe the answer is truly attitude and service. Which based on the attractive price and good quality.

What is Threaded Pipe Fittings?

Threaded Pipe Fittings

They are connecting with the pipe by thread, usually used for pipe diameter which below 4 inch. What are they? Elbow, Tee, Coupling, Plug, Bushing, Cap, Union and Nipple.

Threaded Pipe Union Dimensions

Threaded Pipe Union Dimensions

Standard: ASME/ANSI B16.11, BS3799, MSS SP-83

Diameter Range: 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″,4”

Thread Type: PF, PT, NPT, BSPP and BSPT

Material Grades of NPT Pipe Fittings

Carbon Steel: ASTM A105, A694 F52, F60, F65, F70, A350 LF2, LF3

Stainless Steel: ASTM A182 F304/304L, F304H, F316/316L, F310, F317, F321

Alloy Steel: ASTM A182 F1, F5, F9, F11, F12, F22, F91

Duplex Steel: ASTM A182 F51, F53, F55, S 31803, S 32205, S 32550, S 32750, S 32760

Threaded Union Weight

Threaded pipe union weight is available in Class 3000 lbs with BPS and NPT Threads.

Carbon Steel Threaded Pipe Fittings

Package

We marked all Carbon Steel Threaded Pipe Fittings with Grade, Lot No, Size, Standard and Pressure. The workers sleeved 1 inch BSP Union ASTM A105 into plastic bag individually, put all of them into cartons and wooden cases, then bundled package with nylon rope.

Clear labels are tagged on the outside of the package for easy identification of the quantity and product. Great care is taken during operation and transportation.

Inspection

1. Visual the surface of threaded union. Such as dents, die marks, porosity, undercuts.
2. Check the marking” 1″ BSPP ASTM 3000LB ASTM A105 Z168″
3. Measure dimensions. Such as outside diameter, wall thickness, thread length.
4. Test the thread by go/no gauge of carbon steel threaded pipe union

Advantages

• Good Quality
• Fast Delivery
• Safe Package
• Abundant Stock
• Reasonable Price
• Reliable Shipment

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MSS SP 83 is the specification for Class 3000 socket weld union which cover size tolerance, marking, material in carbon steel, alloy & stainless steel.

1 1/2 inch Socket Weld Union, ASTM A182 F53 Duplex Steel Pipe Fittings, ASME B16.11 Forged Steel Fittings are in hot sale with attractive price and quality.

We produces high pressure socket weld fittings for connecting pipes or other fittings together in many industrial processes that no leakage can be permitted. Socket welding provides a strong and efficiency joint to support this function. And limited by its manufacturer standard, it is more suitable for small diameters application below 4 inch.

Class 6000 Unions in duplex steel A182 F53 have excellent corrosion resistance and high strength so that they are high demanded in chemical industries such as pulp and paper mills. Duplex steel fittings are solid and lasting, even in the most demanding circumstances, they can perform well.

Steel Pipe Union Fitting Dimensions

Socket Weld Unions Dimensions

Standard: ASME/ANSI B16.11, BS3799, MSS-SP-83

Diameter Range: 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″,4”

Type: Socket Weld Union and Threaded Union.

Material Grades of Pipe Union ASME

Duplex Steel Union

ASTM A182 F51, F53, F55, S 31803, S 32205, S 32550, S 32750, S 32760

Stainless Steel Union

ASTM A182 F304/304L, F304H, F316/316L, F310, F317, F321

Alloy Steel Pipe Coupling

ASTM A182 F1, F5, F9, F11, F12, F22, F91

Carbon Steel Socket Weld Union

ASTM A105, A350 LF2, LF3, A694 F52, F60, F65, F70

MSS SP 83 Socket Weld Union Weight

MSS SP 83 Specification covers the rating, marking, weight, tolerance. The weight unit for 3000# socket weld union as following is kg/pc.

Package of Duplex Steel Socket Weld Fittings

Marked socket weld fittings with Size, Pressure, Grade, Standard and Heat No.

All duplex steel union fittings is surfaced with oil before packing.

Sleeved forged steel fittings into plastic bag individually.

Packed them in carton and wooden cases, then bundled packages with nylon rope.

Stick shipping mark on the outside of the package for easy identification.

Inspection of Steel Pipe Unions

Visual the surface of socket weld union body.

Check the marking ” 1 1/2″ SW Union ASTM A182 F53 ASME B16.11 Z168″

Measure dimensions of class 3000 union. Such as diameter, thickness, and size of the socket.

Why Choose Us for Steel Pipe Fittings

• ISO and CE certified quality
• Short delivery
• Safe package
• Abundant stock
• Reasonable price
• One stop service
• Full specification

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Stainless Steel Pipe Union Dimensions

Stainless Steel Pipe Union Dimensions

Standard: MSS-SP-83

Diameter: 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″

Pressure Ratings: 3000LB, 6000LB

Type: Socket Weld Union and Threaded Union

Grades: ASTM A182 F304/304L/304H, F316/316L, F310, F317, F321, F947, F51, F53, F55, F56, F57

Class 3000 Threaded Union Weight

The weight is kg/pcs and available in Class 3000lbs BPS and NPT Union.

How Do We Pack 304 Stainless Steel Union

We marked Stainless Steel 304 Threaded Fittings with Grades, Lot No, Size, Thread, Standard and Pressure. Before shipping, use anti-rust oil on all forged stainless steel fittings. Our workers sleeved NPT Union SS 304 into plastic bag individually, wrapped with water-proof material, then packed into cartons and wooden cases, finally bundled with nylon rope.

Quality Assurance of NPT Union SS 304

Visual and touch examined the surface and marking.

Go/no go gauge tests the NPT thread.

Precise measure the diameter, wall thickness, thread length to conform to MSS-SP-83.

Material test to make sure 310 Stainless Steel material is qualified

Mill test certificates are meet to BS EN10204-3.1.

Quality Assurance of NPT Union SS 304

Screwed Union Pipe Fittings Features

Durable

Connect pipes

High corrosion resistance

Easy installation and disassemble.

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