INTRODUCTION TO WECO UNION
1). What is a Weco Union
2). Types of Weco Union
3). Components of Weco Union
4). Sizes of Weco Union
What is weco Union:
Weco union also known as weco hammer union is a wing type of union commonly used on the oil and gas platforms, lines and connection.
hammer union tools also helps for a quick assembly and dismantling of your production line.
Weco unions are one of the most commonly used unions in the oil and gas industry and is suitable for pressures up to 20,000 psi .
It usually used on both offshore and onshore operation , it can be connected to a hose , pipe or any transferable surface for supply of liquid ,gas, water, and some solid material
weco hammer union is built and manufactured in a way to reduce the difficult task of using flanges and passing stud bolt all the time.
Types of Weco hammer Union:
a). Threaded Weco hammer Union:
These types of Union comprises of a male or a female thread on the union, the threaded can be NPT threading or BSP threading , the threaded part of the union can be swaged into the threaded side of the flange ,king nipples, camlocks etc.
These threaded Weco hammer Union comprises of :
Weco hammer Union fig 50
Weco hammer Union fig 100
Weco hammer Union fig 200 or 206
Weco hammer Union fig 600
Weco hammer Union fig 1502
Threaded weco hammer union Available includes:
- 2" threaded weco hammer union fig 200
- 2" threaded weco hammer union fig 1502
- 3" threaded weco hammer union fig 100
- 3" threaded weco hammer union fig 200
- 4" threaded weco hammer union fig 100
- 4" threaded weco hammer union fig 200
- 4" threaded weco hammer union fig 600
- 5" threaded weco hammer union fig 100
- 5" threaded weco hammer union fig 50
b). Weld neck weco hammer Union:
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These type of Union are identified by it's schedule, some of them comprises of sch 40, Sch 80, sch 160 etc . the use of schedule determined the type of welding to be installed. If the pipe is schedule 40 definitely you will be required to use a schedule 40 weco union
Weld neck weco hammer union Available includes:
- 2" weldneck weco union fig 200 sch. 40,80
- 2" weldneck weco union fig 1502 sch. 40,80
- 3" weldneck weco union fig 100 sch. 40,80
- 3" weldneck weco union fig 200 sch. 40,80
- 4" weldneck weco union fig 100sch. 40,80
- 4" weldneck weco union fig 200 sch. 40,80
- 4" weldneck weco union fig 600 sch. 40,80
- 5" weldneck weco union fig 100 sch. 40,80
- 5" weldneck weco union fig 50 sch. 40,80
c). Weco Union cap and plug :
These type of union is manufactured to block or close the flow of liquid or solid particles after operation., the female part of the union is called the cap where the male part of the union is called the plug.
Weco Union cap and plug Available includes:
- 2" weco Union cap and plug fig 100,200,1502
- 3" weco Union cap and plug fig 100,200,1502
- 4" weco Union cap and plug fig 100,200,1502
- 5" weco Union cap and plug fig 100,200,1502
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Components of weco Union:
weco hammer union is made up of 2 components
a). The Male Weco Union :.
It comprises of the part without a lug handle , the male is coupled inside the female during operation.it also made up of brass, carbon steel or stainless steel
b). The Female Weco Union:
It Comprises of the lug handle part. it's the loosing or tightning parts. also made of brass, carbon steel or stainless steel
c). weco hammer seal ;
The seal is made up of elastic NBR of high quality. it help to stop leakages at the end tightning point. and the size of the union is determined by the size of the seal.
Sizes of Weco Union/ pressure:
Weco Union comprises of different Sizes and different pressure, the fig 100 indicates 1000 psi, fig 200 indicates 2,000 psi, fig 600 indicates 5,000 psi - 6,000 psi , while fig 1502 indicate pressure above 15,000 psi
a). 1" weco hammer union: it's a 25mm diameter union which can be fig 100 or 200
2" weco hammer union: a 50mm diameter, it also can be fig 100 ,fig 200, fig 600 and fig 1502
3"weco hammer union: a 75mm diameter, It also has a pressure range of fig 100, fig 200 , fig 600 , fig 1504
4"weco hammer union: a 100 mm diameter, with pressure of fig 100 , fig 200, fig 600 and fig 1502
6"weco hammer union: it's a 150mm diameter, with pressure range of fig 100, fig 200, fig 600, fig 1502.
8"weco hammer union : a 200 mm diameter , with pressure range of fig 100, fig 200,fig 600 and fig 1502
Common Questions and Answers on Weco Hammer Union
1). What is the purpose of the Hammer Union seal?
Hammer union seals are used in hammer union pipe joints to create flow paths and prevent leaks. The hammer union is designed to connect directly to the mud tank, eliminating the need to operate flange connections.
2).What does Figure 1502 represent?
Figure 1502, operating pressure 15,000 psi , The highest point is FIG 2202, operating at 15,000 psi in an acidic environment.
3). What is the difference between Figure 200 and Figure 206?
Details: Figure 206: Same as Figure 200, but with an O-ring in the machine groove on the male threaded half for additional sealing (Figure 206 does not seal when threaded to Figure 200 - Do not enter). For operation with air, water, oil or gas up to a non-emergency cold working pressure of 2,000 psi.
4). What is a lug joint?
Hammer lug joints are assembled from male and female parts and welded to the pipe. The male and female parts are secured with wing nuts. The nut has three grooves designed to be tightened by hammering.
6,000 pounds per square inch Figure 602 602 Hammered Union, 6,000 PSI The hammered unions are very visible and all have factory markings.
6).What is the pressure level of the 1003 hammer union?
Figure 1003 C&C is an additional connector designed for systems where pipe alignment is an issue and requires angle adjustment up to 71/2° from center (15° total). Recommended for high pressure water, oil, slurry or gas with an operating pressure not to exceed 10,000 PSI
RELATED ARTICLE ABOUT WECO UNION
Weco Unions are designed to provide a quick and reliable method for connecting various components of the wellhead equipment, such as valves, pipes, and chokes.
They are known for their robustness and ability to withstand high pressure and harsh operating conditions.
Types of Weco Unions used in the oil and gas industry, including:
Fig. 602: Used for low-pressure applications, typically up to 1,000 psi.
Fig. 1002: Suitable for medium-pressure applications, generally up to 2,000 psi.
Fig. 1502: Designed for high-pressure applications, commonly used in fracturing and well testing operations, with pressure ratings up to 15,000 psi.
Fig. 2002: Similar to Fig. 1502 but with higher pressure ratings, often used in well testing and cementing operations, with pressure ratings up to 20,000 psi.
Fig. 2202: Used in extreme high-pressure applications, such as offshore drilling, with pressure ratings up to 22,000 psi.
Each type of Weco Union is designed to meet specific pressure and operational requirements in the oil and gas industry.
The components of a typical Weco Union include:
Male Sub: This is the external threaded component that connects to the female connection of another union or equipment.
Female Sub: This is the internally threaded component that connects to the male connection of another union or equipment.
Nut: The nut screws onto the male sub to secure the union in place and create a tight seal between the male and female subs.
Seal Ring: This is a rubber or elastomeric ring that sits inside the groove of the female sub. When the union is assembled, the seal ring compresses to create a pressure-tight seal between the male and female subs.
Wing Nut: In some designs, a wing nut is used instead of a regular nut for easier tightening by hand without requiring tools.
These components work together to create a reliable and pressure-tight connection between two pieces of wellhead equipment in the oil and gas industry.
Material for manufacture weco union
Weco Unions are typically manufactured using materials that provide durability, corrosion resistance, and high-pressure capability, as they are often used in demanding oil and gas industry applications. Common materials used for manufacturing Weco Unions include:
Carbon Steel: Provides strength and durability, commonly used for lower pressure applications.
Alloy Steel: Offers higher strength and better corrosion resistance compared to carbon steel, suitable for medium to high-pressure applications.
Stainless Steel: Provides excellent corrosion resistance, making it suitable for harsh environments and high-pressure applications.
Brass: Used for low-pressure applications where corrosion resistance is important but lower strength is acceptable.
Duplex Stainless Steel: Offers enhanced corrosion resistance and strength, often used in offshore and subsea applications.
The choice of material depends on factors such as the pressure rating, environmental conditions, and specific requirements of the application.
how to use weco union:
Using a Weco Union involves the following steps:
Prepare the Components: Ensure that the male and female subs, as well as the seal ring, are clean and free of any debris or damage.
Assemble the Components: Insert the seal ring into the groove of the female sub. Then, screw the male sub into the female sub until they are snugly connected.
Hand Tighten: Use a wrench, if necessary, to hand tighten the nut onto the male sub. Make sure the union is securely fastened but avoid over-tightening, as this could damage the components or the seal.
Pressure Test: Once the union is assembled, perform a pressure test to ensure that there are no leaks. Gradually increase the pressure to the desired level and check for any signs of leakage around the union.
Monitor and Maintain: Regularly inspect the Weco Union for any signs of wear, damage, or leaks. Replace any worn or damaged components promptly to maintain the integrity and reliability of the connection.
By following these steps, you can effectively use a Weco Union to create a secure and pressure-tight connection between two pieces of wellhead equipment in the oil and gas industry.
Advantages of Weco union:
Reliability: Weco Unions are known for their reliability in creating secure and pressure-tight connections between various components of wellhead equipment. This reliability helps prevent leaks and ensures safe operation in demanding oil and gas industry environments.
Versatility: Weco Unions come in various types and sizes, allowing for flexibility in design and application. They can accommodate different pressure ratings and are compatible with a wide range of wellhead equipment, valves, pipes, and chokes.
Ease of Installation: Weco Unions are designed for quick and easy installation, reducing downtime and labor costs during assembly and maintenance activities. They typically require minimal tools and expertise to assemble, making them convenient for field operations.
Durability: Constructed from high-quality materials such as carbon steel, alloy steel, stainless steel, or brass, Weco Unions are durable and capable of withstanding harsh operating conditions, including high pressures, corrosion, and abrasion.
Field Serviceability: In the event of maintenance or repairs, Weco Unions can be disassembled and reassembled quickly in the field, minimizing downtime and operational disruptions.
Standardization: Weco Unions adhere to industry standards, making them widely recognized and accepted across the oil and gas industry. This standardization simplifies procurement, inventory management, and compatibility between different equipment and suppliers.
Overall, the advantages of Weco Unions contribute to improved efficiency, safety, and cost-effectiveness in oil and gas wellhead operations.







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