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Hammer unions are one of the most versatile and reliable pipe connection solutions in the oil and gas industry, widely recognized for their ability to quickly connect and disconnect pipe sections without the need for special tools. Known for their strong sealing performance and easy installation, hammer unions are ideal for demanding applications where safety, durability, and leak-proof performance are critical.
Asian Sealing Products manufactures high-quality hammer unions using forged cast raw materials, engineered to meet specific service and operating requirements. Our hammer unions consist of three precision-machined components: the wing nut, male union, and female union, which form a tight, pressure-resistant seal when assembled. Available in sizes ranging from 1 inch to 12 inches with pressure ratings up to 20,000 PSI cold working pressure, our unions are designed for high-pressure and high-performance environments.
We also specialize in manufacturing hammer unions for sour gas service, strictly adhering to industry standards such as API RP-14E and NACE MR-01-75, ensuring superior corrosion resistance, safety, and long-term reliability in harsh oilfield conditions.
Industry standards
API RP-14E & NACE MR-01-75
Usage of industries
Oil and Gas
Chemical Industry
Power Generation
Mining
Marine
Hammer Union
Hammer unions are one of the most versatile and reliable pipe connection solutions in the oil and gas industry, widely recognized for their ability to quickly connect and disconnect pipe sections without the need for special tools. Known for their strong sealing performance and easy installation, hammer unions are ideal for demanding applications where safety, durability, and leak-proof performance are critical.
Asian Sealing Products manufactures high-quality hammer unions using forged cast raw materials, engineered to meet specific service and operating requirements. Our hammer unions consist of three precision-machined components: the wing nut, male union, and female union, which form a tight, pressure-resistant seal when assembled. Available in sizes ranging from 1 inch to 12 inches with pressure ratings up to 20,000 PSI cold working pressure, our unions are designed for high-pressure and high-performance environments.
We also specialize in manufacturing hammer unions for sour gas service, strictly adhering to industry standards such as API RP-14E and NACE MR-01-75, ensuring superior corrosion resistance, safety, and long-term reliability in harsh oilfield conditions.
Industry standards
API RP-14E & NACE MR-01-75
Usage of industries
Oil and Gas
Chemical Industry
Power Generation
Mining
Marine
Request A Quote
By submitting this form, you agree to the privacy policy and terms of use.
Hammer Union Types
Hammer unions are available in a wide range of types designed to handle different pressure ratings, temperature ranges, and service conditions in oil and gas operations. Each type is categorized by its size, connection profile, and pressure class, ensuring compatibility with specific pipeline systems. Asian Sealing Products offers Hammer Unions in both threaded and butt-welded end connections.
Hammer unions are available in a wide range of types designed to handle different pressure ratings, temperature ranges, and service conditions in oil and gas operations. Each type is categorized by its size, connection profile, and pressure class, ensuring compatibility with specific pipeline systems. Asian Sealing Products offers Hammer Unions in both threaded and butt-welded end connections.
Fig 50 Union
Fig 100 Union
Fig 200 Union
Fig 206 Union
Fig 211 Union
Fig 400 Union
Fig 600 Union
Fig 602 Union
Fig 1002 Union
Fig 1003 Union
Fig 1502 Union
Fig 2002 & 2202 Union
Your Trusted Partner for Reliable Sealing Solutions
Convenience
Quick and easy connection and disconnection without special tools
Security
Robust wing nut design for secure and vibration-resistant locking
Pressure Resistance
Designed to withstand high working pressures up to 20,000 PSI
Thermal Tolerance
Suitable for low to high temperature operating environments
Strength
Made from high-strength forged steel for superior mechanical strength
Hammer Union Applications
Hammer unions are widely used in the oil and gas industry for creating secure, leak-proof connections in high-pressure fluid handling systems. These fittings are ideal for connecting pipes, hoses, manifolds, and flow lines in drilling, completion, production, and well servicing operations. Common applications include mud lines, cementing lines, fracturing systems, acidizing units, water injection systems, and high-pressure test lines. Designed to perform reliably in extreme pressure and temperature conditions, hammer unions are trusted for both onshore and offshore operations where safety, durability, and system efficiency are critical.
Hammer unions are widely used in the oil and gas industry for creating secure, leak-proof connections in high-pressure fluid handling systems. These fittings are ideal for connecting pipes, hoses, manifolds, and flow lines in drilling, completion, production, and well servicing operations. Common applications include mud lines, cementing lines, fracturing systems, acidizing units, water injection systems, and high-pressure test lines. Designed to perform reliably in extreme pressure and temperature conditions, hammer unions are trusted for both onshore and offshore operations where safety, durability, and system efficiency are critical.
Oil and Gas
- Flow line connections
- High-pressure pipe joints
Drilling Operations
- Mud line connections
- Cementing line fittings
Pipeline
- Temporary and permanent pipeline connections
- Maintenance and repair joints
Well Servicing
- High-pressure test lines
- Workover and stimulation systems
Hydraulic Fracturing
- Frac pump connections
- High-pressure manifold joints
Refining
- Process line connections
- High-pressure fluid transfer systems
Petrochemical
- Hose and pipe connections
- Pressure containment systems
Power Generation
- High-pressure auxiliary piping
- Turbine support line connections
Mining
- Slurry and water transfer line connections
- High-pressure hose fittings
Marine
- Deck pipeline connections
- High-pressure hose-to-pipe joints
Hammer Union Materials
Hammer unions are manufactured using high-strength, forged materials to ensure maximum durability, pressure resistance, and long service life in demanding environments. Common materials include forged carbon steel, alloy steel, and stainless steel, selected based on operating pressure, temperature, and corrosion exposure. For corrosive and sour gas applications, hammer unions are produced using NACE-compliant materials with enhanced resistance to hydrogen sulfide and chemical attack. Specialized surface treatments and protective coatings are also applied to improve wear resistance, prevent corrosion, and extend operational lifespan in harsh field conditions.
Ring gaskets are manufactured using various materials based on the application’s requirements. The material selection depends on factors such as the type of fluids being sealed, operating conditions (including temperature and pressure), and the overall environment. Here are some common materials used for manufacturing ring gaskets:
Carbon Steel
Ideal for general-purpose oilfield applications, offering high strength and durability in standard pressure and temperature conditions.
Alloy Steel
Designed for high-pressure and high-temperature environments, providing superior mechanical strength and wear resistance.
Stainless Steel
Offers excellent corrosion resistance, making it suitable for offshore, marine, and chemically aggressive environments.
Sour Service Steel (NACE Compliant)
Specially engineered for H₂S and CO₂ environments, providing enhanced resistance to sulfide stress cracking and corrosion.
Duplex and Super Duplex
Well-suited for applications requiring high strength, exceptional corrosion resistance, and resistance to pitting and crevice corrosion.
Product Details
Material selection
Asian sealing products offer hammer unions made from carbon steel and other alloy materials. Our team has carefully selected these materials to withstand extreme pressure and temperature. Contact our sales team to get more information.
Sealing Design Types
Our hammer unions feature various sealing designs based on the pressure requirement.
- Low Pressure: Employs a metal-to-metal seal created by conical and spherical surfaces.
- Medium Pressure: Includes an additional “O” ring to complement the metal-to-metal seal.
- High Pressure: Utilizes a lip-type seal ring positioned in the female union for enhanced sealing.
Types of End Connections offered
Asian Sealing Products offers Hammer Unions in both threaded and butt-welded end connections (May vary depending on the model).
Maintenance on Hammer Unions
Proper maintenance of hammer unions is essential to ensure safe operation, leak-free performance, and long service life in high-pressure oil and gas applications. Regular inspection of the wing nut, male, and female components for signs of wear, corrosion, cracking, or deformation helps prevent unexpected failures. Sealing surfaces should be kept clean and free from debris to maintain a tight metal-to-metal seal.
Threads and contact areas should be lightly lubricated with appropriate anti-seize compounds to prevent galling and ease repeated assembly and disassembly. It is also recommended to check for thread damage, misalignment, and seal integrity before reinstallation.
Routine maintenance ensures maximum reliability, minimizes downtime, and extends the overall service life of hammer unions in demanding operating environments.
Why Choose Asian Sealing Products Hammer Union?
Asian Sealing Products hammer unions are engineered for superior performance, safety, and durability in demanding oil and gas environments. Manufactured using high-grade forged materials and precision machining, our hammer unions deliver leak-proof sealing and long-lasting reliability under extreme pressure and temperature conditions. We offer a wide range of sizes and pressure ratings to meet diverse application needs, including custom-engineered solutions for specific service requirements. Our products are manufactured in compliance with international quality and sour service standards, ensuring consistent performance, reduced downtime, and enhanced operational safety for critical field operations.
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Answers to all your possible questions.
What are the main advantages of Hammer unions?
The main advantage of hammer unions is their ability to do rapid connection and disconnection without needing the usage of special tools. Apart from that the hammer unions provide excellent mechanical and sealing properties enabling them for high critical applications.
What Materials are hammer unions typically made of?
Hammer unions are generally made with Carbon steel, alloy materials and stainless steel. This allows them to withstand enormous pressures and handle the corrosive environments better. The selection of Hammer union material will be dependant on the type of application and the pressure that the union will be subjected to.
What are the different types of Sealing design?
Low-pressure hammer unions have a metal-to-metal type of sealing, which is created due to the conical and spherical surfaces of male and female union. Hammer unions that are used in medium-pressure applications will generally have an “O” Ring used in addition to the existing meal-to-meal seal. Hammer unions intended for High-pressure applications will have a lip-type seal ring which will be placed in the female union.
How do you maintain Hammer unions?
Always ensure that the sealing surfaces and elements of the hammer unions are in good form. General maintenance involves inspecting signs of damage, corrosion, and wear. Ensure to keep the thread area clean from rust and other debris.
What type of end connection does Asian Sealing Products offer in their Hammer Union?
Asian Sealing Products Hammer unions will be available in both Threaded, and Butt-welded end connections. (May vary depending on the model). Materials and the model of the hammer union will change according to the above factors.
How to select Hammer unions?
Hammer unions should be only selected according to the type of fluid used, the working pressure of the fluid, and the temperature of the fluid.
Is there Colour coding done on Hammer Unions?
All models of hammer unions are color-coded; this allows quick identification on the field. All unions intended for sour gas service will be painted Olive green, stamped with “NACE MR-0175” or “SOUR GAS” on the body of the wing nut.
What safety precautions to follow when using hammer unions?
Hammer unions should always be tightened firmly to avoid any major leaks. It is always essential to pick the right hammer union for your application and pressure needs. When connecting and disconnecting the unions, the personnel should not use excessive force.
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