Product Description
Product Parameters
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Description |
Welding nipple, barrel nipple, close nipple, merchant coupling, welding coupling, kc nipple, hose nipple |
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Thread |
BSPP, BSPT, NPT, DIN thread, male and female thread |
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Surface |
Natural surface, sandblasting, galvanized (hot dip galvanized, cold/electrical galvanize) or polishing finished. |
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Material |
Stainless steel 304, Stainless steel 316/316l, carbon steel, weld and seamless |
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Thickness |
thickness, sch10, sch20, sch40, sch80, sch160, XH, XXH and so on, pressure 150lb and 3000psi. |
Company Profile
Different kinds of products are available in our company. We’re pleased to get your Inquiry and we will reply you as soon as possible. We stick to the principle of “quality first, service first, continuous improvement and innovation to meet the customers” for the management and “zero defect, zero complaints” as the quality objective.
HangZhou Gangyu Metal Products Co., Ltd.
Different kinds of products are available in our company. We’re pleased to get your Inquiry and we will reply you as soon as possible. We stick to the principle of “quality first, service first, continuous improvement and innovation to meet the customers” for the management and “zero defect, zero complaints” as the quality objective.
We have a certain influence in the industry and are willing to cooperate with new and old customers for mutual benefit, and provide comprehensive services! The products sold by the company are suitable for various fields such as engineering, coal mining, textiles, electricity, boilers, machinery,industry, etc.
The service philosophy of the service industry is: Professional operation, honest service, and customer first; Enterprise oriented and service oriented; High quality service and meticulous maintenance; Quality first, service first, and people-oriented.
Hard and solid, honest commitment, practical results “: Strive for a CHINAMFG corporate foundation with a tough work style; Promise first-class enterprise services with honest beliefs; The spirit of practical work creates efficient corporate performance
Certifications
Packaging & Shipping
FAQ
Q: Are you Manufacturer or Trading company?
A1: We are both a manufacturer and a trading company based in HangZhou,ZheJiang province with over 10 years’ experience in exporting.
Q: What’s your main products?
A2: Our main products is including Stainless Steel Strip grade in 201,301,304,304L,316L, 430, 410L.
Q:Do you provide samples ?
A3: Yes, we could offer the sample for free charge but the cost of freight is by receiver, normally.
Why choose us?
1. With 10 years’ experience in Stainless Steel strip manufacturing.
2. Competitive Price and Best Services.
3. Work with many famous brands,such as Tisco,Baosteel.
4. Strong production capacity.
5. Excellent exprience of after-sale service.
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Can a Half Coupling be Threaded or Welded onto Pipes?
Yes, a half coupling can be both threaded and welded onto pipes in piping and plumbing systems. The method of attachment depends on the type of half coupling and the specific application requirements.
Threaded Half Coupling: Threaded half couplings have internal threads on one end, allowing for easy connection to pipes with matching external threads. To install a threaded half coupling, the larger end with internal threads is screwed onto the male threads of the larger diameter pipe. The smaller pipe is then threaded into the other end of the half coupling, creating a secure and leak-proof joint. Threaded half couplings are commonly used when frequent disassembly may be required or when connecting components like valves or instruments to the pipeline.
Socket Weld Half Coupling: Socket weld half couplings have a socket on one end, which allows for the insertion of the pipe without threading. The joint is then welded for a strong and permanent connection. The larger diameter pipe is inserted into the socket, and a fillet weld is applied around the outside of the coupling to secure the smaller pipe. Socket weld half couplings are often used in high-pressure applications and systems that require a robust and reliable connection.
Butt Weld Half Coupling: Butt weld half couplings are designed for butt welding, which involves welding the coupling directly to the larger pipe end. The smaller pipe is inserted into the other end of the half coupling, and a butt weld is applied to secure the joint. Butt weld half couplings are commonly used in critical applications where a smooth and continuous inner surface is required to prevent turbulence and pressure losses.
The choice between threaded and welded half couplings depends on factors such as the operating conditions, the type of fluid being transported, and the required joint strength. Threaded half couplings offer ease of installation and disassembly, making them suitable for applications where frequent maintenance is needed. On the other hand, socket weld and butt weld half couplings provide permanent and strong connections, making them suitable for high-pressure and critical systems.
Regardless of the method of attachment, it is essential to ensure proper installation and adherence to industry standards to achieve a secure and leak-free connection. Regular inspection and maintenance of the half couplings and the entire piping system are also necessary to detect any signs of wear, corrosion, or damage and address them promptly.

Are there Special Half Couplings Designed for Specific Types of Pipes (e.g., Stainless Steel, PVC)?
Yes, there are special half couplings designed to be compatible with specific types of pipes, such as stainless steel, PVC, and other materials. The choice of half coupling material should be based on the properties of the pipe and the requirements of the application. Here are some examples of special half couplings designed for specific types of pipes:
- Stainless Steel Half Couplings: These couplings are specifically designed to be used with stainless steel pipes. Stainless steel is known for its corrosion resistance and is commonly used in applications where the conveyed fluid or gas may be corrosive or require high hygiene standards. Stainless steel half couplings provide a reliable and durable connection in such environments, making them suitable for industries like food processing, pharmaceuticals, chemical processing, and marine applications.
- PVC Half Couplings: PVC pipes are widely used for water supply, drainage, and irrigation systems due to their lightweight, corrosion resistance, and affordability. Special half couplings for PVC pipes are typically made of PVC material or other compatible plastics. These couplings ensure a secure and leak-free connection in PVC pipe systems, especially in residential and agricultural applications.
- CPVC Half Couplings: CPVC (Chlorinated Polyvinyl Chloride) pipes are used in applications where higher temperature and pressure resistance are required compared to standard PVC pipes. CPVC half couplings are designed to be compatible with CPVC pipes, providing a reliable joint for hot water supply, industrial piping, and other high-temperature applications.
- Copper Half Couplings: Copper pipes are commonly used for water supply lines and in refrigeration systems. Half couplings made from copper or brass are suitable for connecting copper pipes, ensuring a tight and durable connection in residential and commercial plumbing systems.
- Galvanized Steel Half Couplings: Galvanized steel pipes are coated with a layer of zinc to enhance their corrosion resistance. Half couplings made from galvanized steel are used with galvanized pipes in outdoor applications or in areas prone to corrosion, such as in sprinkler systems and outdoor water distribution.
- Alloy Steel Half Couplings: In high-pressure and high-temperature applications, where the properties of carbon steel are not sufficient, alloy steel half couplings are used. These couplings are designed to handle the demanding conditions of industries such as oil and gas, petrochemicals, and power generation.
It is essential to select the right half coupling material that matches the properties and requirements of the specific type of pipe in the system. Using a compatible half coupling ensures a reliable and leak-free connection, reduces the risk of corrosion or degradation, and contributes to the overall efficiency and longevity of the piping system.

What are the Different Materials Commonly Used for Manufacturing Half Couplings?
Half couplings are pipe fittings used in piping and plumbing systems to connect two pipes of different sizes. They are available in various materials, each offering unique properties suitable for different applications. Some of the commonly used materials for manufacturing half couplings include:
- Stainless Steel: Stainless steel half couplings are popular due to their excellent corrosion resistance, high strength, and durability. They are ideal for applications involving aggressive or corrosive media and are commonly used in industries such as chemical processing, oil and gas, and food processing.
- Carbon Steel: Carbon steel half couplings are known for their high tensile strength and affordability. They are widely used in industrial applications where the fluid being transported is not corrosive. Carbon steel couplings are commonly used in water supply systems, heating, and ventilation systems.
- Brass: Brass half couplings are valued for their resistance to dezincification and corrosion. They are often used in plumbing systems, particularly for connecting copper pipes. Brass couplings find applications in water supply lines, plumbing fixtures, and other potable water-related applications.
- Copper: Copper half couplings are commonly used in plumbing systems and HVAC (heating, ventilation, and air conditioning) applications. Copper is known for its excellent thermal conductivity and antimicrobial properties, making it suitable for applications where heat transfer and cleanliness are crucial.
- Aluminum: Aluminum half couplings are lightweight and corrosion-resistant, making them suitable for specific industrial and marine applications. They are often used in the transport of certain chemicals and in offshore installations.
- Bronze: Bronze half couplings are known for their strength and resistance to corrosion and wear. They find applications in marine environments, particularly for seawater piping systems, as well as in some oil and gas applications.
The choice of material for half couplings depends on various factors such as the nature of the fluid being transported, the operating conditions, the required strength, and the budget constraints. Proper material selection is essential to ensure the longevity and efficiency of the piping or plumbing system.


editor by CX 2024-01-10