Product Description
Stainless Steel Coupling
Types of Stainless Steel Butt Welded Coupling:
|
Product Name |
Pipe coupling |
|
Size |
1/8″-4″ |
|
Standard |
ANSI B16.11 |
|
Pressure |
2000lbs, 3000lbs,6000lbs, 9000lbs |
|
Type |
full coupling or half coupling |
| End | Threaded or socket welded |
|
Process |
Forged |
|
Surface |
CNC machined, anti-rust oil, HDG(hot dip galv.) |
|
Material |
Carbon steel: A105, A350 LF2,etc. |
|
Pipeline steel: ASTM 694 f42, f52, f60, f65,f70 and etc. |
|
| Stainless steel: A182F304/304L, A182 F316/316L, A182F321, A182F310S, A182F347H, A182F316Ti, 317/317L, 904L, 1.4301, 1.4307, 1.4401, 1.4571, 1.4541, 254Mo and etc. | |
| Duplex stainless steel: ASTM A182 F51, F53,F55, UNS31803, SAF2205, UNS32205, UNS32750 , UNS32760, 1.4462,1.4410,1.4501 and etc. | |
| Nickel alloy: inconel600, inconel625, inconel690, incoloy800, incoloy 825, incoloy 800H,C22, C-276, Monel400, Alloy20 etc. | |
|
Cr-Mo alloy steel: A182 f11,f22,f5,f9,f91, 10CrMo9-10, 16Mo3 etc. |
|
|
Application |
Petrochemical industry;aviation and aerospace industry;pharmaceutical industry,gas exhaust; power plant;ship building; water treatment, etc. |
|
Advantages |
ready stock,faster delivery time;available in all sizes,customized;high quality |
Product Show:
Maxi Metal can supply Various of stainless steel pipe fittings including Elbow, Tee,Cap,Flange,Reducer,Nipple/Connector
, Ball Value, Butterfly valve,Connection Clamp, Union and etc.
Company Information:
With wide experience and expertise, CHINAMFG Metal Group is 1 of the leading stainless steel pipe fittings manufacturers and suppliers, The company through investment steel smelting and forging factory resume stability, a wide range of available resources.Main produce and process stainless steel bar/rod/shaft/profile,stainless steel pipe/tube, stainless steel coil/sheet/plate/strip, stainless steel wire/wire rod/wire rope.Our company supply products from MAXI,TISCO, LISCO, BAOSTEEL, JISCO and so on.We can customize non-standard special stainless steel products with high quality with short time. Our products used to chemical treatment equipments, chemicals tanks, petrochemical equipment and press plates. It is also used in railway coaches, roof drainage products, storm door frames, food machinery and tableware.
Our company developed international markets more than 25 years, and established long partnership with Germany, South American ,Australia, Saudi Arabia ,Southeast Asia. etc . We will be on the basic of advanced management and service concept to provide high quality products and perfect service for all over the manufacturing enterprise. We welcome customers from all over the world to cooperate with us.
Packing & Delivery:
CHINAMFG metal has its own shipping company to ensure lowest freight,professional service on delivery and Custom Clearance,we arrange good packing like wooden case, waterproof paper to ensure goods in a safty condition during transportation.
Certificate:
Quality is an integral part of CHINAMFG Metal Business Principles. The quality policy guides us to deliver products and services that exceed the customers’ expectations and meet all the standards. These principles have helped us to get the recognition as a trusted vendor from customers around the world. CHINAMFG Metal Products are trusted and chosen by customers all over the world. This trust is based CHINAMFG our quality certified and our reputation for consistently delivering high-quality products.
Why Choose us:
What you could get from CHINAMFG if we work together?
1. Quality:
We are professional symbol of Chinese Metal industry; so all the supplied metal products from MAXI are quality researched & guaranteed well ones. Quality is our life. No quality, no biz.
2. Price:
Based on mature and rich acknowledge & experience for stainless steel and alloy steel , MAXIMETAL’s supplied price could ensure customer has unique competitiveness in the market. As our aim is long-term biz instead of only profit by 1 or 2 order, we understand only customer win, we could win.
3. Delivery:
MAXI is 1 of TOP 10 manufacturer of stainless steel and alloy products in China, Hold 10000tons raw materials in stock,has its own rolling factory,So enjoy high priority for delivery: Usually within 10-15 from deposit date.
4. Payment:
MAXI supply 30% TT IN ADVANCE + 70% TT WITHIN 7 DAYS OF BL DATE or IRR L/C AT SIGHT for customers. And with cooperation’s growing & mature, better & better payment term will be issued, such as: L/C 30 DAYS, L/C 60 DAYS, L/C 360 DAYS, etc.
5. Service:
From MAXI, what customer could get is not only product, but also complete comprehensive marketting concept & service.
FAQ:
Q1. What are your company’s main products ?
A1: Our main products are stainless steel plate/sheet, coil, round/square pipe, bar, channel,Wire,Wire rod and etc.
Q2. How do you control quality ?
A2: Mill Test Certification is supplied with shipment, Third Party Inspection is available. and we also get ISO,SGS Verified.
Q3: What is the terms of packing?
A3: generally, we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers requirement.
Q4:What is your delivery time?
A4: For stocks, we could transport the goods to loading port within 7 days after we received your deposit
For production period, it usually takes about 15 days-30 days after receiving the deposit.
Q5. What are the advantages of your company ?
A5: We have many professionals, technical personnel, more competitive prices and best after-dales service than other stainless steel companies.
Q6. How many coutries you already exported ?
A6: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan,India,Philippines, Switzerland, South Korea, Vietnam etc.
Q7. Can you provide sample ?
A7: We can provide the samll samples in stock for free, as long as you contact us.
Customized samples will take about 5-7days.
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What are the Maintenance Requirements for Half Couplings to Ensure Their Longevity?
Proper maintenance is essential to ensure the longevity and reliable performance of half couplings in piping and plumbing systems. Regular maintenance helps prevent wear, corrosion, and other issues that could lead to leaks or failures. Here are the maintenance requirements for half couplings:
- Inspection: Regularly inspect all half couplings in the system for signs of wear, corrosion, or damage. Check for visible leaks or indications of moisture around the joints. Perform visual inspections and, if necessary, use non-destructive testing methods to assess the integrity of the couplings.
- Cleaning: Keep the half couplings clean and free from dirt, debris, or other contaminants. Clean the coupling surfaces and surrounding areas during maintenance to ensure a proper fit and prevent corrosion.
- Lubrication: For threaded half couplings, apply a suitable lubricant or thread sealant when assembling the connection. This helps prevent galling and ensures a smooth and secure fit between the threads.
- Protection from Corrosion: Take measures to protect the half couplings from corrosion, especially in environments where corrosion is likely. Consider using corrosion-resistant materials for the couplings or applying protective coatings to prevent rusting.
- Temperature and Pressure Considerations: Ensure that the half couplings are suitable for the operating temperature and pressure of the system. High-temperature or high-pressure applications may require special materials or additional maintenance considerations.
- Replacement of Worn or Damaged Couplings: If any half coupling shows signs of wear, damage, or reduced performance during inspections, promptly replace it with a new one. Avoid using couplings that do not meet the necessary standards or show signs of fatigue.
- Proper Installation: During maintenance or replacement, ensure that the half couplings are correctly installed following the manufacturer’s instructions and industry best practices. Proper installation is crucial for achieving a secure and leak-free connection.
- Consider Thermal Expansion: Account for thermal expansion and contraction in the system to prevent stress on the half couplings and other components. Adequate flexibility and expansion joints can help accommodate temperature changes.
- Regular System Checks: Perform regular system checks to monitor the overall health and performance of the piping or plumbing system. Address any issues detected during these checks promptly to prevent cascading problems.
Adhering to these maintenance requirements will help ensure the longevity and reliable operation of the half couplings, contributing to the overall efficiency and safety of the piping or plumbing system.

What are the Differences Between Half Couplings and Full Couplings in Pipe Fittings?
In pipe fittings, both half couplings and full couplings serve the purpose of joining two pipes together, but they differ in their design and applications. Here are the key differences between half couplings and full couplings:
- Design: The main difference lies in their design. A half coupling has one end with internal threads or a socket, allowing it to be connected to a threaded pipe or inserted into the end of a pipe without threading. The other end of the half coupling is an open end, ready to be welded or threaded to another pipe. On the other hand, a full coupling has both ends with female threads, enabling it to connect two threaded pipes directly without the need for welding.
- Function: Half couplings are commonly used to create a joint between a pipe and a component such as a valve, pump, or pressure gauge. The open end of the half coupling facilitates easy attachment to the component, while the threaded or socketed end connects to the pipe. On the other hand, full couplings are used when a direct, rigid connection between two pipes is needed, providing a continuous flow path without any interruptions.
- Application: Half couplings are frequently used in situations where frequent disassembly or maintenance may be required. For example, in systems with valves that need periodic inspection or replacement, a half coupling allows for easy removal without disturbing the entire pipeline. Full couplings, on the other hand, are more suitable for applications where a permanent, leak-proof connection is needed, such as in pressurized systems or critical process pipelines.
- Length: Full couplings are typically longer than half couplings because they need to accommodate two threaded ends, while half couplings have one threaded or socketed end and an open end, making them shorter in length.
- Installation: The installation process differs for half and full couplings. Half couplings are welded or threaded onto one pipe end and then connected to another pipe or component using welding or threading, respectively. Full couplings, on the other hand, directly join two pipes with threaded ends, requiring no additional welding or threading.
- Flexibility: Half couplings offer more flexibility due to their ability to connect to different types of components or pipes with varying end connections. Full couplings are less flexible in this regard, as they can only join two threaded pipes together.
Overall, the choice between half couplings and full couplings depends on the specific requirements of the piping system, including the need for temporary connections, the type of components being attached, the nature of the fluid being transported, and the desired level of joint permanence and flexibility.

What are the Various Types of Half Couplings and Their Specific Applications?
Half couplings come in different types, each designed to cater to specific applications and requirements in piping and plumbing systems. The various types of half couplings and their specific applications are as follows:
- Threaded Half Couplings: Threaded half couplings have internal threads on one end, allowing for easy connection to pipes with matching external threads. These couplings are commonly used in applications where a secure and leak-proof joint is needed, such as connecting valves, instruments, or equipment to the pipeline.
- Socket Weld Half Couplings: 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. Socket weld half couplings are widely used in high-pressure applications and systems that require frequent disassembly.
- Butt Weld Half Couplings: Butt weld half couplings are designed for butt welding, which involves welding the coupling directly to the larger pipe end. The other end can be used to attach a smaller pipe. These couplings are commonly used in critical applications where a smooth and continuous inner surface is required to prevent turbulence and pressure losses.
- Reducing Half Couplings: Reducing half couplings are used when a transition between different pipe sizes is needed. One end of the coupling has larger threads or a larger socket to accommodate a larger pipe, while the other end has smaller threads or a smaller socket to connect a smaller pipe. These couplings are commonly used in systems that require a change in pipe size, such as reducing the flow rate or connecting equipment with different pipe sizes.
- Mechanical Grip Half Couplings: Mechanical grip half couplings use a mechanical mechanism to grip and secure the smaller pipe without welding or threading. They are commonly used in temporary connections or situations where frequent disassembly is necessary, such as in temporary test setups or during equipment maintenance.
The choice of half coupling type depends on the specific application, the pipe materials, the operating conditions, and the required joint strength. It is essential to follow industry standards and guidelines when selecting the appropriate type of half coupling to ensure the safety and efficiency of the piping or plumbing system.
In summary, various types of half couplings cater to different needs in piping and plumbing systems. Whether for permanent connections, temporary applications, or transitions between different pipe sizes, half couplings offer versatile solutions for joining pipes securely and efficiently.


editor by CX 2023-12-26