The pipe coupling is a short pipe with female threads at both ends for pipe connection. There are so many different types of couplings available and each one has its own specific application. For example, when connecting drop pipes in a good application, you may consider using merchant couplings to connect them together. Hebei Sanvo is one of the quality pipe coupling manufacturers and suppliers in China, exports and customizes steel merchant coupling.The threaded pipe coupling sizes are American standard 1/8"-6", German standard DN6-DN150, and other standard sizes, etc; The materials are in carbon steel and stainless steel; The surface finish is galvanized and black; The merchant coupling types include standard full merchant couplings, standard half merchant couplings, extra heavy full merchant couplings, and extra heavy half merchant couplings.
This guide answers all the questions you have about pipe couplings. Look no further if you have been looking for information about steel pipe couplings.
You will find the most direct, yet detailed answers to basic questions, you often ask about steel merchant couplings.
Without further ado, here we go:
A coupling (or coupler) (used in piping or plumbing) is a very short length of pipe or tube, with a socket at one or both ends that allows two pipes or tubes to be joined, welded (steel), brazed, or soldered (copper, brass, etc.) together.
Alternatively, it is a short length of pipe with two female National pipe threads (NPT) (in North American terms, a coupler is a double female while a nipple is a double male) or two male or female British standard pipe threads.
If the two coupling ends are of different standards or joining methods, the coupling is called an adapter. Examples of adapters include one end BSP threaded with the other NPT threaded, and one end threaded with the other a plain socket for brazing.
A coupling whose ends use the same connection method but are of different sizes is called a reducing coupling or reducer. An example is a 3/4" NPT to 1/2" NPT coupling.
Hebei Sanvo is one of the quality pipe coupling manufacturers and suppliers in China, and the pipe couplings are steel merchant couplings made of high-quality carbon steel or stainless steel, the coupling finish is black or galvanized, and the threaded pipe couplings include full merchant coupling, and half merchant coupling.
There are so many different types of couplings available and each one has its specific application. For example, when connecting drop pipes in a good application, you may consider using merchant couplings to connect them.
Merchant couplings are manufactured according to ASTM A865 standards and are intended for use on steel pipe joints by ASME B1.20.1.
The merchant coupling dimension/size is 1/8"-6", and standard full merchant coupling sizes 1⁄8" NPS through 2" NPS are straight-tapped. Sizes 2 1⁄2" NPS and larger are always taper-tapped.
Note:
1) First, it comes down to cost. Tapered threads cost more to manufacture while straight threads cost less to produce.
2) Second, tapered threads seal better. They seal better because the threads get tighter the further down the coupling, while straight threads stay the same width throughout.
All merchant couplings are chamfered before they are threaded. This means that before the threading is done, a chamfer is created. It can be tricky to tell where the threads start on the chamfer, but it helps start threading the pipe into the coupling.
The Standard Full Merchant Couplings have a cylindrical, uniform design, providing a solid connection for standard-sized pipes. They also ensure durability and resistance to pressure.
Standard Half Merchant Couplings are used for tight spaces and have a compact profile. They provide reliable joint performance.
These heavy-duty merchant couplings were better for demanding applications. They feature thicker walls and tight seals, which are suitable for harsh environments and high-pressure systems.
Extra Heavy Half-Merchant Couplings are ideal for situations that require strength and space-saving.
Tips: The choice of merchant coupling depends on installation requirements such as size, pressure ratings, and space available. Each type is essential to maintaining the integrity of piping systems in various industries.
The difference between full merchant coupling and half merchant coupling is the difference between threads.
E.g:
1/8''-2'' Straight Tapped(NPS), 2.5''-6'' Taper Tapped(NPT).
Merchant Couplings in 2'' are available Taper Tapped as special.
1/8''-1''Taper Tapped(NPT), 1 1/4''-2'' Sraight Tapped(NPS), 2.5''-6'' Taper Tapped(NPT).
Merchant Couplings in 2'' are available Taper Tapped as special.
A pipe coupling is a kind of essential component that is popular in all walks of life, including:
Oil and Gas: A reliable connector for crude oil and natural gas with transportation.
Water Supply: Used in municipal and industrial water supply networks.
HVAC Systems: Facilitating connection in heating, ventilation, and air conditioning systems.
Construction: The durability and high strength of the pipe coupling make them crucial fittings in the construction industry.
Regular inspection and maintenance of pipe couplings are crucial for ensuring the longevity and reliability of piping systems. Look for signs of wear, leaks, or corrosion, particularly in couplings that are in high-stress or corrosive environments.
By familiarizing yourself with the different types of pipe couplings, their specifications, and applications, you can make better decisions suited to your project’s needs. If you have additional questions or need tailored advice, ask us!
