There are many ways to use pp compression fitting. Both piping systems and electrical piping systems require pp compression fittings to connect pipes or pipes together. They are also used in toilet stop valves and hot and cold water taps in domestic and industrial environments. In addition to being used in the construction industry, compression joints are also common in the oil and gas, biotechnology and chemical industries.


What is a pp compression joint?
Generally, pp compression fittings consist of an inner ring and an outer nut, which are made of brass and copper. The inner ring is called the ferrule. Install it on the pipe to be connected, and the outer nut slides over the pipe. The pipes are then clamped together by tightening the nuts, pressing them against the ring to form a tight joint, which should be air and water tight. When larger pp compression fittings are required, it is usually a flange instead of a single nut, but with a bolt ring, and each bolt must be tightened evenly to ensure a correct and effective seal. In all cases, the nut should not be too loose or undertightened, otherwise it will damage the joint and cause leakage.


Type of pp compression joint
There are two different types of pp compression joints-standard and flare. Standard pp compression fittings are mainly used in plumbing and compressed air applications. They are used to connect pipes to valves, connect pipes together, to pumps and filters, and to tank fittings.

Advantages of standard compression fittings


Although it is the simplest compression coupling, standard joints do their job well. When only two bundles of pipes need to be connected, it is perfectly suitable to use standard pp compression joints. There is no advantage to making the connection more complex than necessary.

Standard couplings have the biggest advantage over flared compression, which is due to their simplicity and the requirements of a ring and a nut. The joints are simple and straightforward, and can be installed with few tools and hassles to obtain satisfactory result. Most standard compression accessories can be completed using standard tools, such as a wrench for tightening a nut. They do not require welding and can be done by non-professionals. This also means that standard accessories are much faster than flared accessories.



Another advantage is that no pipe changes are required when making standard joints. When flaring fittings are required, changes to the pipe need to be made to match the flaring of the fitting. This requires special tools. The resulting flared joint provides a tighter, more reliable seal and is the first choice for chemical and electrical pipelines as well as high-pressure systems such as oil and gas pipelines. As these industries have an ever increasing risk of hazards in pipeline leaks, they need the strongest fittings to handle dangerous and costly leaks.

In terms of cost, standard compression is the lowest price option, requiring only rings or nuts and minimal labor. Another advantage is that simplicity makes it easy to disassemble.



Standard compression joints and welded joints
Although in most cases, well-assembled couplings are not particularly disadvantageous because they provide a reliable seal, sometimes welded joints provide greater durability and reliability. Where joints are prone to bending, this may affect the integrity of standard and / or flared crimps; welded joints are preferred. Welded joints are more difficult to install and take longer, requiring special tools.

However, it should be noted that where the heat required for the installation is dangerous (such as gas or oil pipes), welding joints are not suitable.



Standard compression fittings and threaded fittings
Threaded joints (ie joints in the form of screws) work well on malleable materials such as aluminum, copper, brass, iron, and polymers, and can provide a sealed connection. However, there is usually one minute of opening time at the root of the thread. Attempting to compensate for this can result in over-tightening, which reduces the integrity of the joint. Further tightening can deform the metal and increase the risk of leakage. Standard compression and flaring compression overcome the problem of metal deformation. Compared to threaded joints, standard and flare compression joints are also more suitable for harder materials, such as stainless steel.

As with most things, the point is to choose the best joint for the job. Do not overtighten and regularly check the integrity of the joint.



Yuhuan Hejia Pipe Fittings Co., Ltd. is a professional China manufacturer and supplier of   pp compression fitting   . We can also develop and design plastic molds based on drawings and samples provided by the buyer, and provide customers with quality products, reliable quality and better after-sales service. Welcome to buy: