PP fittings for polyethylene (PE)

El polypropylene (PP) It is a plastic material used in many industries, such as textiles or automobiles. It is positioned in second place in the ranking of the most used plastics, and is obtained from the thermoplastic propylene through its polymerization.

This plastic has numerous properties that make it characteristic, such as:

• Commercial polymer of lower density (lightness).
• High thermal stability, due to its high melting point (160⁰C), so it can be worked with at high temperatures.
• Low moisture absorption capacity.
• High mechanical resistance (tension and compression) and chemical resistance (acids and alkalis).
• Electrical insulation.
• Acceptable resistance to UVA rays.
• Ability to be molded by most plastic transformation processes.
• Recyclable material.

In agriculture, the most widely used plastics are polyethylene (PE), polyvinyl chloride (PVC), ethylene vinyl acetate (EVA) and polypropylene (PP).

Polypropylene polymer (PP) is the most widely used material in connection accessories for pipes. low density polyethylene. It's important to put attention on It is not advisable to work with accessories made of this material in installations with pressures greater than 6 bars.

Low density polyethylene pipe for agricultural use

Polyethylene is one of the most produced plastics worldwide. It consists of a polymer obtained from the polymerization of ethylene. One of its many applications is agriculture, where a distinction is made between high and low density polyethylene.

Within this low-density category we have agricultural polyethylene (it has green lines along the tube) and food-grade polyethylene (it has blue lines to differentiate it).

The difference between agricultural and food polyethylene is that in agricultural there may be migration of particles that make it unsuitable for conveying drinking water. In fact, food grade polyethylene pipes must be included in the health registry.

Agricultural low-density polyethylene pipes (PE32) are marketed in diameters from 16mm to 110mm and in black, brown and violet colors (for recycled water).

Classification of PP fittings for polyethylene pipe

Below we will indicate the main PP accessories for use in agricultural or low-density polyethylene pipes:

• ELBOW

The elbow is a connection element that joins two tubes and allows the direction of the conduction to be changed gradually. In the case of polypropylene elbows, work is done at a 90⁰ angle.

The polypropylene elbows can be joined to the pipes by compression or mixed joint, with male or female thread, even to the wall.

 

• TE

The tee is a connection element that allows joining 3 polyethylene pipes at 90º angles.

They can present the type of union both in compression or mixed, with the central outlet through a female thread.

 

• SLEEVE

The sleeve is an accessory whose purpose is to join two sections of pipe. With this piece you can maintain the diameter of the conduit or even reduce it. In addition, they can be connected by compression or internally with a herringbone joint and clamps.

• TERMINAL

This element allows the union of agricultural and low-density polyethylene (PE) pipes to a threaded fitting, both female and male.

• Tapon

The plug is the piece that is placed at the end of the pipe to close the irrigation system on the pipe. It is compression-joined to agricultural and low-density polyethylene (PE) pipes.

 

Threaded polypropylene elements

The threaded polypropylene elements (male, female) do not connect directly with the pipe, but are used for threaded joints of the different agricultural irrigation accessories, among other threaded materials. They can transform the output of a piece of equipment such as a pump, filter, solenoid valve..., from a male thread to a female thread and vice versa, as well as its metric enlargement or reduction, always with the use of Teflon or a similar element for the threaded union.

These would be the most representative threaded accessories:

 

• THREADED ELBOW

The elbow allows you to change the driving direction gradually. In the case of polypropylene elbows, work is done at a 90⁰ angle, and the union is a male thread.

• MACHON

A stud consists of a body threaded on both sides with a male thread, to which another element of the installation with a female thread is attached. It can have the same metric or a reduction.

 

• NUT

Extension nuts or reduction nuts are the pieces used for the connection between elements of different metrics with male thread and female thread outlets in the same piece.

 

• THREADED TEA

Threaded tees are manufactured with a male threaded outlet for joining with other female threaded accessories in 3 directions with 90º angles.

 

• THREADED SLEEVE

The threaded sleeve has both female threaded outlets, so it is used for connecting accessories with a male threaded outlet.

 

Para cualquier consultation, write us or call us! We will answer your questions without any commitment. If you are interested in PP fittings for polyethylene, System of drip irrigation or another type of accessory or material, take a look at our web page of Mundoriego!