Square plastic pipes: types, advantages and disadvantages

Pipe with a square cross-section are used in the construction of houses, industrial pipelines, ventilation systems. Square products combine easy round.

application

• Used in the manufacture of furniture. Original look in fences, having an advantage over hardware.
• Used in the construction of indoor and outdoor areas. PVC pipes are used for agriculture: it is connected to the nipple drinker system for ducks, geese, chickens, rabbits and other pets. This tube helps to keep the entire system vertically. Its dimensions are selected relative to the thickness profile. Installation runs perpendicular to the nipple. This eliminates the loss of water in drip mode.

• Greenhouse of the plastic pipe is durable and inexpensive.
• Large sizes are used as cable trays, air ducts.
• Used for the production of plastic windows.

Especially claimed square tube in the chemical, petrochemical and food industries.

Advantages and disadvantages square plastic pipes

Pros:

• weatherability;
• undemanding to care;
• It is resistant to corrosion;
• long operating time;
• It does not harm the environment;
• when applying no noises of water therein;
• increased tightness.

Minuses:

• low fire;
• contact with the hot air is undesirable;
• complex assembly, requiring additional elements and certain skills;
• not all models are suitable for hot water.

Types, advantages and disadvantages of plastic pipes square

PVC Polyvinyl chloride

It is the most common type.

Installation is carried out by cold welding or push-fit manner. Rigid profiles connected fittings. Laying is performed in a hidden and open form. Polyvinyl chloride is cheaper galvanized metal materials.

Meter PVC pipe weighs 5.62 kg. The inner surface has a low roughness, so that the material is self-cleaning and a decrease in fluid pressure is excluded.

Pros:

• improved chemical stability;
• resistant to chlorination and active substances;
• resistant to biological organisms;
• UV light does not affect the quality;
• does not corrode;
• environmental Safety.

Disadvantages of PVC:

• lighter in direct sunlight;
• sensitivity to shock and bending;
• can not withstand contact with boiling water;
• are not intended for installation in the ground, require special boxes;
• noise when the water flow.

Widespread square model of PVC in ventilation systems.

polypropylene

The design presented single- or multilayer rows. Weight meter polypropylene products - 7.06 kg. The inner surface is smooth. Durability is 28 -35 MPa.

Pros:

• corrosion-resistant;
• unchanged when exposed to chemicals, active substances during chlorination;
• high degree of biosafety (fungus, bacteria);
• light weight, simple transportation;
• Some models can withstand temperatures of -95 ° to + 140 °;

Minuses:

• low tightness, except compound node with metal pipes;
• It does not maintain a low temperature.

fiberglass

Used in construction and industry. Profile is manufactured by pultrusion, which is a shaping and curing the impregnated polymer fiber web by means of special high-strength molds (dies).

GRP has a small specific gravity - from 0.4 to 2 grams per cubic centimeter. Durability is nine times greater than PVC. Dielectric characteristics provide full security. Corrosion resistant, resistant to the aggressive environment, the effects of salt, acid and alkali. Also, this material is not afraid of hydrochloric, sulfuric, nitric, acetic, phosphoric acid (depending on concentration), sodium hydroxide, ferric chloride.

Pros:

• Low thermal expansion coefficient;
• resistant to water and temperature difference (temperature kept between -60 degrees to +80 degrees);
• lightweight material;
• high fire resistance;
• pleasing appearance;
• high thermal conductivity;
• greater resistance to moisture and water;
• biological stability.

shortcoming - low degree of thermal insulation.

Design

dimensions

Main characteristics when choosing plastic pipe - the diameter of the cross section. They have a certain thickness of the wall, and some models even one of them and thicken. external and internal section therefore released.

It is an internal section is taken into account when planning projects. Popular diameters plastic square tubes in mm:

10x10	20x20	30x30	45x45	80x80
15x15	22h22	35x35	50x50	100x100
1616	25x25	40x40	60h60	120x120

The wall thickness for each section is its own. Specifications vary by manufacturer. For example, 20x20 tube has a thickness of 1.5 mm; 35x35 - 3 mm; 50x50 - 4 mm.

Color

The color range is expanded from the standard white, black and gray colors to green, blue, red, yellow. There pipes imitating various types of trees.

Length

Pipes are produced in standard sizes of one, three, four and five meters.

For distributors it is easy to cut the desired length of 3.5 meter or 1.5.

To join two segments are used fittings, and to close the openings - plugs selected according to the diameter of the cross section.

Mounting

Connect the square plastic pipe welding is permissible, but this method is more commonly used for construction or furniture.

Compound segments with each other or square cross-section profile with a round occurs via fittings. Choosing element to consider operating conditions.

coupling connects a square tube with a round, made of rubber, is fixed by clamps. Coupling stub is a rubber element which is mounted on the end profile.

Adapter connecting pipes of different cross-section, a square with a circle.

Tee It combines three square tubes, attached to each side of the collars.

When hardware pipeline of polypropylene is considered the thermal expansion coefficient. The tube is heated during normal operation to 60 degrees, the length increases by 9 millimeters.

When the extension is not enough space under heating pipe ruptures. Mounting of volumetric heating and hot water requires consideration this factor, otherwise occur impulse pipe.

For safe operation of the pipeline expansion joints are added to the temperature. The pipeline in the building length are not more than 1 meter should be equipped in a confined space.

Some polypropylene tubes in their structure comprises a layer of aluminum foil. Thus there is a decrease in the coefficient of expansion as the temperature rises. The cost of such products above.

Problems

Reasons - violation mounting mechanical damage during use, in the manufacture of marriage.

By the time the measures are:

metal clamp

To begin overlaps heating, water. The collar is put on the spot leaks, tighten the bolts on the sides.

Rubber

Fixing rubber. In this way, repaired plumbing and heating. Wrap the problematic place a piece of rubber, pinch clamp and tighten. Permissible to pull the wire or cord.

Paint

Correct the fine flow by using paint. On the problem area wound tissue segment paint. Water block to dry completely.

Reliable solution is to replace the damaged section.

Glue

Pre-clearing damage to expand it to the maximum, degreased and dried. Apply silicone sealant.

The through-hole is sealed a two-component epoxy adhesive. Problem areas prepared as described above, the bandage is wound from a dense material such as fiberglass.

After winding the layer 5 is coated with an epoxy adhesive. Instead of using a band sealing tape, adhesive cloth soaked presented.

It is pasted without folds, the material is applied tautly. The next layer overlaps the previous half. The tape does not tolerate the sun's rays, so its surface is covered with a protective layer.

Cold welding

Compound plastic pipes all purposes. The surface is treated with sandpaper, degreased. The required amount of material is kneaded by hand to reach a brown color on the basis of clay.

Next, apply to the problem area, tow pin. An hour later saw off or trim the irregularities, as it hardens. The process is accelerated by using a hair dryer.

The functionality of a square shape allows designs of varying complexity. A complement attractive appearance design space using a square plastic pipe in any design.