Paint painting area - features, table and recommendations

Painting pipes is an obligatory procedure that plays not only an aesthetic role, but also extends the life of the pipeline. Painting work is carried out with the help of consumables such as primer and paint. But how to determine how many will be required, so that there is enough, and there is no surplus left? It is especially difficult to do this when large amounts of work are planned, for example, processing communications at a gas distribution station. To correctly calculate the amount of paint, you need to know the color of the pipes. How to calculate it, let's talk further.

Types of pipes

First of all, it should be taken into account that the paint consumption will be affected not only by the size of the pipes, but also by their shape, and by the structure of the material from which they are made. So, for example, to cover smooth-walled and corrugated products of the same size, different amounts of paint will be required.

Pipes can have a variety of shapes and sizes. Depending on these parameters, the scope of operation of the pipe products is determined. The most common pipes are cylindrical with a circular cross-section, used most often for the construction of water pipes and gas pipelines.

A popular type of building metal is profile pipes, which have a section that differs from the round one. They can be oval, square and rectangular. From them frameworks of constructions, various металлоконструкции, overlapping and пролеты are created.

Corrugated pipes with a circular cross-section are used for the construction of underground non-pressure domestic and industrial sewage systems, storm collectors.

There are also pipes with a cone shape. They are designed for pressure injection systems.

Measurements

You can calculate the amount of paintwork materials in two ways: using a special table or by applying geometric formulas. In both cases, exact measurements of the products will be required.

If there is a table for the color of the pipes, it is only necessary to find a position in it with the same dimensions as those obtained from the measurements, and see the consumption of paint or primer. Calculating with the help of formulas is a more complex but no less effective way. To determine the surface area of pipes of a certain shape and cross-section, the corresponding formulas are used.

Cylindrical tubes

To make calculations, you need to know the length of the pipe and its outer radius. The length is measured in meters, and the radius is in millimeters. The following formula is used:

S = 2 x π * R x L, where:

• S - area of the pipe for painting;
• Π is the pi number of 3.14;
• R is the radius;
• L is the length.

For example, with a pipe length of 10 m and a diameter of 60 mm, its surface area will be 1.88 square meters. Meter.

According to the same formula, the surface area of the sewage pipes is calculated. The only difference between these designs is the large size. For example, in sewer wells, the diameter can be 70-200 cm. In such cases, the standard height of these products is 90 cm.

The painting area of the profile pipe

To determine the value of interest, you need to know:

• Height of one side of the pipe (H);
• Height of the other side (W);
• Length (L).

Calculations are carried out according to the following formula: S = 2 x H x L + 2 x W x L. For example, with a product length of 10 m and sides heights of 10 and 5 cm, the surface area of the surface will be 3 sq. M. Meters.

The color of the pipe is steel cone-shaped

In pipes with a truncated cone, the following parameters are measured:

• Length (L);
• Diameter of smaller circle (R1);
• Diameter of the larger circle (R2).

To determine the pipe coloring area, the formula S = 2 x π x R1 x L + π x (R1 x R1 + R2 x R2) is used. For example, if the length of the structure is 10 m, and the radii are 3 and 6 cm, the total area is about 2 meters.

Corrugated pipes

In such products it is most difficult to accurately calculate the area of their surface, because they can be stretched along the length. For the convenience of calculations, it is recommended that all values obtained during measurements be written in the form of a table.

So, you need to set the following parameters:

• Radius of curvature (A);
• Projections of equal parts by length and diameter (B, D);
• The step size of the corrugation (C);
• Angle of slope of the flat section (E);
• Height of the corrugated part (F);
• Extrusion line (G).

On a concrete example we will consider, how calculations are carried out. For example, the value of A is 3 mm. To determine the size of the rounded part, the formula 2 x π x A is used. Thus, 18.84 mm is obtained. The value of D must be doubled, let it be equal to 20 mm. Taking into account the above data, it is possible to determine the length of the corrugation in a stretched form - 38.84 mm.

After removing the angle of inclination, calculate the value of E. This indicator will be equal to twice the diameter, that is 12 mm.

Suppose that the length of the product is 10 m. To calculate the number of folds, the length is divided by a step and we get 866 pieces. Further it is necessary to determine the length of the corrugated pipe in the stretched state. With a diameter of, for example, 52 mm, the total area of the structure will be 54.92 square meters. Meter.

Choice of paints and varnishes

For the painting of pipes different types of paints are used:

• Acrylic enamel, which contains organic solvents, providing a durable and durable glossy coating.
• Alkyd enamel is on sale in a huge range of colors. Such paints are also characterized by strength, form a reliable layer, not cracking and not erased.
• Water-dispersion paints. Advantages of such formulations include fast drying ability and absence of unpleasant odor. To disadvantages is a weak resistance to abrasion and water. Before using paints on a water-based basis, the pipes must be coated with a priming agent.
• Oil paint. It is rarely used for painting pipes. Available in a small color assortment. Before painting metal surfaces, including pipes, it is required to apply a primer that can provide a strong connection with the paint. Painting composition on an oil base is applied to the dried primer in at least two layers.

When choosing the type of paint for painting pipes, it is first of all necessary to be guided by their purpose and operating conditions, since factors such as temperature, humidity, risk of mechanical damage, etc., will depend both on the longevity of the coating and on the term Service pipes themselves.