Pipe Materials, Corrosion Types and Connection Methods

Grommet and Plastering

Grommet: If the pipes are plastic, it does not matter if you apply mortar; but if the pipes are metal, first prepare the metal properly and then apply polyurethane plaster to finish.

Corrosion

Corrosion is a process of irreversible degradation of the properties of metals and alloys that affects all installations made with metal materials.

Three Types of Actions

Three types of actions:

• Chemical action — without external driving force; with external electromotive force (emf).
• Chemical-action only.
• Biochemical actions.

External Corrosion

External Corrosion: The agents of external corrosion of the pipes are humidity and some building materials that are aggressive, such as mortar, plaster, and slag.

Internal Corrosion

Internal Corrosion: The aggressiveness of the water to the pipes depends on many factors: acidity, the nature and concentration of dissolved salts.

Embedding and Water Solutes

Embedding: Independence. It manifests with the total pipe material that conducts it. Water, due to its great solvent power, is never pure; it carries dissolved salts and gases of various types. The salts and substances dissolved in water sometimes come from the natural environment where we take it — rivers, wells — and from other manipulations by humans for certain purposes and applications.

Copper Pipes

Copper Pipes:

(Cu) is a metal with a reddish-salmon color, very ductile, malleable, and a good conductor of heat and electricity.

Copper: Main Features

copper main features:

• Ease and speed of preparation and placement.
• High resistance to corrosion.
• Melting point is 1082 °C.
• Long service life and high durability; its incorruptibility is often guaranteed.

Copper: Forms of Delivery

forms of delivery:

• Rolls: supplied up to 22 mm outer diameter, length up to 50 m.
• Rolls: Generally are delivered in soft copper and copper pipe bends easily.
• Straight-on strips: These tubes are supplied without annealing, which provides good rigidity.

Copper: Joints

• Capillary soldering
• Capillary brazing
• Mechanical-pressed unions
• Mechanical compression unions

Steel Pipes

Steel Pipes: Iron is a chemical element (Fe) and is not pure. Iron is a gray metal, a good conductor of heat and electricity, and its melting point is 1535 °C.

Galvanized steel pipes are often used in plumbing; they are covered by a layer of zinc to protect against oxidation.

Galvanized Steel Pipes

Galvanized steel pipes: These are made from longitudinally welded steel and protected inside and out with a galvanized coating.

Steel: Forms of Delivery

forms of delivery:

Galvanized steel pipe is manufactured in the form of rigid strips of 5 m in length and can be bent cold.

Steel: Joints

joints:

Joints with galvanized steel pipe should be threaded using the corresponding fittings.

Polyethylene Pipes

Polyethylene Pipes: Used for distribution networks of drinking water, gas, irrigation systems, etc. Polyethylene is extracted from ethylene. Depending on the polymerization process, there are three types:

Polyethylene: Types

there are three types:

• Low-density polyethylene
• Medium-density polyethylene
• HDPE

Polyethylene: Forms of Delivery

forms of delivery:

• Length-bars between 6 and 12 m.
• Rolls: 50, 100, 150 m applicable lengths in diameters below 50 mm.
• Spool: 200, 500, 1000 m for diameters and lengths of 63, 90 mm.