Pipes and fittings
Galvanized steel pipes are divided into two groups: galvanized steel pipes and galvanized iron pipes. These two types are known as white iron pipes in the market and are generally not distinguished between the two, whereas galvanized steel pipes are compared. Its iron is lighter and shiny.
Galvanized steel pipe and fittings
The steel pipes themselves are made in several ways. Seamless tubes that have no longitudinal seams are made by extrusion, and seam tubes that are initially cylindrical and then seam welded.
They are then galvanized to increase the resistance to acids and rust. These tubes are less resistant to acids than ferrous ones, and all acids that are harmful to cast iron also corrode galvanized steel.
Galvanized iron pipe and fittings
The pipes are made of white iron, which is welded together by welding seamers and then immersed in the molten metal. That's why they are also called seam tubes. These tubes are known for their dark color and gray, and are generally produced in light and medium form.
All galvanized steel and iron pipes are manufactured in 4m branches. The diameter of these pipes is usually the nominal diameter that is larger than the inner diameter and smaller than the outer diameter.
Also in the market these tubes are known by score. Galvanized pipes are also screwed together by a rib and sealed with suitable materials.
Due to the high resistance of copper pipes, these pipes are widely used in installations, air conditioning and water supply. In B88 standard of ASTM Society copper pipes are divided into types M, L, K and DWV.
The letters M, L, K and DWV represent the wall thickness of the copper pipes. External Diameter All types of copper pipes are equal for a given diameter. Copper pipes of type M, L, K can be either of hard drawn or soft (annealed temper) type.
Cast iron pipes:
These pipes are made of cast iron and depending on their application, the types and amount of alloy, shape and length of pipe are different and are often used in sewage systems.
Seamless steel pipes are used when the fluid temperature is high. Three standard ANSI, BS, DIN standards are commonly used to select steel pipes.