Malleable cast iron pipe fittings are made of malleable steel. It should be noted that although Ma steel is malleable cast iron with toughness, it cannot be used for forging. Ma steel pipe fittings and malleable cast iron pipe fittings are named by pipe material, while galvanized pipe fittings are named by pipe surface treatment.
Malleable steel pipe fittings are made of iron, so it is easy to rust when exposed to air. In particular, our Ma Steel pipe fittings are mainly used for fire fighting and water supply engineering. The pipe fittings are more likely to rust when exposed to humid environment for a long time. Therefore, the surface of Ma steel pipe fittings needs to be antirust treated. The surface antirust treatment of Masteel pipe fittings is generally divided into hot galvanizing and cold galvanizing. Hot dip galvanizing refers to the galvanizing treatment method of immersing the pipe fittings in the high temperature molten zinc solution of 700-800 degrees, so as to cover the surface of the pipe fittings with a layer of zinc. The principle of cold galvanizing, also known as electro galvanizing, is to transfer and attach the zinc hung on the anode to the surface of the pipe hung on the cathode, thus forming a thin and uniform zinc layer.
Ma steel pipe fittings can also be called threaded pipe fittings (threaded pipe fittings), but it should be noted that although most of the galvanized pipe fittings refer to Ma steel pipe fittings, because some welded pipe fittings or other iron pipe fittings also do galvanized treatment on the surface, in a strict sense, galvanized pipe fittings are not equal to Ma steel pipe fitting.
Black steel pipe fittings and galvanized steel pipe fittings are the two most common kind of pipe applied to transport liquid and gas. Both black steel pipe and galvanized pipe are made of steel, however, galvanized pipe has a zinc coating while black pipe does not. As a result galvanized pipe is more durable. For transportation, black steel pipe tend to erode more easily than galvanized pipe and therefore it is more suitable for transporting gas and galvanized pipe is fit for carrying water instead of gas.
Galvanized pipe fittings are covered with a layer of zinc which makes these fittings have higher ability of corrosion protection and help to prevent the accumulation of mineral deposits that will block the pipe. Galvanized pipe is mainly used for carrying water to supply home and commercial buildings; it may also serve as scaffolding frames because of its rust prevention.
Galvanized pipe fittings are used for countless outdoor and industrial applications because of the material's ability to protect against corrosion and salt. Galvanized pipe and fittings may be used in most applications with the exception of underground lines. While they work best with cold water lines, they may be used with hot water as well. The main advantage of using galvanized fittings is their superior rust resistance when compared to black and copper fittings. Galvanized pipe fittings should not be used with gas applications.
Black pipe fittings (black malleable iron fittings) are used to make connections to black iron pipe. Black iron pipe is used to transport natural and propane gas in residential applications.
Black steel pipe is manufactured as seamless which makes it a better type for gas transportation and fire sprinkler systems since it can prevent fire better than galvanized pipe. Black iron pipe is also most often use in fire sprinkler systems due to its high heat resistance and for water supply lines due to its resistance to water damage. Since it has a dark color surface which is formed by iron oxide during the manufacturing process, it is called black steel pipe.
The main difference between steel pipe and galvanized pipe lies in the surface. Black steel pipe is uncoated and made without steam, and therefore, it is widely used for transporting gas like propane and natural gas to residential and commercial building.
Galvanized pipe has zinc on the surface so the mineral will flack off as time goes by and block the pipe. This will lead to a burst. In view of this, transport gas by galvanized pipes is dangerous so it is often used in carrying water.
Black steel pipe, on the other hand, is not suitable for water transport. Black steel pipes tend to corrode in water and mineral of the pipe will dissolve into the water and clog the line as well.
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