Difference between Black Steel Pipe and Plastic Pipe

The time of issue:2013-12-20 8:45:23       Author:

You can know the differences between black steel pipe and plastic pipe in the following. If we regard human habitation space as a human's body, while all the laying black steel pipes like the vessels and nerves. Nowadays, the chemical composition and heavy metals dilution in the construction of water supply black steel pipelines, plastic pipes translucence, and oxygen permeability leads to the growth of bacteria and other phenomena result in deterioration of water quality, these cause serious impact on our health. The choice of black steel pipe fittings is very important to transport quality drinking water. Black steel pipe is the best choice.

Nowadays, construction water black steel pipes mostly are hidden woks and wells steel pipeline projects, if the black steel pipes improper selections will cause incalculable economic losses to investors. We will compare two commonly used water supply black steel pipe materials (black steel black steel pipe and plastic black steel pipe) from the following aspects. 1. Intensity comparison. Steel 304 and 316 which are available to most of the water treatment and transport condition are widely appeared in water industry. Strength of the material determines whether the water black steel pipes firm crashworthiness, safety and reliability.

In the case of an impact, the black steel pipe's possibility of leakage rate is the smallest, plastic pipe's leakage rate is relatively high; the pipeline is easily to be damaged by construction or re-decoration. Rise water supply system working pressure is generally greater than 0.6Mpa, so the pressure requirements are high for black steel pipe. Plastic pipe for water supply system working pressure are smaller than this value, so it is not competent. Because the mechanical properties of black steel pipe are excellent, it is able to withstand high water pressure and up to more than 10Mpa, so it is especially for high-rise water supply. 2. Thermal expansion properties and thermal insulation properties. The black steel pipe's heat expansion coefficient is 1.5 times of normal steel pipe. By contrast, black steel pipe has a slow expansion and contraction characteristics. Plastic pipe expansion coefficient is too large, this is its Achilles' heel, so it is not suitable for hot water black steel pipes.

At an ambient temperature changing condition, plastic pipes are prone to leakage and have other safety hazards, especially in the covert projects, which is more dangerous. Black steel pipe's thermal conductivity is 1/25 of copper pipe, is 1/4 of normal pipe, so it is particularly suitable for conveying hot water. 3. Corrosion resistance. The most prominent advantage of black steel pipe is its excellent corrosion resistance, it‘s the best of all the steel pipes. In order to improve the oxidation resistance of steel pipe, the steel not only contains C, Si, Mn, P, S five main elements, but also adds an appropriate amount of chromium, nickel alloy elements, to improve the oxidation resistance and corrosion resistance of steel.

In which chromium is the basic element that black steel obtain corrosion resistance. When the steel contains chromium content reaches about 12%, chromium will has an inactivation with oxidant in the corrosive media, then the steel surface will form a dense, tough protective film of chromium-rich oxide Cr2O3, this can prevent further corrosion of the steel substrate. The welded steel pipe and API steel pipe are also available.

More Steel Pipe Products, Please Click:

ERW Steel Pipe

LSAW Steel Pipe

Casing

• Prev:Different Functions of Black Steel Pipe and PV...
• Next:Development of Seamless Steel Pipe Helps You ...