Is there a standard for pipe wall thickness?
Thread Content
Everyone, is there a standard for pipe wall thickness? What is the wall thickness of DN25? Some colleagues are 3.5, some are 4, and some are 5. I don’t know which one is right?~
The outer diameter of the pipe is divided into different systems. It can be found in relevant standards or hardware brochures. There are many wall thicknesses such as 2.5, 3, 3.5, 4... etc.
Standards, different pipe pressures, different pipe numbers, different wall thicknesses are different. . . . . . sweat. . . Is this the most basic pipeline design?
Yes! All pipe wall thicknesses are specified! It depends on what standard you use!
Generally, according to the specifications, the required pipe wall thickness is calculated based on the allowable stress of the pipeline material at the design temperature, the temperature correction coefficient for the formula for calculating the pipe wall thickness, the pipeline electric welding seam coefficient, the added value of the pipe wall corrosion allowance, and the pipeline design pressure. After rounding, the pipe with the most commonly used wall thickness that can be purchased in the market is selected. Technical support
According to different pipe gauges and pressure levels, wall thickness specifications include 3.38, 4.55, and 6.35mm. See GB/T12459-2005 for details
It depends on which standard your unit adopts. For example, the ASME standard has clear thickness levels. The thickness is selected based on the pressure level.
Of course there are standards. Pipe wall thickness standards are divided into metric pipes and imperial pipes. You can check HG/T 21635 and SY/T 0510.
You can check the schedule table, which has detailed instructions.
There are of course standards for pipe wall thickness. American standard pipes are divided into 15 levels, namely: SCH5S, SCH10S, SCH10, SCH20, SCH30, STD, SCH40, XS, SCH60, SCH80, SCH100, SCH120, SCH140, SCH160, XXS. Of course, there are not that many commonly used levels, only STD, S40, S80, XS, and S160. The standard number is: ANSI B36.19. This post was last edited by huangying1978 on 2009-4-18 07:37 ]
In the ordinary market, there are generally more outer diameters of 32. Not all national standard pipe diameters are common in the market, and there is also the problem of difficulty in purchasing.
There are many types of steel pipes: Seamless steel pipes for hot-rolled structures, seamless steel pipes for cold-rolled structures, seamless steel pipes for fluid transportation, straight seam electric welded steel pipes, welded steel pipes for low-pressure fluid transportation, welded galvanized steel pipes, seamless steel pipes for low- and medium-pressure boilers, stainless steel seamless steel pipes for structures, stainless steel seamless steel pipes for fluid transportation, seamless steel pipes for petroleum cracking, ... too many. These types of steel pipes are all produced in my country * * standard. There are standard series for engineering pipe diameter and wall thickness. Even so, there are too many equipment and tooling for steel pipe manufacturing. Each factory can only produce a limited number of steel pipes. If there are no standards, steel pipe manufacturing units cannot produce, and it will be even more troublesome for users. It is recommended to look at the standards to find out.
Wow, let’s see how much pressure the design can bear. There is a comparison table! ! Do you want me to give you one? !
Check to see which standard your pipes use. The corresponding standard corresponds to the corresponding pipe wall thickness.
It mainly depends on which standard pipe you choose. Only by knowing the standard can you know the outer diameter of the pipe. As for the wall thickness, it is calculated by formula and then rounded. The thickness also depends on the standard. Generally, the higher the pressure and temperature, the thicker the wall thickness.
Pipe wall thickness is specified in relevant standards. I haven't heard of separate standards.
GBT 17395-2008 Seamless steel pipe size, shape, weight and allowable deviation I often use this standard
There must be a standard for pipe wall thickness, but there is not one standard.
Check the process piping design specifications yourself. There are national standards.
The selection of pipe wall thickness can only be determined through calculation based on the design temperature and design pressure of the pipe under established standards.