What does dn125 mean?

What does DN125 mean?

In the fields of engineering, construction or piping, DN125 is a common specification code, but many people are not clear about its specific meaning. This article will combine the hot topics and hot content on the Internet in the past 10 days to explain the meaning of DN125 in detail, and attach relevant data and analysis.

1. Definition of DN125

DN is the abbreviation of "Diameter Nominal", which is used to indicate the size of pipes, valves or other connections. DN125 refers to pipes or fittings with a nominal diameter of 125 mm. It should be noted that the DN value is not exactly equal to the actual inner diameter or outer diameter, but a standardized reference value.

2. Application fields of DN125

DN125 specification pipes are widely used in the following fields:

1.Water supply and drainage system: Used for urban water supply and drainage pipes.

2.industrial piping: Fluid transportation in chemical, petroleum, natural gas and other industries.

3.HVAC: Hot and cold water pipes of central air conditioning system.

4.fire protection system: One of the common specifications for fire sprinkler pipes.

3. Comparison between DN125 and other specifications

The following is a comparison of DN125 and other common pipe specifications:

4. The correlation between hot topics on the Internet in the past 10 days and DN125

By searching hot content in the past 10 days, we found that DN125-related discussions mainly focus on the following topics:

1.Urban pipe network transformation: Many places have started renovation projects for old pipelines, and the demand for DN125 steel pipes has surged.

2.Environmentally friendly materials application: DN125 PE pipes have become the new favorite in the chemical industry because of their corrosion resistance.

3.Differences in international standards: European and American countries commonly use inch markings (such as 5 inches), and the conversion with DN125 has triggered technical discussions.

5. Suggestions for purchasing DN125

When purchasing DN125 pipes or accessories, please pay attention to:

1.Material matching:Select materials such as steel, PVC or PE according to the conveying medium.

2.pressure level: PN10, PN16 and other pressure markings must be consistent with the system requirements.

3.Connection method: Flange connection, welding or clamp connection needs to be confirmed in advance.

6. Summary

As a typical specification for medium and large pipelines, DN125 plays an irreplaceable role in the industrial and municipal fields. Understanding its standard definition, application scenarios and purchase points will help the efficient completion of engineering design and equipment selection. With the development of new material technology, the performance and application range of DN125 pipes will be further expanded.