As a steel pipe that is often used in daily projects, what do you know about
seamless steel pipes? What types of
seamless steel pipes are used in different projects? After reading the following content, you may have a better understanding of
seamless steel pipes.
❶ Carbon seamless steel pipe: The commonly used manufacturing materials are No. 10, No. 20, and 16Mn steel.
❷ Low alloy steel seamless steel pipe: refers to the alloy steel pipe containing a certain proportion of alloying elements. Usually divided into two types: one is a low-alloy steel pipe containing manganese, called ordinary low-alloy steel pipe, such as 16Mn, 15MnV, etc.; the other is a low-alloy steel pipe containing chromium, molybdenum, and other elements, called chrome-molybdenum steel pipe.
❸Stainless acid-resistant seamless steel pipe: According to the different contents of chromium, nickel, and titanium, there are many varieties, such as Cr13, 00Cr17Ni14Mo2, 1Cr18Ni12Mo2Ti, 1Cr18Ni9Ti, and so on. Among these steel grades, the most used is 1Cr18Ni9Ti, which is usually represented by the simplified material code 18-8 on the construction drawing, and the applicable temperature range is -196 ~ 700 ℃.
❹High-pressure seamless steel pipe: Its manufacturing material is the same as the above-mentioned
seamless steel pipe, but the pipe wall is thicker than the medium and low-pressure
seamless steel pipe, and the thickest pipe wall is 40mm. For example, the specifications of high-pressure
seamless steel pipes for fertilizer equipment are φ14×4(mm)～273×40(mm), the length of a single pipe is 4～12m, the applicable pressure range is 10～32MPa, and the working temperature is -40～400℃.
❺ Low-temperature steel pipe: It is used more in the cold area of the imported project. Its material grades are STPL-39 and STPL-46, and the working temperature can reach -105℃. Low-temperature steel pipes are divided into two types:
seamless steel pipes and seamed steel pipes. The nominal diameter of seamless low-temperature steel pipes is 15-400mm, and the wall thickness is the same as that of carbon steel pipes; The standard length of the root canal is 6m.
After reading the above standards and boundaries for the classification of
seamless steel pipes, I believe that there will be a clearer understanding of the situation of
seamless steel pipes.
