Commonly used seamless steel pipe specifications and weight

Answer 1

The following are the common specifications of seamless steel pipes:
1. ** Common materials **: 10#, 20#, 45#, 16Mn, 27SiMn, 12Cr1Mo, 15CrMo, etc.
2. ** Wall thickness grade table (some examples)**:
- For example, when the nominal diameter is 17 (A series B series 17), there are different wall thickness specifications such as 17*1.2, 17*1.6, 17*2, 17*2.5, 17*3.2, etc.
- When the nominal diameter is 21.3 (A series, B series is 18), there are 22*1.6, 22*2, 22*2.5, 22*3, 22*4 and other specifications;
- By analogy, there are also various wall thickness specifications corresponding to different nominal diameter such as 26.9 (A series, B series is 25), 33.7 (A series, B series is 32).
3. ** About weight **:
- The actual weight of the steel is calculated based on the nominal size and density (previously known as specific gravity) of the steel. The steel pipes on the market were normally heavy in theory, and the theoretical weight was mostly used when the budget was calculated. Different types of steel, such as flat steel, plated steel, angle steel, steel plate, channel steel, and round steel, had their own theoretical weight calculation methods, but the complete theoretical weight table for seamless steel pipes was not found. The weight of a seamless steel pipe is related to its size (such as outer diameter, wall thickness, etc.) and the density of the steel. For example, it can be calculated according to the formula G = L×B×H×7.85 (G is weight, L is length, B is width, and H is thickness. This formula is similar to the calculation method of steel plates. The calculation principle of seamless steel pipes is similar. The relationship between the outer diameter, wall thickness, and other dimensions and density should be considered.) However, accurate dimensional data is needed to accurately calculate.

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