20 Which has higher strength, GB3087 or 20 GB8163?
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I have a gentle question: for boilers, steel pipes with specifications φ32×3 and grade 20 are used, with an operating temperature of 154°C. I would like to know which standard is more stringent – GB8163 or GB3087. Table 2-2 in the Boiler Safety Technology Inspection Regulations states that for grade 20 steel under GB8163, the operating pressure should be ≤1.6 MPa and the operating temperature ≤350°C; whereas for grade 20 steel under GB3087, the operating pressure should be ≤5.3 MPa and the operating temperature ≤460°C. Some people say that based on this, grade 20 steel under GB3087 has higher strength. Is that correct?
The last edit to this post was made by 450239777 on 2019-8-26 at 21:05. No, the stresses for both are the same; it’s just that different standards apply depending on the operating conditions. The new draft standard GB/T16507 \"Water-tube boilers\" has unified the stresses for these two types of pipes.
The supply status varies depending on the fixed length and the inspection items.
Why is it that in GB150.2, only 8163 is listed and not 3087?
3087 is used for boilers, and 8163 is used for containers; there’s no reason for this – it’s a standard requirement
There are many other indicators besides performance; phones or computers with the same CPU can run at different speeds, and their quality varies greatly
It seems what you said doesn’t match the regulations on boiler safety inspection
It’s just that due to different standards, the quality control of materials varies. It has little to do with strength. Additionally: In accordance with our **standards, the materials used for manufacturing boilers are generally selected from the standards referenced in the boiler regulations, while the materials used for manufacturing pressure vessels are generally selected from GB150.