Hey expert, please teach me what the device parameters mean
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Steel pipe: Dg80YB804-70, Dg100YB231-70. What are the differences between these two? Flanges: Pg6, Dg100HG5010-58. Supports: JB/T4725-92. Materials: Q253-A, 0Gr18Ni9; there’s also one with 1Gr – I forgot the name. What are the differences between them? Please advise, experts
Q253-A is a type of carbon steel, and its use is now prohibited in boilers and pressure vessels. 0Gr18Ni9 is probably written incorrectly; it should be 0Cr18Ni9, a type of stainless steel material. The current designation for it is likely 06Cr19Ni10. JB/T4725 is the **standard number** for ear-type manufacturing. Flange: HG5010-58 is the standard number. Pg6 probably refers to the nominal pressure rating, that is, 6 kilograms of pressure, while Dg100 likely denotes an engineering diameter of 100 mm. Steel pipe: Similar. Also, where did the original poster get this information from? The standards seem to be the old ones, which are already outdated. If there are any mistakes in the answers, please feel free to point them out.
These are the parameters for our graduation project; they indeed belong to the old standard from 2006