Classification of pipe base materials

The classification of pipe base materials is usually determined based on its chemical composition, mechanical properties, heat resistance, and corrosion resistance. In the welding industry, different types of steel are classified according to standards published by organizations such as the American Welding Society (AWS) and the International Organization for Standardization (ISO). For example, standards such as AWS D1.1 or ISO 15614 give specific guidelines for judging different types of steel. 12Cr1MoVG is a common low alloy steel that is widely used in large-diameter pipes for high-pressure and ultra-high-pressure power station boilers. Its classification is mainly based on its chemical composition, heat treatment status and other factors. Among them, "12Cr" means that the chromium content of this steel is about 12%, "1Mo" means that it contains about 1% molybdenum, and "VG" means that the steel type has been vacuum refined (Vacuum degassing). To determine whether 12Cr1MoVG belongs to the "red box" you mentioned, we need to know which classification standard or list the "red box" you mentioned specifically refers to. If you have a specific classification table or some standard documents for welding or manufacturing, you can usually determine which category 12Cr1MoVG should be classified into based on the chemical composition range, mechanical performance indicators and other information given in the table. Since there is no specific "red box" and its related classification basis provided, the exact classification result cannot be given. It is recommended to consult relevant material standards, boiler and pressure vessel usage standards, or consult a professional materials engineer to obtain more precise classification information. .

Hello, sir, can I find the specific national standard and electricity meter? Thank you.