Pipeline material
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Guys, what does G30, 20 steel mean? Does it refer to hot-rolled seamless steel pipes? Do you have the standard YB231-70? I can’t find the complete version online. What is the difference between it and GBT8163? Should standard 8163 include YB231?
"\"G30\" and \"Grade 20 steel\" are designations for steel grades, used to identify the composition and properties of the steel. "\"20 Number steel\" usually refers to carbon steel with a carbon content of 0.2%, and it is commonly used in manufacturing various mechanical components as well as some low-pressure containers. YB231-70 was a standard in the past, and it may refer to a specific standard for steel pipes. GBT8163 is the current **standard** for the technical specifications of seamless steel pipes, which are used for transporting fluids. As for the specific details of the YB231-70 standard and its differences from GBT8163, since YB231-70 is an older standard that may have been replaced by newer ones, it is difficult to find a complete version of it online. Generally, new standards (such as GBT8163) will include or replace the relevant provisions in older standards. If a detailed comparison of these two standards is required, it may be necessary to consult professional standardization documents or contact the relevant standard publishing organizations. .
This standard is so old that it has most likely been replaced and then abolished.
I checked, and it has indeed been abolished. It was replaced by GB 8162-1987 in 1987, and thus repealed.
G30 is used in the manufacture of special equipment, such as boilers and GC1 pipes； 20# steel is used in the manufacture of ordinary equipment and equipment operating at atmospheric pressure
The specific details of the YB231-70 standard and its differences from GBT8163: since YB231-70 is an older standard that may have been replaced by newer ones, it is difficult to find a complete version of it online. Generally, new standards (such as GBT8163) will include or replace the relevant provisions in older standards. If a detailed comparison of these two standards is required, it may be necessary to consult professional standardization documents or contact the relevant standard publishing organizations.
The standards from 70 years ago should have been abolished long ago!