What are the differences between unified steel grades based on different standards?
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There are two types of steel pipes in a project, both made of 20# steel; one complies with the GB/8163 standard while the other adheres to the GB9948 standard. I have two questions for fellow sailors: 1. What are the differences between these two types of steel pipes? 2. Why are two sets of standards required for the same material? What is the underlying reason for this?
Differences between GB/T8163 and GB9948 standards: GB/T8163-1999 Seamless steel tubes for transporting fluids: Applies to general seamless steel tubes used for transporting fluids. GB9948-88 Seamless steel tubes for petroleum cracking: Seamless steel tubes suitable for use as furnace tubes, heat exchanger tubes, and pipes in petroleum refineries. http://wenku.baidu.com/link?url=h3sogRSGoztrYQht2fPJZZeIWbcCXxtL1Mctnkjaha-R_k6MV-4LtcTk9EOvz26jVIiOKsXk-3SIUrSt8giCcLlmpRw3pBxqaNtH41VTFBO
There are many standards for 20#. The most fundamental ones are GB/T 8163 and GB 3087; these two standards cannot be used for GC1 pipes. There are also GB9948, GB6479, and GB5310. The main difference lies in the inspection methods; standards with higher requirements specify more inspection methods for steel pipes, and those methods are more stringent. If you have time to look up the standards and read them, you will notice the differences.
Thank you, President Wang:victory:
Doudouyang was able to find it right away. . . :lol
I support and agree with the replies from the 2nd and 3rd floors.