Question 1: What is GB/T 14976-2012 and what is it formulated for?
GB/T 14976-2012 is a national standard of the People's Republic of China, and its full name is "Stainless Steel Seamless Pipe for Fluid Transportation". This standard is specifically formulated for stainless steel seamless pipes for conveying fluids (such as water, gas, oil, etc.) in industry, and specifies key indicators such as the manufacturing process, chemical composition, mechanical properties, and dimensional tolerances of steel pipes.
Question 2: What is the scope of application of GB/T 14976-2012?
Material Type
It covers common materials such as austenite, austenite-ferrite duplex stainless steel, such as 06Cr19Ni10 (304), 022Cr17Ni12Mo2 (316L), etc.
Application Field
It is suitable for high-pressure or corrosive medium transportation in industries such as petroleum, chemical, food, and pharmaceuticals.
Question 3: What are the dimensions and tolerance requirements for steel pipes in GB/T 14976-2012?
The outer diameter range is 6-630mm, the wall thickness is 0.5-30mm, and the specific tolerance is graded according to the outer diameter and wall thickness (such as outer diameter ±1%, wall thickness ±10%).
Question 4: What are the characteristics of GB/T 14976-2012 compared with international standards?
This standard is equivalent to ISO1127:1992 and ISO4200:1991, but the requirements for corrosion resistance tests (such as intergranular corrosion) are stricter than international standards.
Question 5: Is GB/T 14976-2012 applicable to non-fluid transportation scenarios?
Although the standard is mainly for fluid transportation, if other scenarios (such as structural support) have similar material performance requirements, they can also be used for reference, but additional verification of load capacity is required.
Question 6: What is the difference between GB/T 14976-2012 and GB/T 8163?
GB/T 8163 is applicable to carbon steel and low alloy steel, while GB/T 14976-2012 is dedicated to stainless steel and has higher requirements for corrosion resistance and purity.
