The difference between the national standard spiral steel pipe and the standard spiral steel pipe?

The standards implemented within the domestic spiral steel pipe industry are roughly divided into two categories: national standards and departmental standards. Some claim to be the national standard and some are the landmarks. Are they consistent or conflicting? Here's a brief introduction to what is the national standard? What is the landmark?
The national standard spiral steel pipe is not difficult to understand from the surface. Simply speaking, it is a spiral steel pipe that complies with national standards. What is the national standard? The national standard spiral steel pipe is mainly based on the standard GB/T9711-1997 petroleum and natural gas industrial transmission steel pipes, including GB/T9771.1 (representing Grade A steel) and GB/T9711.2 (representing Grade B steel), among which GB9711.2 It is generally applicable to steel pipes for the transport of flammable fluids, and the overall quality is higher than that of GB9711.1. GB/T9711 specifies the non-alloy steel and alloy steel (excluding stainless steel) seamless steel tubes for conveying flammable fluids and non-combustible fluids, including water, in the basic quality and test requirements (Level A). And welding steel pipe delivery technical conditions.
The standard spiral steel pipe is the standard of the Ministry of Petroleum. The implementation standard is SY/T5037-2000 (spiral submerged arc welded steel pipe for ordinary fluid transmission pipelines). In short, 5037 is a steel pipe for normal flow transmission pipes, and 9711 is for industrial transportation. Steel pipe, including the thickness requirements, the requirements for the steel pipe of the department mark are lower than those of the national standard. The national standard spiral steel pipe has strong pressure bearing capacity and is easy to be welded. It is mainly used for the transportation of petroleum and natural gas pipelines. The partial standard spiral steel pipe is generally used for submerged arc welded steel pipes for general low pressure fluid transportation such as water, gas, air and steam.