Many people believe that there isn't much difference between seamless and welded stainless steel pipes, and that as long as the inner wall of the welded pipe is smooth enough and the overall quality is good, it can be used as a substitute for seamless pipes.

The OCTG casing size chart is an important reference document for oil and gas drilling operations. Casing is installed in oil and gas wells to stabilize the wellbore, isolate formations, and prevent wellbore collapse under high pressure and high temperature conditions.

ASTM A213/A213M is a standard specification for seamless ferritic and austenitic alloy steel boiler, superheater, and heat exchanger tubes, established by the American Society for Testing and Materials (ASTM).

U-shaped steel sheet pile dimensions play a critical role in determining structural performance, installation efficiency, and overall project cost. Widely used in cofferdams, retaining walls, riverbank protection, and foundation support, U-shaped sheet piles are valued for their symmetrical cross-section, strong interlock performance, and ease of reuse.

The quality inspection of welds in welded galvanized steel pipes mainly includes three categories of methods: visual inspection, non-destructive testing, and destructive testing.  

Hot-dip galvanized steel pipe is a type of steel pipe whose surface has been treated with hot-dip galvanizing. Although most hot-dip galvanized steel pipes commonly found on the market are welded pipes (such as ERW), seamless steel pipes can also be produced and supplied after hot-dip galvanizing – that is, hot-dip galvanizing is applied to regular seamless pipes to enhance their corrosion resistance.