Methods for Identifying the Quality of Spiral Steel Pipes1. The inner diameter of substandard thick-walled steel pipes fluctuates significantly. The reasons are: 1. Unstable steel temperature and uneven heating. 2. Uneven steel composition. 3. Due to rudimentary equipment and low foundation strength Read More

Domestically produced seamless pipes supplied according to institutional performance are manufactured from ordinary carbon steel according to GB/T700-88 Class A steel (but the sulfur content must not exceed 0.050% and the phosphorus content must not exceed 0.045%), and their mechanical properties sh Read More

Within the vast body that constitutes modern industrial civilization lies a resilient and hidden network of "blood vessels" and "skeleton." Silently weaving beneath the earth's surface, it supports skyscrapers and propels the wheels of time forward. This is the seamless steel pipe—a seemingly basic Read More