2. Metal cracks refer to irregular-shaped cracks or lines on the metal surface, similar to the way the metal is torn. There are many reasons for this situation, mainly due to the insufficient heating temperature of the metal. The hard perforation operation causes the metal to tear. The solution is to control the temperature of the heating furnace.
4. The size of the steel pipe is unqualified and exceeds the standard allowable error of the steel pipe, such as 10% of the outer diameter and wall thickness, which is caused by the inability to sizing during the rolling process. In this case, there is also the phenomenon of off-wall or eccentricity, and it is often easy to occur that one side is thick and the other is thin.
Tips: ASTM A106 seamless pressure pipe (also known as ASME SA106 pipe) is commonly used in the construction of oil and gas refineries, power plants, petrochemical plants, boilers, and ships where the piping must transport fluids and gases that exhibit higher temperatures and pressure levels.