Q345b seamless steel pipe is an important kind of seamless steel pipe and an important material. Normally, the requirements for conditions when using q345b seamless steel pipes are relatively high. When using common q345b seamless steel pipes, pay attention to their temperature. Only when the temperature and conditions are suitable can q345b be used better. Seam steel pipe, otherwise the efficiency of q345b seamless steel pipe can not be more smoothly exerted. There are also clear regulations for the temperature used for q345b seamless steel pipes. Let's take a look at the temperature used for q345b seamless steel pipes. 

The service temperature range of q345b seamless steel pipe in GB/T 8163 standard: -20 ℃ ~ 425 ℃. GB/T 8163-2008  "Seamless steel pipes for transporting fluids" standard; this standard specifies the order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality of seamless steel pipes for transporting fluid certificate. This standard applies to general seamless steel pipes used for conveying fluids. Q345b seamless steel pipe is a kind of steel material, which can be divided into Q345A, Q345B, Q345C, Q345D, Q345E according to grade. What they represent is mainly the difference in impact temperature. Q345A level, no impact; Q345B level, 20 degree normal temperature impact; Q345C level, 0 degree impact; Q345D level, -20 degree impact; Q345E level, -40 degree impact.