新版《容规》对压力容器专用钢中的碳素钢和低合金钢材中的硫、磷含量加以限

The new version of the "Capacity Regulations" restricts the sulfur and phosphorus content of carbon steel and low-alloy steel in special steel for pressure vessels. The basic requirements for carbon steel and low-alloy steel are ≤0.03%, ≤0.02%; Design temperature is lower than 20℃ and standard tensile strength lower limit is less than 540MPa steel, ≤0.025%, ≤0.012%; used for steel design temperature lower than -20℃ and standard tensile strength lower limit is greater than 540MPa, ≤ 0.02%, ≤0.01%; Q245R and Q345R are the most widely used pressure vessel carbon steel and low alloy steel. The amount of Q345R steel plate has exceeded 50% of the amount of carbon steel. As the thickness of the plate increases, the plate is allowed The stress will also change, so this problem should be paid attention to when using thick-walled panels instead of thin-walled panels. It is not that the thicker the better. Often the delamination of thick-walled panels will be more obvious, and the subsequent testing will be more stringent. .

The new version of the "Regulations" limits the sulfur and phosphorus content of carbon steel and low alloy steel in pressure vessel-specific steels, wherein carbon steel and low alloy steel basic requirements, ≤0.03%, ≤0.02%; Steel for 40MPa, ≤0.025%, ≤0.012%, steel for design temperatures below -20 degrees C and standard pull strength lower limits greater than 540MPa, ≤0.02%, ≤0.01% The most commonly used in pressure vessel carbon steel and low alloy steel are Q245R and Q345R, the amount of Q345R steel plate has exceeded 50% of the use of carbon steel, with the increase of sheet thickness, plate stress should also change, so when using thick-walled plate to replace thin-walled plate, not the thicker the better, often thick-walled plate layering phenomenon will be more obvious, followed by more stringent detection.

The new edition of the code limits the content of sulfur and phosphorus in carbon steel and low alloy steel for pressure vessel. The basic requirements for carbon steel and low alloy steel are ≤ 0.03% and ≤ 0.02%; for steel with design temperature lower than 20 ℃ and lower limit value of standard tensile strength less than 540Mpa, ≤ 0.025% and ≤ 0.012%; For steels with design temperature lower than - 20 ℃ and lower limit value of standard tensile strength greater than 540Mpa, ≤ 0.02%, ≤ 0.01%; Q245R and Q345R are the most widely used carbon steel and low alloy steel for pressure vessels, and the amount of Q345R steel plate has exceeded 50% of the carbon steel consumption. With the increase of plate thickness, the allowable stress of plate will change, Therefore, we should pay attention to this problem when using thick wallboard instead of thin-walled plate. The thicker the wall is, the better the delamination phenomenon of thick wall panel will be more obvious, and the following detection will be more strict.<br>