The surface quality requirements of 07MnNiMoDR steel plate

07MnNiMoDR steel plate surface quality:
The surface of 07MnNiMoDR plate is not allowed to have defects such as cracks, bubbles, scabs, folds and inclusions. If there are the above surface defects, it is allowed to clean them. The cleaning depth from the actual size of the 07MnNiMoDR steel plate shall not exceed half of the thickness tolerance of the steel plate, and the minimum thickness of the steel plate shall be ensured. The defect cleaning place shall be smooth without edge corners, and the 07MnNiMoDR plate shall not have delamination.

Other defects are allowed to exist, and the depth from the actual size of the 07MnNiMoDR steel plate shall not exceed half of the thickness tolerance of the steel plate, and the thickness of the defect shall not be less than the allowable thickness of the steel plate.

07MnNiMoDR steel plate is widely used to build - 50℃ low temperature ethylene / propylene spherical tank. -50℃ low temperature spherical tank is the key storage equipment of ethylene / propylene plant. Due to high design pressure, low temperature, flammability and explosion, and high technical index requirements, the construction level of low temperature ethylene / propylene spherical tank basically represents the highest level of spherical tank construction in a country or region.