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Working conditions: Liquefied gas LPG/propylene (C3H6)n transportation parameters in the petroleum refining industry: The general design inlet pressure is 13 to 16 kg, and a pump lift of 150 or above is required.: API standard petrochemical process pump VS canned pump reference manufacturer: Dalian Baolong Pump Manufacturing Co., Ltd. operates under working conditions such as liquid hydrocarbon/light oil/LPG/propylene in the petroleum refining industry. Compared with petrochemical process pumps, the canned pump produced by Dalian Baolong Pump Manufacturing Co., Ltd. has obvious advantages. 1． Flammable and explosive working conditions: Petrochemical pumps that use mechanical seals. The sealing principle is that the moving mirror ring of the mechanical seal forms a liquid film when rotating at high speed to cool the mechanical seal. There is a risk of leakage. The whole canned pump is explosion-proof and completely leak-free. Explosion-proof grade DIIBT3/DIIBT4, protection grade: IP54/IP55, more suitable for flammable and explosive working conditions ； 2． Comparison of the PLAN11/PLAN11+52 solutions in the mechanical sealing standard API682 for petrochemical process pumps based on API610 standards: The inlet pressure is too high, resulting in a short service life of the PLAN11 mechanical seal. The PLAN11+52 solution leads to excessive procurement costs. When choosing a canned pump, the pressure can be designed according to user requirements without considering the inlet pressure. 3． Use cost comparison: In addition to impellers, pump bodies and other components, two-year spare parts for petrochemical pumps generally need to be submitted for bearings/mechanical seals/shaft head nuts/shafts/bearing circlips/plum blossom pads/couplings/mechanical seal glands, etc., while canned pumps generally only need to submit bearings/shaft sleeves + thrust plates. Based on the above main points, there are advantages in choosing canned pumps in this industry.