Are generally safe to some extent both prevent theft, fire, theft waterproof function, but emphasis is different, on the market, safe material that is commonly used steel, standard steel also detailed requirements. Gap size of each gap between, that is, a method of identifying waterproof performance standards. Then, of course, with fire performance steel. But everything can not be perfect, steel is strong, security is good, but the disadvantage is also obvious that the thermal conductivity is also strong, in the event of fire, safe inevitably become "oven." This is a very contradictory "technology paradox", we can not expect too stringent. So fireproof safe is in the inner plate with some heat, fire prevention materials to more than security, the fire also. Theory is feasible, the design concept on the market most fire safe as well. Similarly, water is added to the waterproof material within the safe theft material, then the gap between the various requirements of seamless, dense impermeable. Of course, due to the different emphases, certain brands safe in their little special when it is inevitable relaxation of another performance requirements, specializing in fireproof safes, security or performance will be reduced, waterproof safe, too, which is related to costs and market structure issues such as downstream applications, and can not be generalized.