And other exposure to the atmosphere by materials, stainless steel also dirty. Factors influencing the design of maintenance and cleaning costs included in the rain erosion, artificial irrigation, and have a mutual relationship between the dirty surface. Through the slab is placed directly in the same place and in a shed in the atmosphere to determine effect of rain erosion. Artificial irrigation through the effect of artificial sponge covered with scrub the soapy water every six months of each strip to the right to determine. Found, and out of the shed and not washing place and the Strip than by rain erosion and deposition of artificial scrubbed to remove surface dust and has a good effect on the surface. And also found that the condition of surface processing also affect, smooth surface of the Strip is better than strip effect of surface roughness. Therefore washing intervals under the influence of various factors, the main factors affecting aesthetic standards are required. While many stainless steel curtain wall only scratches the glass be washed when, however, generally, for external stainless steel washing twice a year.304 304 hot rolled stainless steel pipe