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Hydrocleaning, high-pressure cleaning or waterblasting, are terms which describe the use of water propelled at high speeds to clean surfaces and materials. By focusing and pressurizing the water stream, the force generated can remove films and materials such as paint from walls, metal, and highways, rubber from airfield runways, sealants and membranes from concrete and chewing gum from sidewalks. ==Pressures== In order to standardize cleaning operations and surface preparation specifications, the Steel Structures Painting Council (SSPC) has adopted the following four definitions for cleaning operations using water jetting technology: *Low-pressure water cleaning (LP WC) uses water pressure less than 5,000 psi (34 MPa); *High-pressure water cleaning (HP WC) uses water pressure between 5,000 to 10,000 psi (34 to 70 MPa); *High-pressure water jetting (HP WJ) uses water pressure between 10,000 to 25,000 psi (70 to 170 MPa); *Ultrahigh-pressure water jetting uses pressures above 25,000 psi (170 MPa). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hydrocleaning」の詳細全文を読む スポンサード リンク
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