... other piping systems, use of units such as power plants, water plants, mills, water companies, engineering and construction.[Media] : Common type used ... to transport -15-- 115 centigrade air, compressed air, water, sea water, oil, acid and alkali. Special type used to transport ... could reach to-30--+25 degreeMediaAir, compressed air, water, sea water, hot water, oil, acid and alkaliKey Data: DNLength L( ...