Flexible hoses are hose-related parts that are resistant to bending, twisting, vibration, etc. Flexible hoses are suitable for adjusting piping errors and absorbing vibrations. The material of the hose is stainless steel, copper, fluoropolymer, etc. Stainless steel and copper are hard materials, but the structure is devised to be corrugated, making them flexible hoses like rubber tubes. Using a product that uses union fittings at both ends of the hose together with a flexible structure improves workability. In addition to water and air, there are products that can use gases, oils, solvents, etc., and can be used for a wide range of applications. The stainless steel hose with a non-weld integrally molded flange is effective not only for anti-vibration of various pumps but also for countermeasures against earthquakes and land subsidence.