http://www.umf.as/wp-content/uploads/2017/08/UMF_GN01_Issue_2_January_2017.pdf
brief description
This document compares 26 characteristics of steel tubes and thermoplastic hoses.
additional information
Thermoplastic hoses were first used in umbilical service in the mid 1970’s, with steel tubes being seriously considered in the late 1990’s with the advent of higher strength and more corrosion resistant grades of Stainless Steel. Thermoplastic hoses are relatively flexible and of low tensile strength; steel tubes are relatively stiff and of high tensile strength. To those not involved in the engineering and design of umbilicals these opposing characteristics can appear confusing. It is, however, these opposing characteristics which gives the umbilical designer a wide scope in order to technically and commercially optimise the fluid conduits and umbilical design specific to a project requirement. Such optimisation includes combinations of steel tubes and thermoplastic hoses in an umbilical (hybrid design).
