1.1 ,This test method covers the measurement of the steady-state heat transfer properties of pipe insulations. Specimen types include rigid, flexible, and loose fill, homogeneous and nonhomogeneous, isotropic and nonisotropic, circular or non-circular cross section. Measurement of metallic reflective insulation and mass insulations with metal jackets or other elements of high axial conductance is included, however, additional precautions must be taken and specified special procedures must be followed.