ASME B31T-2010 pdf free

ASME B31T-2010 pdf free.Standard Toughness Requirements for Piping.
Low-temperature service requirements are contained in Table 3.1-1. These requirements are established for T-number groups of materials with similar requirements. In addition to T-number group, in some cases requirements are dependent on thickness and/or other characteristics as listed in Table 3.1-1.
3.2 MateriaL Groupings (Column 1 of Table 3.1-1)
Material T-numher groups for each covered material specification are provided in Table 3.2-1. (In addition, a table sorted by material type and T-number group that lists all materials in each T-number group is provided in Mandatory Appendix III.) In determining the applicableT-number group for a material from the table, consideration shall be given to the material specification, grade, and any other variables as established in the notes. The table separates the materials into t)rpes (carbon steel, low alloy steel, etc.), and the group number is representative of the low-temperature service limit for the material; however, the low-temperature service limit may vary based on the design and fabrication requirements. l.ow-temperature service limits shall be determined from Table 3.1-1. An “(A)” in the T-number group Ie.g., CS —20(A)J indicates that materials of that group may not be used at temperatures colder than the group number (e.g., —20°F (—29°C)I.
3.3 Nominal Thickness and Notes (Columns 2 and 3 of Table 3.1-1)
For material T-number groups where the low- temperature suitability varies significantly according to the thickness, a thickness is listed in column 2 of Table 3.1-1. Note that the thickness is the nominal thickness as defined in the code or specification referencing this Standard. The variation based on thickness applies to carbon steel T-number groups CS A, CS B, CS C, and CS D where Table 3.1-1 lists thickness at each 10°F increment. When it is desired to refine the influence of the thickness, Mandatory Appendix I provides the continuous curves and tables that can be used at intermediate values or greater thickness. Since the nominal thicknesses in Table 1-1 of Mandatory Appendix I are generally derived based on uniform increments of temperature, the tables do not contain uniform increments of thickness. Again, the continuous curves in Mandatory Appendix I should be consulted for the precise values.For material T-number groups where the lowtemperature suitability is dependent upon some other factor, those factors are given in the notes listed in column 3 of Table 3.1-1.ASME B31T pdf free download.