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ASME B31T-2015 pdf free

ASME B31T-2015 pdf free.Standard Toughness Requirements for Piping.
Low-temperature service requirements are contairwd in Table 3.1-I. These requirements are es*ahlislwd for 1-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-i.
3.2 MaterIal Groupings (Column 1 of Table 3.1-1)
Material 1-number groups for each coserrd material specification are pnwided in Table 3.2-I, (In addition, a table sorted by material type and T-number group that Lists aU materials in each T-number group is provided in Mandatory Appendis Ill.) In determining the applicable T-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 note% The tible %-p.tr.itrs the materials into types (car hon steel, lowallos 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. Low-temperature service limits shall be determined from Table 3.1-). An “(Ar in the 1-number group ie.g., CS -2(A)I indicates that materials of that group may not be wed at temperatures colder than the group number leg., -29°C (-2(IF)l.
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 signifianIlv according to the thickness, a thickness is listed in column 2 of Table 3.1-I. Note that the thickness is the nominal thickness s defined In the cnde or specification relererwing this Code. The variation based on thickness applies to carbon steel T-numbcr groups CS A. CS B, CS C, and CS D where Table 3.1-1 lists thickness at each 1O’F inctenwnt. When it is desired to refine the influence of the thickness, Mandatory Appendis I provides the continuoi curves and tables that can he used at intermediate values or greater thickjwss. Since 11w nominal thicknesses in Table I.) of Mandatory Appendiz I are generally derived based on uniform increments of temperatUre. the table does not contain uniform increments of thickness. Again, the contlnuous curses in Mandatory Append is I should be consulted for the precise values.
hir material T-number groups where the low- temperature suitability is dependent on some other factor. those factors are given in the notes listed in column 3 of Table 3.1-1.
3.4 Low-Temperature Service Limit (Column 4 of Table 3.1-1)
Column 4. the first temperature column in Table 3.1.1, Is 11w low-temperature service limit, lithe design minimum temperature is equal to or warmer than this value, then low-temperature requirements do not apply. Materials within a group may be used at this temperature or temperatures warmer than this limit without imposing any of the requirements of this Code. This hrnit considers material properties and the influence of fabrication proccsses on the material properties.ASME B31T pdf free download.

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