What standard is followed for the thickness limits of post-weld heat treatment on compressed components made of alloy steel?
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Clause 4.4.1(2) of the pot specifications: The thickness limit at which welded alloy steel pressure components require heat treatment is to be determined in accordance with the relevant standards； What standards do “in accordance with the relevant standards” refer to here? I only found something in DL/T869; what about superheaters used in boilers that are not for power generation? What standards should be followed?
For water-tube boilers, the provisions specified in 9.3.5 Heat treatment conditions of GB/T16507.5-2013 can be followed； For the material grade Fe-X, refer to Table 2 of NB/T47015-2011. There should be corresponding regulations in GB/T 16508-2013 for shell and tube boilers.