ASME B31.3-2016 PWHT Exemption

[JARivera1]

Table 331.1.3 Exemptions to Mandatory PWHT; simple question: fourth column header referrers Notes (3)-(5); it is mean that notes 3, 4 and 5 apply? to me yes, but may be a gap for somebody that 3 and 5 only; normally when is not well applied; if the designer has specified PWHT in the piping specification; this can not be waived specially in LTCS; any advice is welcome

 

[GD2]

You are right. Notes 3, 4 and 5, all apply.
Note 4 states that if the PWHT is specified by a Designer or WPS, exemption to PHWT is not allowed.