UL 142:10ED 2019-05-17

This revision of ANSI/UL 142 dated January 21, 2021 includes the following changes in requirements: – Revising Section 35 – 38 requirements for revised OSHA references to correct current inaccuracies; 36.1, 36.3 – 36.5, Section 37, Section 38, 52.1.1 – Add requirements for double wall manways for aboveground tanks; 9.6, Figure 9.5, Table 9.5 – Revise Table 23.1 to reverse a change made in error – Leakage Test revisions to differentiate between requirements for Performance and Production testing; 42.2.1 – Addition of section for Alignment of Structural Members; Section 50A – Editorial corrections; 1.3, 8.5, 8.6, Table 8.1, 8.9, 12.2, 12.3, 23.4, 52.1.1, 53.4

These requirements cover steel primary, secondary and diked type atmospheric storage tanks intended for noncorrosive, stable flammable and combustible liquids that have a specific gravity not exceeding 1.0 in aboveground applications,except for tanks storing liquids with a specific gravity that exceeds 1.0, covered in Section 12.