... indicated by a vertical bar and a small 08 Welded Tanks for Oil Storage API STANDARD 650 ELEVENTH EDITION, JUNE 2007 ADDENDUM 1, NOVEMBER 2008 08 Welded Tanks for Oil Storage Downstream Segment API ... plate-as-rolled tested) WELDED TANKS FOR OIL STORAGE 4-9 Table 4-3b—(USC) Material Groups (See Figure 4-1 and Note Below) Group I As Rolled, Semi-killed Material Group II As Rolled, Killed or Semi-killed ... the specified service gasket 4.9.3.3 Except for stainless steel bolting, flange bolts and nuts used for testing are acceptable for use in the completed tank WELDED TANKS FOR OIL STORAGE 5-3...