Document o9BN6Qq8m1jX8Ye7Bgd7rrqd7

basic application SECTION 4 DUAL-TEMP EQUIPMT~S'T5T7CTU0RK Page 19 VESSEL SHELL INSUL, (cont'd.) 4B1.4 The blocks shall be applied with an en< " The" firW'cioui'se shall/be' 9 and 18 inches long. (See figure. 16) >"v 4B1.5 The ends of the blocks that butt to fixed flange covers, nozzles, supports and other protrusions shall be buttered with 30-45 sealing mastic of sufficient thickness to insure a good seal around them. (See figure 18) All other contact surfaces of the blocks (insul. to shell & insul. to insul.) shall be given a coat (1/16" *min thickness) of 4l-99 P.V.A. mastic. FIGURE 18 4B2 SECURING SHELL INSULATION 4B2.1 The shell insulation shall be secured with 6 S/S or aluminum bands, positioned as shown in figure 16. For vessel insulation having an O.D. of 36" or less 3/8" wide bands, with 1" wide block friction under each band, shall be used. 3/4" wide bands (no tape required) shall be used on insulation over 36" O.D.