the frame in place. Install the frame with the radiused flanges over the bolts with the flange against the outside of the stave. As the frame straddles a lap seam, make sure a wedge gasket is under the gasket at the seam. Work the bolts through the bottom flange of the frame. Install the nuts temporarily or enough bolts to hold the frame in place.
Install the gasket and the washer with the cup side down over the gasket on all of the seam bolts. Omit the gaskets and the washers on the chime bolts. Apply the nuts with a rounded face down on all of the bolts. Tighten them uniformly around the frame to maintain a leakproof joint.
CLEANOUT COVER - Work from the back and insert 1/2- by 1-inch bolts through the front flanges of the frame. Install the gasket along the full length of each row of bolts in the top and the bottom flanges. Allow a one bolt overlap at each end. Install the gasket along the full length of each row of bolts in the side flanges. Press the gaskets over the top and the bottom flange gaskets. Allow a one bolt hole overlap ate each end.
Apply a heavy coating of sealing compound at the overlap of the top and the side flange gaskets. Stand the cover (fig. 9-25, #6) in position with plates #7 and #8 set for direct reading, and slip the cover over the bolts. Install the gasket and the washer with the cup side down over the gasket on all of the bolts. Apply the nuts with a rounded face down on all of the bolts. Tighten the bolts uniformly around the cover to maintain a leakproof joint.
The tank erection crew must clear out all of the debris, paper, and any other matter of an inflammable nature, leaving a clean and neat installation for the pipeline crew or others. All of the tools and other erection equipment must be picked up and returned to the tank erection tool set.Continue Reading