Steam Reactivation

MIL-HDBK-1130

tubular gauges, illuminators, and floor mirrors, should be removed, cleaned,

and stored in a safe place; water legs of all gauges should be drained, and

fragile parts of instruments and controls should be removed, wrapped, and

labeled. Vents should be plugged or covered to exclude dust, according to the

manufacturer's recommendations. Operating panels and control devices that

cannot be stored should be protected from dirt and moisture by shrouding with

plastic film. Testing equipment should be collected and stored where it may

be easily located. Chemical solutions should be removed from portable flue-

gas analyzers and discarded; all liquid should be drained from the water

jacket around the measuring burette. If warm storage is not available, extra

chemical refills should be transferred to the nearest active installation.

2.5.2

General. Certified boiler inspectors should inspect boilers and

2.5.2.1

pressure vessels internally and externally, as well as hydrostatically before

they are fired. All deficiencies should be corrected. Thoroughly flush out

boilers and other pressure parts, auxiliary equipment, and connecting lines

with an alkali solution to remove all traces of oil; wash out completely all

accumulations of mud and scale. Remove caps and blanks from connecting lines,

reconnect all lines and piping; repair drilled or tapped drainage holes made

during deactivation. Replace all clean-out and drain plugs. Painted surfaces

of castings, structural supports, and similar parts of equipment that show

signs of corrosion should be cleaned and retouched with a suitable paint.

Sheet metal that is not zinc-coated should be painted.

2.5.2.2

Boiler Plants. Remove all desiccant bags, lime trays, wood

blocking, tools, and other foreign objects before securing manhole and

handhole plates. Clean gaskets; use new ones if necessary, and coat them with

a suitable graphite paste to prevent sticking when they are to be removed.

a)

Drums and Tubes. If gasketed joints on drums and tubes have

been broken, new gaskets must be installed. All joints that

have water or water and steam on one side and dry steam on the

other should be absolutely tight. Check all drier screens to

ensure they are spaced correctly.

b)

Superheaters. For the ball-jointed type of superheater,

individual elements should be reconnected. Remove grease and

protective wrappings. The superheater safety valve should be

set for a lower pressure than the boiler drum safety valves and

checked for proper operation.

c)

Air Heaters.

Open air heater inlets and dampers.

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