How often should a war reserve case be inspected?

Grade the storage environment, then adjust from the last result: twenty-four months dry, six in a shed, three under observation.

Can a failed seal be found without opening the case?

Only in part. Loose latches and cracked corners show from outside; desiccant gain and gasket set need the lid open.

How much desiccant gain counts as failure?

Set it from charge weight and cavity volume and record it. Once passed, replace the gasket too; a new charge alone leaves the leak in place.

Must the case be re-sealed right after opening?

Within seventy-two hours. Beyond that the cavity has balanced with the room and the case is sealed as new.

Can a gasket be cleaned and reused?

Cleaning removes soil, not compression set, so the verdict rests on set alone. ---

War Reserve Case: Sealing, Inspection and Opening Control

Quick answer: A war reserve case is sealed by procedure, not by pressing the lid shut. Four conditions are confirmed before the latches close, three numbers are written into the record, and the inspection interval is then set from leakage risk rather than from the calendar. Two measurements show whether the seal held over the term: desiccant weight gain and gasket compression set. Both need a baseline taken on the day of sealing.

Four checks before a war reserve case is sealed
The sealing job: desiccant, gasket and records
How to set the inspection interval
The order of an opening inspection
Linking opening and re-sealing
FAQ

1. Four checks before a war reserve case is sealed

A war reserve case stays open until four conditions pass: the rim seats a gasket, the gasket holds compression, the desiccant charge suits the cavity, and the record is ready. A failed item is replaced, not sealed over. A term runs for years, so a fault accepted in the first hour travels to the end of it.

Close-up of the black gasket seated in the rim groove above a hollow rib

The rim groove must carry one continuous gasket, free of dried adhesive and grit, and the hollow rib at each corner is the thin-wall zone where cracks start. Compression set is measured on the bench, and past thirty per cent the gasket is replaced. A permanently flat part cannot be recovered by cleaning.

2. The sealing job: desiccant, gasket and records

Three actions leave three marks: weigh the desiccant, fasten the latches in order, file the record in three places. A short sequence is still easy to break. Desiccant dropped in after the lid is latched sits outside the cavity, the same as fitting none.

Grey case open: moulded clips in the lid, coiled hose in the base cut-out

Liner and gasket interfere. Moulded clips and a base cut-out set how flat the liner sits; a proud clip lifts the rim until the gasket unloads. The desiccant bay sits clear of the compression line under a one-handed cover. Close corner to corner, press the mid-span, fasten in opposing pairs, then even the overlap.

3. How to set the inspection interval

The interval follows leakage risk, not the calendar. An open shed can need three times the attention of a dry store. Grade the environment first, then let the last result move the case between grades.

Two rows of olive long cases upright in a store, aisle between them

Storage	Walk-round	Opening	Escalate when
Climate-controlled	Quarterly	24 months	Humidity high
General store	2 months	12 months	After any move
Open shed	Monthly	6 months	Wide swing
Under observation	Monthly	3 months	Two passes

A walk-round stays outside: latches, corners, label recess, floor water. Only the opening inspection touches the gasket and weighs the desiccant. The table gives a ceiling; a case under observation moves down a grade at once.

4. The order of an opening inspection

The sequence is exterior, opening resistance, gasket, desiccant weight, inner wall, non-destructive first. Order is not cosmetic. Weigh the desiccant after the lid has stood open and the cavity has already breathed, and the reading means nothing.

Olive case centred on a galvanised shelf, three strap latches and a label recess

Latches, pins, corners and label come first; none disturbs the seal. A sound war reserve case gives a short hiss as the latches release; silence means the seal was lost, while heavy suction points to a blocked equalisation valve. The gasket is read for a continuous contact line, glazing and fold cracks. The inner wall closes the sequence, read for watermarks and base bow.

5. Linking opening and re-sealing

Opening is the first record of the next term, not sealing in reverse. Every part taken off needs a destination before the lid closes again: replaced, retained or scrapped. Left undecided, it is refitted by habit.

Release the centre latch first and the outer two after, so rim stress leaves gradually. A war reserve case left open past seventy-two hours has equalised with the room and is sealed as new, with a fresh gasket, charge and baseline. The recurring errors are refitting a compressed gasket and dating the new interval from the opening, not the re-sealing.

Conclusion

Sequence keeps a stored case sound: four checks, opposing latches, three records, a graded interval, five steps, and a new baseline inside seventy-two hours. Desiccant gain and gasket set carry the evidence.

This article covers container-side specifications and design implications only.