Is a larger explosive storage case safer?

Answer: No. More weight and bulk shorten carrying time and cut what actually goes out. Size to the 1.2 margin.

Can the liner be fitted later?

Answer: Yes, but pockets must be recut from the real items. Measuring the outline and missing a protrusion is the usual failure.

Do two lock holes require two key holders?

Answer: Most procedures require it; the case only supplies two independent points.

Is an IP67 case more durable?

Answer: Not necessarily. It relies on a tighter seal and higher preload, so it opens harder and ages sooner.

Can small batches change colour and print?

Answer: Within limits. Three colours and two-colour print is the usual ceiling; beyond that, lead time grows.

Choosing an Explosive Storage Case: 5 Decision Rules

Quick answer: Fix five numbers before quoting: carry load per trip, piece count and shape, carry method, lock points, and the environment the case enters. Written into an enquiry, they make supplier answers comparable.

Start with the Carry Load per Trip
Compartments and Liner by Piece Count
Carry Method Drives the Hardware
Lock Points and Compliance Questions
Ingress Rating and Batch Size Together
FAQ

1. Start with the Carry Load per Trip

Carry load per trip is what leaves the store for one task, not the stock level; sizing by stock produces a case nobody wants to lift.

Three classes cover most work: 3 kg with a 300 x 210 x 130 mm cavity at 2.2 kg, 6 kg at 340 x 240 x 150 mm and 2.8 kg, 10 kg at 390 x 270 x 170 mm and 3.6 kg. Count the pieces, weigh one, add the two and apply a 1.2 margin. Grip strength falls about 30 percent after twenty minutes, and past 12 kg you need a box rather than a bigger case.

Class	Load	Cavity	Empty weight
Small	3 kg	300 x 210 x 130 mm	2.2 kg
Medium	6 kg	340 x 240 x 150 mm	2.8 kg
Large	10 kg	390 x 270 x 170 mm	3.6 kg

2. Compartments and Liner by Piece Count

Piece count decides the compartments of an explosive storage case: up to four pieces, one bay with a movable divider; six to nine, fixed compartments; ten and above, a tray liner that lifts out whole.

Explosive storage case: an off-white body open on a wooden bench, black gasket around the lid rim, five foam pockets cut inside, cables and cartons beside it

Measure the longest item for pocket length and the widest for width: length plus 1.5 mm, width plus 2 mm, with 6 mm pocket walls. EPE at 25 kilograms per cubic metre suits occasional use, EVA at roughly 30 percent more cost suits weekly opening, and XPE dents under heavy items. Start the liner at 25 mm and never skip the bottom layer.

3. Carry Method Drives the Hardware

One hand tops out at 8 kg, with a 500 N handle mount and a 28 mm grip that still works through a glove. Two shoulders move the load to anchor points on both sides, using 38 mm webbing and swivel buckles. A single shoulder carries about 60 percent on one side, so keep it under 6 kg.

Loaded centre of gravity should sit within 90 mm of the base; past 120 mm the case swings and hits the leg. Pack real items, then walk twenty metres, which settles more than a drawing.

4. Lock Points and Compliance Questions

Ask about locks at enquiry stage. Two independent 8 mm lock holes plus a 3 mm seal hole is the minimum, and one open lock must still leave the lid shut.

Explosive storage case: a beige body open on a pallet, screwdrivers and test leads in lid foam, instruments below, grey crates behind

Agree first that the case is packaging and does not replace a permit. Three questions go to the supplier: road or air, what marking the carrier requires, and what record of opening the user needs. Serial numbers are the quiet failure, since silk print wears off, stamping damages the dissipative layer, and laser marking on a reinforcing pad is the usual compromise.

5. Ingress Rating and Batch Size Together

For an explosive storage case, IP67 means one metre of water for 30 minutes, IP65 jets, IP54 dust and splashes. A case moving between a boot, a store and a tent is covered by IP65; only river crossings or open nights justify IP67.

Write -25 to 55 degrees Celsius into the agreement: polypropylene goes brittle at the low end, the seal ages at the high end.

Item	Common figure	Note
Ingress rating	IP65 or IP67	IP67 only for water crossings
Temperature	-25 to 55 degrees Celsius	Both ends in the agreement
Drop sampling	1.0 m, six faces	Loaded, one drop per face
Minimum order	200 units	Three colours, two-colour print

Two hundred units and 25 days is a normal range, and tooling spread over 3000 units means small batches cost more each. Build three first articles, run the drop and the opening cycle, then release the mould.

Conclusion

Choosing an explosive storage case is subtraction across five numbers: load class sets the size, pieces and shape set the liner, carry method sets hardware strength, lock points set the compliance interface, and ingress rating with batch size sets the cost. Fix them once and the specification is done in one round, which is why a well-chosen explosive storage case is mostly decided before the first quote.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.