Who should write the acceptance standard for a Deployable Hard Case?

Answer: The buyer writes items and verdicts, the maker methods and sampling, both sign. Supplier-only standards follow their process.

Does pressure testing need a vacuum pass too?

Answer: Not both. A 30 kPa hold for 60 s exposes the sealing face; vacuum only checks the gasket.

How is drop height chosen?

Answer: From the handling height: 1.2 m manual, 0.8 m mechanical, 1.5 m air freight.

What if sampling finds one latch that will not open?

Answer: One dead latch is a Class A defect and rejects the batch. Pull the pin lot records.

How long does a type test report stay valid?

Answer: Twelve months. A new cavity, a material change, a wall change above 5 percent or a site move voids it.

Deployable Hard Case Acceptance Standards: Items and Verdicts

Quick answer: Acceptance runs in four layers: appearance, pressure and drop, stacking and salt spray, then documents. Each layer needs an item, a limit, a method and a sample size, or nothing can be cited in a dispute.

Acceptance Items and Decision Logic for a Deployable Hard Case
Appearance, Dimensions and First-Article Splits
Pressure, Drop and Vibration Testing
Stacking, Salt Spray and Latch Life
Sampling Plans and Nonconformance Handling
FAQ

1. Acceptance Items and Decision Logic for a Deployable Hard Case

A standard turns usable into numbers two people can agree on. For a Deployable Hard Case the layers are appearance, performance, endurance and documents, each answering what is measured, how, and the pass line.

Write every clause as item, limit, method and sample size. Surfaces shall be smooth gives two verdicts; no wall point below 3.8 mm, sixteen points per case, two out of tolerance allowed gives one.

Class A is checked on every case: full latch closure. Class B is sampled for dimensions, wall and cosmetics. Class C is the yearly type test. A new cavity, a change of material, a wall change above 5 percent or a site move forces a full retest.

2. Appearance, Dimensions and First-Article Splits

Cosmetic clauses cannot stay adjectives. Not permitted: cracks, punctures, exposed inserts, short shots on the sealing face. Limited: sink marks no deeper than 0.3 mm and 10 mm long, two per face. Accepted: flow lines and a colour shift within 1.5.

Deployable Hard Case: a beige closed case against a dark gradient, two cam latches, folding handle beside a round valve

The dimension chain follows assembly: envelope tolerance plus or minus 2 mm, rim flatness within 1.0 mm, lid-to-body offset within 1.5 mm, and 1.5 to 2.5 mm per side in the stacking groove, or cold shrinkage jams them.

Wall thickness is read by ultrasonic gauge at five points on the base, two per side wall, three on the lid. First article: three cases; batch: eight for appearance, five for dimensions.

3. Pressure, Drop and Vibration Testing

Pressure comes first: charge to 30 kPa, hold 60 s, pass if decay stays within 0.3 kPa; vacuum mirrors it. Water immersion is for disputes.

Item	Condition	Verdict
Pressure	30 kPa held 60 s	Decay within 0.3 kPa
Drop	1.2 m, six faces, three edges, four corners	Latches shut, no through crack

A drop verdict describes the state after impact: offset within 2 mm, a latch that still opens with one hand, a gasket still in its groove. Thirteen impacts; a 5 mm dent is allowed if not whitened.

Vibration is a sine sweep from 10 to 500 Hz at 1.5 g, one octave per minute, thirty minutes per axis, pressure rechecked after.

4. Stacking, Salt Spray and Latch Life

Stacking models storage. Take five high: a laden case weighs 60 kg, so the bottom unit carries 240 kg at 40°C for 24 h, then unload, rest an hour and measure height loss. For a Deployable Hard Case the limit is 3 mm, with no dishing.

Deployable Hard Case: a white case seen from above at a corner, lid ribs running into corner caps, two latch arms hanging, one round valve

Salt spray targets metal: 5 percent sodium chloride at 35°C for 480 h. Corrosion on hinges, pins and inserts stays under 5 percent, with no effect on travel and no pitting.

Latch life is 5,000 cycles at ten per minute. Design force is 120 N, decay under 30 percent, so the floor is 84 N, with pin wear under 0.2 mm. Glass-filled bodies need 500 cycles at -20°C, where the failure is cracking.

5. Sampling Plans and Nonconformance Handling

Sampling is an adjusted counting plan at inspection level II, single sampling: AQL 2.5 for major defects, 4.0 for minor.

Batch	Sample	AQL 2.5	AQL 4.0
151 to 280	32	Accept 2, reject 3	Accept 3, reject 4
281 to 500	50	Accept 3, reject 4	Accept 5, reject 6
501 to 1200	80	Accept 5, reject 6	Accept 10, reject 11

One Class A defect rejects the batch outright. A failed type test stops shipment until the full set is repeated; rework is screened 100 percent.

Documents close the loop: packing list, per-case sheet, material grade and resin lot, mould number, report numbers, certificate. One trace code per case leads back to machine, shift, resin lot and inspector.

Conclusion

The value of a Deployable Hard Case standard is not clause count but whether each clause can be judged. Give every item a limit, a method and a sample size, then add the Class A rule and the retest triggers. The pass must be repeatable, and that is what a Deployable Hard Case standard is for.

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.