4.1 This practice provides a guide for the evaluation of shipping units in accordance with a uniform system, using established test methods at levels representative of those occurring in actual distribution. The recommended test levels are based on available information on the shipping and handling environment, and current industry/government practice and experience (1-13).6 The tests should be performed sequentially on the same containers in the order given. For use as a performance test, this practice requires that the shipping unit tested remain unopened until the sequence of tests are completed. If used for other purposes, such as package development, it may be useful to open and inspect shipping units at various times throughout the sequence. This may, however, prohibit evaluating the influence of the container closure on container performance.

4.2 For Distribution Cycle 18, as referred to in MIL-STD-2073–1, the use of this practice is defined in subsequent sections identified as DC-18.

1. Scope

1.1 This practice provides a uniform basis of evaluating, in a laboratory, the ability of shipping units to withstand the distribution environment. This is accomplished by subjecting them to a test plan consisting of a sequence of anticipated hazard elements encountered in various distribution cycles. This practice is not intended to supplant material specifications or existing preshipment test procedures.

1.2 Consider the use of Practice D7386 for testing of packages for single parcel shipments.

1.3 The suitability of this practice for use with hazardous materials has not been determined.

1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Test Requirement 测试要求：

DC1 General－Undefined distrbution system  一般情况－未定义运输产品

1 handling 跌落测试
2 Stacked Vibration 堆码振动测试
3 Loose-Vibration 自由振动测试
4 Simulated Rail Switching 模拟铁轨切换测试
5 handling 跌落测试

DC3 Single package environment, up to 100lb(45.4kg)  小于等于100lb(45.4kg)的单个包装

1 handling 跌落测试
2 Vehicle Stacking 车载堆码测试
3 Loose-Vibration 自由振动测试
4 Vehicle vibration 车载振动测试
5 handling 跌落测试

DC4 Motor freight, single package over 100lb(45.4kg) 大于100lb(45.4kg)的单个包装－船运方式

1 handling 跌落测试
2 Vehicle Stacking 车载堆码测试
3 Loose-Vibration 自由振动测试
4 Vehicle vibration 车载振动测试
5 handling 跌落测试

DC5 Motor freight, TL, not unitized 整车不组合包装的船运

1 handling 跌落测试
2 Stacked Vibration 堆码振动测试
3 Vehicle vibration 车载振动测试
4 handling 跌落测试

DC6 Motor freight, TL, or LTL - unitized 组合包装的船运

1 handling 跌落测试
2 Stacked Vibration 堆码振动测试
3 handling 跌落测试
4 Warehouse Stacking 仓库堆码测试

DC7 Rail only, bulk loaded 散装货物的火车运输

1 handling 跌落测试
2 Stacked Vibration 堆码振动测试
3 Simulated Rail Switching 模拟铁轨切换
4 handling 跌落测试

DC8 Rail only, unitized 组合包装的火车运输

1 handling 跌落测试
2 Stacked Vibration 堆码振动测试
3 Simulated Rail Switching 模拟铁轨切换测试
4 handling 跌落测试
5 Warehouse Stacking 仓库堆码测试

DC9 Rail and motor freight, not unitized 不是组合包装的火车和货船运输

1 handling 跌落测试
2 Vehicle Stacking 车载堆码测试
3 Vehicle vibration 车载振动测试
4 Simulated Rail Switching 模拟铁轨切换测试
5 Loose-Vibration 自由振动测试
6 handling 跌落测试

DC10 Rail and motor freight, unitized 组合包装的火车和货船运输

1 handling 跌落测试
2 Vehicle vibration 车载振动测试
3 Simulated Rail Switching 模拟铁轨切换测试
4 handling 跌落测试
5 Warehouse Stacking 仓库堆码测试

DC11 Rail, TOFC and COFC 火车, 拖车及箱装箱运输

1 handling 跌落测试
2 Simulated Rail Switching 模拟铁轨切换测试
3 Stacked Vibration 堆码振动测试
4 Loose-Vibration 自由振动测试
5 handling 跌落测试

DC12 Air(intercity) and motor freight(local), over 100lb(45.5kg), unitized 在当地（城市间）通过空运和船运两种方式运输，重量大于100lb(45.4kg)的未组合包装  

1 handling 跌落测试
2 Stacked Vibration 堆码振动测试
3 Low Presure 低气压测试（可选）
4 Vehicle vibration 车载振动测试
5 handling 跌落测试

DC13 Air(intercity) and motor freight(local), single package up to 100lb(45.5kg) 在当地（城市间）通过空运和船运两种方式运输，重量小于等于100lb(45.4kg)的单体包装

1 handling 跌落测试
2 Vehicle Stacking 车载堆码测试
3 Loose-Vibration 自由振动测试
4 Low Pressure 低气压测试（可选）
5 Vehicle vibration 车载振动测试
6 handling 跌落测试

DC14 Warehousing(partial cycle to be added to other cycles as needed) 仓储测试（根据仓储条件增加相应的条件）

1 handling 跌落测试
2 Warehouse Stacking 仓库堆码测试

DC18 Non-Commercial Government shipments per MIL-STD-2073-1 非营利机构的运输测试（按照MIL-STD-2073-1）

1 handling 跌落测试
2 Stacking 堆码测试
3 handling 跌落测试
4 Environmental Hazard 气候模拟测试
5 Loose-Vibration 自由振动测试
6 handling 跌落测试

Sample Size 样品数量 / 送样规格:  1 Carton
Lead Time / TAT (Turn Around Time) 测试周期: 常规服务 Regular service 7 working days

Report Summary 报告摘要: