Attachment 0021 -- Revisions and Exceptions.docx

Attachment 0021

Revisions and Exceptions to SAE ARP 1967B

The below listed paragraphs are exceptions to SAE ARP 1976B as requested by the U.S. Army Tank Automotive Command (TACOM) and shall be included with the container development/design effort. The exceptions listed apply to the specific paragraph noted and do not flow down to the sub-paragraphs in each section.

3.1.2 – N/A. This paragraph is not applicable to this requirement.

3.3.1.3 – Replace paragraph with the following:

Vibration and Shock Isolation:

Metal Container: The container shall be designed so as to prevent damage to the item resulting from the tests of section 4. The shock isolation system shall have a transmissibility of no more than 5 to 1, and transmit no more than 15 G’s to the item during drop testing. If consistent with the shock requirements and other design considerations, the resonant frequency of the loaded suspended system in the major translational modes of vibration shall be above 7.0 Hz.

Plastic or Composite Container: The container shall be designed so as to prevent damage to the item resulting from the tests of section 4. The shock isolation system shall have a transmissibility of no more than 5 to 1, and transmit no more than 40 G’s to the item during drop testing. If consistent with the shock requirements and other design considerations, the resonant frequency of the loaded suspended system in the major translational modes of vibration shall be above 7.0 Hz.

3.3.1.3.1 – Replace paragraph with the following:

Elastomeric Isolators: If elastomeric isolators are used each isolator shall be marked with its date of manufacture. The date shall be visible when the mount is installed. Elastomeric isolators shall meet the requirements of A-A-52486. Elastomeric isolators shall not exceed 18 months old when first installed.

3.3.2 – The last sentence does not apply.

3.3.3.2.2 – Replace the first sentence with:

All sealing surfaces shall be such to ensure sealing under performance requirements of this specification at 20.68 kPa (3.0 psig) positive pressure.

3.3.3.2.3 – Replace paragraph with the following:

The time required to open the container, remove the item, reinstall the item and to close the container for shipment shall not exceed two man hours.

3.3.4.2 – N/A. This paragraph is not applicable to this requirement.

3.3.4.1 – Replace the first sentence with:

Lifting rings, eyes or lugs capable of withstanding the tests prescribed herein, without failure or visible permanent distortion, will be provided for lifting the container and cover individually with chains, hooks, or by a single overhead hook.

3.3.5.2- Replace paragraph with the following:

The container shall incorporate 30-40-50 percent relative humidity indicator conforming to AS26860. The inside of the container will be configured to provide free access of the enclosed air to the indicator. The indicator will be placed as far as practical away from the desiccant receptacle but on the same container face for convenient observation and replacement purposes.

3.3.5.3 – N/A. This paragraph is not applicable to this requirement.

3.3.5.4 – Replace the last sentence with the following:

Removal and replacement of the relief valve(s) in metal containers will be possible without removing the container cover.

3.3.5.5 – N/A. This paragraph is not applicable to this requirement.

3.3.5.6 – N/A. This paragraph is not applicable to this requirement.

3.3.5.9 – N/A. This paragraph is not applicable to this requirement.

3.7.2- Replace paragraph with the following:

Color: Unless otherwise specified (see Section 6) the interior and exterior of the containers shall be primed and painted.

3.7.3 - Replace paragraph with the following:

Chemical Agent Resistant Coating (CARC): When specified (see Section 6) containers requiring CARC shall be in accordance with MIL-C-53072. All steel surfaces, except threaded and other working surfaces, shall be finished IAW the requirements of TACOM drawing 12369003. In addition to the marking requirements of 3.9, “CARC” shall be marked in 25 mm (1 in) letters in an area as near as practicable to the nameplate. Topcoat conforming to the requirements of TACOM drawing 12369003 or TACOM drawing 12369001, as applicable, color black (37030 or 37083), shall be used for all marking.

3.7.4 – N/A. This paragraph is not applicable to this requirement.

3.8.2- Replace the last sentence with:

Metal Container: Shock loads transmitted to the item shall not exceed 15 G’s. To demonstrate this requirement, longitudinal, vertical and lateral accelerations shall be measured by accelerometers mounted as close as possible to the center of gravity of the item. Permanent recordings of the accelerometer readings shall be made on a device having a range from one to 100 cycles per second (CPS).

Plastic or Composite Container: Shock loads transmitted to the item shall not exceed 40 G’s. To demonstrate this requirement, longitudinal, vertical and lateral accelerations shall be measured by accelerometers mounted as close as possible to the center of gravity of the item. Permanent recordings of the accelerometer readings shall be made on a device having a range from one to 100 cycles per second (CPS).

3.9- Replace paragraph with the following:

Markings: When specified (see Section 6) for containers requiring CARC, markings shall be clearly visible using topcoat conforming to the requirements of TACOM drawing 12369003 or TACOM drawing 12369001, as applicable, color black (37030 or 37083). The following markings shall be applied to all containers at the locations and in the sizes indicated unless impractical, in which case markings may be reduced or increased in proportion to the size of the container.

3.9 a. – Replace paragraph with the following:

Adjacent to the container cover lifting rings, eyes or lugs in 45 to 51mm (1.0 inch) letters:

LIFT HERE

3.9 b. – Replace 45 to 51mm (1.75 to 2.0 inches) with (1.0 inch).

3.9 c. – Replace (1.0 inch) with (0.5 inch).

3.9 d. – Replace (1.0 inch) with (0.5 inch).

3.9 e. – Replace (1.0 inch) with (0.5 inch).

3.9 f. – Replace paragraph with the following:

At the loaded center of balance at fork lift entries, a vertical line 1.52 mm (6.0 in) long and 25 mm (1.0 in) wide with the marking adjacent in 25 (1.0 in) letters:

LOADED CENTER OF BALANCE

3.9 g. – N/A. This paragraph is not applicable to this requirement.

3.9 h. – Replace (In four places on the shell) with (In two places on the sides of the shell).

3.9 i. – N/A. This paragraph is not applicable to this requirement.

3.9 l. – Replace (1.0 inch) with (0.5 inch).

3.9 m. – N/A. This paragraph is not applicable to this requirement.

3.9 n. – N/A. This paragraph is not applicable to this requirement.

3.11 Replace paragraph with the following:

Each container will be accompanied by an installation instructions bonded to the outer wall of the container cover. The instruction will be waterproof. Instructions will include a step-by-step procedure for installing and removing the contained item, including units of desiccant required. Torque values and torque sequence for mounting and closure hardware will be shown on the installation instructions when applicable.

4.2.2 – N/A. This paragraph is not applicable to this requirement.

4.5.2.1 – Replace paragraph with the following:

The container will be examined for leakage when assembled, loaded with an actual item or appropriate mass simulator, and sealed in the same manner as it will be prepared for shipment, except that the relief valve will be blocked off. The container will be tested at 20.68 kPa (3.0 psig) pressure. The container will be pressurized and allowed to stabilize for at least 15 minutes before starting the test. The test will be conducted in an enclosed area with constant temperature, no drafts and no solar load. The pressure will show no more than 0.2 kPa (0.029 psig) change in 30 minutes. This test will be conducted before and after all other tests are completed.

4.5.2.2 – N/A. This paragraph is not applicable to this requirement.

4.5.2.3 – N/A. This paragraph is not applicable to this requirement.

4.5.3 – Replace paragraph with the following:

Drop Test: Each container will be subjected to the following drop tests at ambient temperatures.

4.5.3.1- Replace paragraph with the following:

Edgewise Drop Test:

Metal Container: The loaded container shall be supported at one end of its base on a wood sill nominally six inches high, placed perpendicular to the skids. The opposite end of the container shall be raised and allowed to fall freely from heights of 6, 12, 18, 24, 30 and 36 inches successively to a concrete or similarly hard surface. Two drops shall be made from the 36 inch height. This test shall be applied to the other end of the container. If the size of the container and the location of the center of gravity are such that drop tests cannot be made from all of the prescribed heights, the greatest attainable height shall be repeated for a total of six drops.

Plastic or Composite Container: The loaded container shall be tested in accordance with ASTM D4169, Distribution Cycle 18, Assurance Level I, Acceptance Criterion 3. The test will be conducted in accordance with ASTM D6179, Test Method A - Rotational Edge Drop Test. If the container and contents weight and balance are such that the container will tip over and the drop cannot be made from the prescribed height, the sill timber support height will be increased.

4.5.3.2- Replace paragraph with the following:

Cornerwise Drop Test:

Metal Container: The loaded container shall be supported at one corner of its base on a block nominally six inches high. A block nominally 12 inches high shall be placed under the other corner of the same end of the container. The opposite end of the container shall be raised and allowed to fall freely from heights of 6, 12, 18, 24, 30 and 36 inches successively (as measured from the lower of the two corners) to a concrete or similarly hard surface. Two drops shall be made from the 36 inch height. If the size of the container and the center of gravity are such that drop tests cannot be performed from all of the prescribed heights, the greatest attainable height shall be repeated for a total of six drops. This test shall be applied to diagonally opposite corners on each end of the container. If during the testing, the blocks shift more than six inches from the end of the skids, the blocks shall be repositioned at the ends of the skids.

Plastic or Composite Container: The loaded container shall be tested in accordance with ASTM D4169, Distribution Cycle 18, Assurance Level I, Acceptance Criterion 3. The test will be conducted in accordance with ASTM D6179, Test Method B - Rotational Corner Drop Test. If the container and contents weight and balance are such that the container will tip over and the drop cannot be made from the prescribed height, the 150 mm (6.0 inches) and 300 mm (12 inches) timber support height will be increased proportionally. The support height should not be raised so high as to cause the container to slide on the timbers when the drop end is raised.

4.5.3.3- N/A. This paragraph is not applicable to this requirement.

4.5.3.4 - Replace paragraph with the following:

Flatwise Drop Test:

Metal Container: The container shall be raised in its normal storage position and allowed to fall freely from heights of 6 and 12 inches to land flat on a concrete or similarly hard surface. Container, 5 cubic feet to 25 cubic feet exterior volume, shall be dropped four times at each height. Containers 25 to 50 cubic feet shall be dropped twice from each height. Containers over 50 cubic feet shall be dropped once from each height.

Plastic or Composite Container: The loaded container shall be tested in accordance with ASTM D4169, Distribution Cycle 18, Assurance Level I, Acceptance Criterion 3. The container in its shipping configuration will be subjected to a 450 mm (18 inch) free fall drop test. The container will be raised vertically from its normal storage position and then allowing it to fall freely on its base onto a rigid surface. The test will be conducted in accordance with ASTM D6179, Test Method D - Unsupported Free Fall Drop Test.

4.5.4- Replace paragraph with the following:

Tipover Test: One of the following tests, whichever is applicable, shall be applied.

Roll-Over Test:

Metal Container: This test applies to containers having a gross weight under 1,500 lbs. The container in normal storage position shall be rolled slowly sideways until it falls freely onto its side on a concrete or similarly hard surface. This procedure shall be repeated with a fall from one side to the top, from the top to the other side, and from the other side to the base. This test shall be applied to vertical cylindrical containers. In vertical cylindrical containers the component is mounted from one end with its longitudinal axis perpendicular to the base of the container.

Tip-Over Test:

Metal Container: This test applies to containers having a width less than ¼ of the height and large containers with a gross weight over 1,500 lbs. The container in normal storage position on a hard level surface shall be slowly tipped to the one side until it falls freely to the ground. The container shall then be slowly tipped until it is back in the normal storage position. This test shall then be repeated to the opposite side of the container.

Plastic or Composite Container: The loaded container shall be tested in accordance with ASTM D4169, Distribution Cycle 18, Assurance Level I, Acceptance Criterion 3. The test will be conducted in accordance with ASTM D6179, Test Method G – Tipover Test.

4.5.5 – Replace paragraph with the following:

Vibration Test:

Metal Container: This paragraph is not applicable to this requirement.

Plastic or Composite Container: The loaded container shall be tested in accordance with ASTM D4169, Distribution Cycle 18, Assurance Level I, Acceptance Criterion 3. The test will be conducted in accordance with ASTM D999, Test Method B – Single Container Resonance Test.

4.5.6 – Replace paragraph with the following:

Pendulum Impact Test:

Metal Container: The container shall be suspended as a pendulum from four chains or cables (two chains or cables shall be used for cylindrical containers with two hoisting devices). The chains or cables shall be of sufficient length to provide a minimum distance of 16 feet from bottom of the container to point of suspension. The impact bumper shall be stationary and vertically flat and may be faced with a minimum nominal two inch thickness hardwood impact surface. The bumper impact surface shall be at least six inches high. The suspended container shall clear the floor or ground surface by two or three inches while swinging. The ends of the skids shall be the point of impact. The suspended container shall be pulled back perpendicularly from the bumper until a height of 18 inches or more than the floor clearance is reached. This measurement shall be taken vertically between a measuring reference point on the container and the floor or ground. The container shall be released to swing freely in a perpendicular line to strike the bumper. One impact shall be made on each end of the container.

Lateral Impact Test:

Plastic or Composite Container: The loaded container shall be tested in accordance with ASTM D4169, Distribution Cycle 18, Assurance Level I, Acceptance Criterion 3. The test will be conducted in accordance with ASTM D880, Procedure B, 179, Test Method B - Incline Impact Test.

4.5.7.1- Replace paragraph with the following:

Superimposed Load Resistance: One of the following tests, whichever is the greater load, shall be applied for Metal Containers. Plastic or Composite Containers shall be tested in accordance with ASTM D4169, Distribution Cycle 18, Assurance Level 3. The stacking test, which results in the highest computed load value, will apply. The test will be conducted in accordance with ASTM D4577, with the optional use of free weights instead of a testing machine. Containers will be subjected to the load for 1 hour.

Concentrated Load Resistance: A simulated load equal to twice the weight of the container with its designated contents shall be stacked on top of the container. If the stacked height of three containers does not equal 16 feet, add additional weight until it stimulates containers stacked to a minimum height of 16 feet. Containers shall not be pressurized during this test. Measurements shall be taken to determine if permanent deformation has taken place. Containers will be subjected to the load for 1 hour.

Distributed Load Resistance: A load of 175 pounds per square feet shall be evenly distributed on the top surface of the container. This test shall not be applied to areas with curved or dome shaped cross-section. Containers shall not be pressurized during this test. Measurements shall be taken to determine if permanent deformation has taken place. Containers will be subjected to the load for 1 hour.

4.5.8.1 – Replace paragraph with the following:

Hoisting Test: The loaded container shall be suspended for at least two minutes clear of the ground (or other supports) by one of the hoisting provisions. The hoisting provision shall be capable of withstanding this test without failure or visible permanent deformation. This test shall be applied separately to each individual hoisting handle, eye, ring, lug or bracket. Stationary hoisting devices shall not be positioned to extend beyond the maximum dimensions of the container. The same requirement applies to retractable hoisting devices when not in use.

4.5.8.3.2. – N/A. This paragraph is not applicable to this requirement.

12/29/2021