Attach_0010_MK2_Mod_0_Acceptance_Criteria_31Jan2018.pdf
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- Solicitation number
- W31P4Q-17-R-0046
About this file
This document contains acceptance criteria for reusable pallet crates used to transport Mk 90 Mod 0 Propellant Grains. The pallet crates must meet thirteen structural integrity and functional performance requirements related to the lid catches, welds, deck levelness, ability to contain grain containers, lack of deformations preventing packing of containers, support feet, transportation via forklift, maximum allowable broken welds, corner support welds, rust, gaps allowing container exit, and severely deformed bars. Non-conforming pallet crates must be repaired or refurbished to meet these criteria in order to be reused for transporting the propellant grains.
A second document provides details about a forthcoming solicitation for the Hydra-70 Rocket System production and engineering services contract. The contract will have firm-fixed-price and cost-reimbursable elements over five years with a single award to a National Technology and Industrial Base member. The Hydra-70 Rocket System is a 2.75-inch family of unguided rockets used by various U.S. and foreign military aircraft for close air support, anti-materiel, anti-personnel, and suppression missions. The acquisition will procure Hydra-70 rockets, warheads, containers, and associated components as well as engineering services to maintain system capabilities.
Attachment 0010 MK2 Mod 0 Acceptance Criteria
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W31P4Q-19-X-XXX
Attachment #0010
31 January 2018
MK90 Grain Propellant Grain Cage Inspection Criteria
Mk 2 Mod 0 Pallet Crate Acceptance Criteria
I. Background
The Mk 2 Mod 0 Pallet Crate is a reusable palletainer designed to provide safe domestic and overseas transport of the Mk 90 Mod 0 Propellant Grain. As a reusable packing item, the pallet crate is subject to damage (e.g., broken welds, broken or bent wires, and dents) and deterioration (e.g., corrosion) throughout its service life. The subsequent paragraph defines the acceptance criteria for reuse of the pallet crate in transporting the Mk 90 Mod 0 Propellant Grain.
II. Functional Performance & Structural Integrity Requirements The pallet crate shall be repaired or refurbished to the extent necessary to meet the following functional performance and structural integrity requirements.
1. The pallet crate lid shall have a minimum of three (3) functioning catches and these catches shall not all occur on the same side. Note that this minimum quantity and location of functioning catches are sufficient to securely fasten the top, thereby ensuring safety while stacking pallet crates on top of each other. Additionally, the catches are intended solely to fasten the top and are not considered to provide significant structural support.
2. Pallet crate lid cross-members anchoring catches shall not exceed two (2) broken welds per side. Note that a failure of two (2) welds out of ten (10) welds yields approximately 80% of its original structural integrity.
3. Pallet crate sidewall cross-members interfacing with catches shall not exceed two (2) broken welds per side. Note that a failure of two
(2) welds out of 12 welds yields approximately 83% of its original structural integrity.
4. The pallet crate deck shall be level within 0.75 inches when measured using a straight edge across the deck.
5. Pallet crate cross-members shall not contain any broken cross-members that could puncture a Mk 682 Mod 0 Grain Container and damage a propellant grain within its interior confines or within the interior confines of any adjacent pallet crate(s) under normal transportation conditions.
6. Pallet crate cross-members shall contain no deformations (e.g., bends or dents) that prevent the packing of 186 Mk 682 Mod 0 Grain Containers in accordance with MIL-STD-1322/53. Note that bends and dents of pallet crate cross-members that impact the quantity of packed grain containers detrimentally affect the form, fit, and function of the palletainer.
7. The pallet crate support feet shall hold the palletainer level within .075 inches when measured using a straight edge across the deck.
The pallet crate is permitted one (1) missing support foot per side, but shall not exceed a total quantity of two (2) missing support feet per pallet crate. Note that a pallet crate missing a quantity of support feet in excess of these limits may pose a safety hazard by permitting the pallet crate to tip over.
8. The pallet crate shall not contain any damage that prevents transportation with a forklift.
9. Pallet crate short sides (41-3/8 inches) shall not exceed 138 broken welds per side and pallet crate long sides (48 inches) shall not exceed 184 broken welds per side. Note that a pallet crate has 23 horizontal wires (hw) with 12 vertical wires (vw) on each short side and 16 vertical wires (vw) on each long side. Consequently, there are 276 welds on each short side (23 hw x 12 vw) and 368 welds on each long side (23 hw x 16 vw). The maximum number of allowable broken welds per side yields approximately 50% of its original structural integrity.
10. As a further restriction to the broken weld requirements defined in paragraph 9 above, pallet crate sidewall connections to a corner support shall not exceed 11 broken welds at each of the eight (8) sets of such connections. Note that a failure of 11 welds out of 23 welds yields approximately 52% of its original structural integrity.
11. The pallet crate shall be free of heavy rust scales. The method(s) used to remove such corrosion accumulations shall not detrimentally affect the usability of the palletainer.
12. The pallet crate shall not contain any gaps of sufficient size to permit a Mk 682 Mod 0 Grain Container to exit the palletainer.
13. The pallet crate shall be free of severely deformed bars that are capable of moving freely. Note that this condition may pose a physical safety hazard to personnel.
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