DIRECTORATE OF CONTRACTING, USAAPGSA, RYAN BLDG, APG MD 21005-5001

E -- FABRICATE AND ASSEMBLE A PRESSURE VESSEL AND FRAGMENTATION SHIELD FOR THE FIRE SAFETY TEST ENCLOSURE SOL DAAD05-95-R-0836 DUE 060695 POC Contract Specialist John M. Robb (410) 278-2024 (Site Code DAAD05) The U.S. Army Combat Systems Test Activity (CSTA) has a requirement to fabricate and assemble, IAW Government drawings and specifications, a Pressure Vessel and Fragmentation Shield for the Fire Safety Test Enclosure (FSTE) at Aberdeen Proving Ground, MD. The Pressure Containment Vessel shall consist of an 84 ft. diameter 20 ft. high cylinder (1 in. to 2 in. thick steel) with an 84 ft. diameter hemisphere (1 in. thick) attached to the cylinder. This vessel shall attach to a supporting 4 ft. thick concrete support slab to be assembled under a separate contract. Variable speed air system supply with up to a 16,000 CFM capability shall provide incoming feed air, which will be heated to 50 degrees Fahrenheit in winter and provide dilution air in winter for drying the fixture. This shall be powered by a fan. The pressure containment vessel, and fragmentation shield is designed to contain all the test effluent released during test scenarios: (a) A high-explosive blast equivalent to 100 lb. TNT detonated in the center of the containment vessel within + or -2 ft. and approximately 12 ft. from the center of the floor surface. (b) Test Scenario (a) combined with the burning of 650 lb. of JA-2 propellant. (c) Test Scenario (a) combined with the burning of a maximum of 250 lbs. of diesel fuel and 500 lbs. of JA-2 proponent. Maximum fuel consumption is expected to be 200 lb/min for a 15-minute duration. Maximum Halon 1301 discharge is 1,000 lbs. (d) Test with a high-explosive blast no greater than the equivalent of 10 lb TNT. (e) Test Scenario (a) combined with the burning of a maximum of 500 gallons of diesel fuel. (f) Test Scenario D combined with the burning of a maximum of 250 gallons of diesel fuel and 500 lbs of JA-2 propellant. The vessel shall prevent the direct release of the test effluent to the atmosphere. Fresh air shall be provided at the bottom of the vessel and air shall be exhausted from the top of the vessel. The air-handling system shall be able to completely ventilate the interior of the containment vessel and provide sufficient air to sustain combustion as described in the test scenarios above. The pressure vessel shall interface with the Emission Control System (ECS), to be assembled under a separate contract, through insulated duct work which will lead from the top of the vessel. The gaseous test effluent will be drawn off the top of the hemisphere and fed to the ECS through the duct work. The vessel shall be pinned to a 4 ft. thick concrete support slab. The fragmentation shield shall be an octagonal structure consisting of 4 in. thick steel walls, sloped wall, and roof section. The octagon is 57 ft. across the flats, and 62 ft. across the points, and is 52 ft. high. The vertical side sections are 32 ft., above which is a section 20 ft. high sloping inward at 60 degrees (total height 52 ft.). The fragmentation shield shall have perforations to allow dissipation of the blast over-pressure. The perforation shall have covers to prevent explosively generated fragments from perforating the pressure vessel. The fragmentation shield shall promote flow of the air out of the top of the vessel and shall be at least 3 ft. from the pressure vessel at all points. The fragmentation shield shall interface with a plenum at the top of the containment vessel which shall carry the exhaust air to the ECS. The top of the shield attached by pins to allow it to rise under pressure. The bottom of the shield shall likewise be pinned to an environmental pad consisting of a 3 in. thick steel floor section completely underneath the fragmentation shield. This environmental pad shall contain a drainage system to allow for drainage of fire suppression fluids from the interior of the facility to the exterior for recycling. The environmental pad shall be embedded in a second concrete slab (2 ft. thick) which is above and structurally attached the 4 ft. concrete support slab. (The concrete slabs are not part of this procurement). All responsible sources may submit an offer which shall be considered by this agency. No telephone requests, only written or facsimile requests (410-278-7447) will be honored.(0107)

Loren Data Corp. http://www.ld.com (SYN# 0034 19950418\E-0002.SOL)