Commanding Officer, Engineering Field Activity, Chesapeake, 901 M Street, SE, Bldg 212, Washington Navy Yard, Washington, DC 20374-5018

66 -- DENITRATION/ACID MIX FACILITY, NAVAL SURFACE WARFARE CENTER, INDIAN HEAD DIVISION, INDIAN HEAD, MARYLAND SOL N62477-95-R-0028 DUE 081396 POC Sandra K. Soderstrom, Contracting Officer (202) 685-3160 The Engineering Field Activity Chesapeake intends to construct a new Denitration/Mix and Acid Storage Facility at the Indian Head Division, Naval Surface Warfare Center, Indian Head Maryland. Construction proposal documents require identification of an Acid Stabilization and Nitric Acid Concentration (ASC/NAC) system which is designed to decompose the residual nitrate esters and concentrate the nitric acid. The system must consist of a packed distillation column with direct steam injection followed by pre-bleach column and bleaching column (as opposed to a conventional tray column). The system must have the required condensers. Due to the corrosive nature of the required hot nitric acid, a liner is required to protect the column skin from the acid. The NAC System will separate the nitric acid from the sulfuric acid and produce 98% nitric acid. Therefore, the ASC/NAC system requires a NOx absorber. Construction proposal documents will further require identification of a Sulfuric Acid Concentration (SAC) System which utilizes two stage horizontal boilers instead of three stages to achieve the required 93% sulfuric acid concentration. The equipment must have glass lining to handle the high vacuum needed to boil sulfuric acid at lower temperature. The hoizontal boilers shall have tantalum tubes while the economizers and acid coolers shall have silicon carbide tubes. The process will use indirect heating by hot oil in the horizontal boilers. The SAC system will have the vacuum systems on both Stage I and Stage II condensers. Illustration of the Facility design for Process Flow may be requested. Interested sources proposing to supply equivalent system must meet the following qualifications: (a) The system should have a minimum of 50% American made components; (b) the equipment that is PTFE lined should have paste extruded PTFE with low permeability (permeability data should be submitted); (c) PTFE liner should be minimum 5.5 mm thick. Written qualification statements clearly establishing the capability to meet the above requirements must be submitted within 15 days from the date this notice is published. In the absence of other qualifying sources, it is the intent of the Agency to identify QVF of Corning, New York as the name brand product within the construction proposal documents as no other type of equipment will satisfy the agency minimum requirements. (0211)

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