RFP_QandA_No._5_BRASHEAR_16-R-4313.docx

MILITARY SEALIFT COMMAND

N32205-16-R-4313

USNS CARL BRASHEAR ROH/DD

QUESTIONS AND ANSWERS #5

The following are answers to questions received from potential offerors. The answers provide clarification only and do not constitute an amendment to the solicitation.

SPECIFICATION ITEM NO.: ____MULTIPLE_________________

PARAGRAPH / SECTION NO:__N/A_________________

TITLE: _ Multiple Work Items Requiring ship Inspection QUESTION: Items that require a ship inspection on the USNS CARL BRASHEAR (T-AKE 7) Items of Importance : 0117 - Steel Renewal and Preservation Frames 62 thur 65 (VR16-0020) Reason – To perform an inspection of actual damage, location, interferences, an chill water piping ANSWER: Interior Interferences for Steel Renewal. See photos that follow to show interferences in way of repair for WI 117

Interior of Cargo Hold #3, 4th deck refrigeration space. Stainless Steel Flashing, insulated.

Refrigeration Space, floor deck grating, tub and skirt interferences Interior Interferences, ceiling grating and appendages Interior interferences, hardware for grating, lower grating, aluminum, and tub/skirt

0514 - PROCURE AND REPLACE FIREPUMP SUCTION VALVES

Reason – Check for interferences, if piping needs modification and if staging is required

ANSWER: Interferences for fire pump suction valves, mainly Catwalk. Staging not required unless for rigging tackle. See photos that follow that show the interferences for WI 514.

Catwalk, grating and handrails in way of firepump valves, above tanktop.

Catwalk, grating and handrails in way of firepump valves, above tanktop.

0516 - PROCURE AND REPLACE HT ISOLATION VALVES (VR16-0029)

Reason – Check for interferences, if piping needs modification and if staging is required ANSWER: WI 0516 does not require heavy staging, valves are accessible via catwalk or ladders, planks may be necessary, valves are stationed on upper catwalk of Main Engine space.

0517 - PROCURE AND REPLACE HTCW ISOLATION VALVES AND FAN COIL INSPECTION (VR16-0030)

ANSWER: WI 0517 HTCW Isolation Valves and Fan Coil Inspection. Will require staging or ladders to get to upper valves/upper fan coil. See photos that follow that are visuals of corrosion on some valves and amount of insulation/lagging. Fan Coils covered in Blue Filter media.

0519 - BOW THRUSTER COOLING REGULATOR (T-ALT 227)

ANSWER: WI 0519 will require staging at motor.

Valves at lower level Bow Thruster leading to upper deck frequency converter.

Supply and return to Bow Thruster Motor frequency converter.

Piping from motor to upper deck frequency converter.

Piping from motor to upper deck frequency converter.

Piping leading from Motor to behind frequency Converter

Temp Control Valve and bypass header behind frequency converter

Interior of frequency converter, temp control valve 0520 - VCHT Check Valve Installation (T-ALT 362

ANSWER: WI 0520 VCHT Valve Install will require staging to get to upper valves of VCHT system. See photos that follow that show visuals for WI 520

VCHT Piping from Eductor to pumps

Eductors, location of Check Valve Installations VCHT Eductors

VCHT Pumps

VCHT Manifold and check valve installation location

0521 - MSD VCHT TANK AND PIPING REPAIRS (VR16-0014)

Reason – To perform an inspection of actual damage of MSD tank, location, interferences, and piping that will be renewed ANSWER: Photos of MSD Contact Tank Effluent Sample Valve, Tank Damage, and Workspace/Interferences. WI 0521

Existing Effluent Sample Valve

MSD Contact Tank Wastage

MSD Contact Tank Stud Wastage

MSD Contact Tank Stud Wastage

MSD Contract Tank view from Top, and Interferences, Catwalk, Handrail, piping.

MSD Contract Tank view from Top, and Interferences, Catwalk, Handrail, piping.

Walkway outboard of contact tank, interferences, pumps, piping, structure

Walkway outboard of contact tank, interferences, pumps, piping, structure

0522 - SW Pump Suction Valves and LTFW Cooler Bypass Repairs (VR16-0002-4)

ANSWER: WI 0522 will require temporary removal of Catwalk, Grating, at each Pump Station to remove Valves. Staging will be required for repair/replacement of LTFW Cooler Bypass Valve and piping repair. 1 and 2 Suction Valves are mounted beneath the chloropac unit skid. The valves can be removed without cutting out skid but hand rails, deck grating and catwalk step down ladder should be removed. Also the 1.5” saltwater supply line to the chloropac unit will need to be removed. Any other object in the way that can be broken should be removed. Rigging should be done with beam clamps and straps working around 24” lines in the overhead.

#3 SW valve is much more in the open and rigging is similar but easier to rig. See photos that follow that show the interferences for WI 522.

SW Valve #1 Suction, proximity to Low Suction Strainer Isolation and Chloropac Unit above, ladder and Catwalk in proximity.

SW Valve #2 Suction and operator, Catwalk and Chloropac unit and foundation above valve.

SW Valve #3 Suction and operator.

0903 - PROPELLER SHAFT AND STERN TUBE INSPECTION

Reason – Confirm if Pad Eyes are in Shaft Alley ANSWER: 0903 – Yes Pad Eyes are still in place in Shaft Alley for work.

SPECIFICATION ITEM NO.: 509

QUESTION: In section 2.0 References list 2.3 Standard Item 49. Standard item 49 states that the contractor shall grit blasted to bare metal the fan housing, then apply one (1) coat primer and one (1) finish coat to match surrounding areas for units located within the interior of the ship.

Reference 2.3 is not invoked in section 7.1.

Is the intent to overhaul just the motors and balance fans or remove fan casings from the ship per ref 2.3 which may require some temporary access cuts?

ANSWER: The intent is to overhaul the motors, balance fans, and preserve housing and adjacent fire damper where applicable, per 7.3.1.b. Access cuts may be required dependent on rigging capability and repair yard’s process for overhauling fan/motor and preserving housing/dampers.

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