ANT Colfax SOW for Stbd MDE Keel Cooler.pdf

Scope of Work for USCG ANT Colfax 643503

Starboard Engine Grid Cooler RW Fernstrum & CO

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to Haul out the Vessel 643503, clean, inspect, repair and hydrostatically test the following grid coolers (Refer to Para 4.1 “Term applicability”):

SERVICE QTY LOCATION

MDE 1 15 – 22 starboard

PRINCIPAL CHARACTERISTICS

64’ ANB

PHYSICAL

Length overall 63’ 8” Depth (main deck at side to baseline)

4’ 0”

Maximum beam 24’ Height of highest projection (above DWL)

23’6”

Weight of Vessel 165 US Tons

Full load displacement 120 LT Frame spacing 24” Full load draft 4’ 0”

HULL

Hull material

MACHINERY

Number of propellers 2 Number of blades per propeller 5 Diameter of propeller 36” Pitch 32”

RPM N/A

Shaft diameter N/A

TANKS

1.2 Government-furnished property.

None.

**New or refurbished equipment that the Government may provide for installation in place of existing equipment.

***Government-furnished property, which is to be supplied by either the vessel or the C4IT Service Center.

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 64 ANB 256-001, Rev -, Engine and Shaft Cooling System Coast Guard Drawing 64 ANB 85_3_1, Rev- , Docking Plan

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2014, General Requirements Surface Forces Logistics Center Standard Specification 5000 (SFLC Std Spec 5000), 2014, Auxiliary Machine Systems

OTHER REFERENCES

Commercial Item Description (CID) A-A-52624, Nov 2008, Antifreeze, Multi Engine

Type, Ethylene Glycol (For Caterpillar equipment applications, use CAT Extended Life Pre-Mix coolant.)

Fernstrum Gridcooler Installation and Maintenance Manual, 2013, Form 175

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None.

3.1.2 Tech Rep

Not applicable.

3.1.3 Protective measures. The Contractor shall furnish and install all protective coverings to seal off and protect all non-affected vessel's components, equipment, and spaces near the work area against contamination during the performance of work. Upon completion of work, the Contractor shall remove all installed protective measures, inspect for the presence of contamination, and return all contaminated equipment, components, and spaces to original condition of cleanliness.

3.1.3.1 Install blanks on the open ends of piping to prevent any contamination or foreign debris from entering the affected systems. Ensure that all cleaning equipment or media used in the cleaning process do not cause any damage to cooler components.

3.1.4 Interferences. The Contractor shall handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences). Known interferences include, but are not limited to the below-listed:

• Piping

3.2 Environmental compliance. The Contractor shall dispose of all waste fluids in accordance with all Federal, state and local regulations.

3.3 Cleaning, inspection, and testing (hydro) requirements. The Contractor shall accomplish the following for each designated cooler (see Paragraph 1.1 - Intent), as shown on Coast Guard Drawing 64 ANB 256- 001:

3.3.1 Preparation. Prepare as follows:

• Drain and dispose of all existing cooler fluids.

• Disconnect and remove the cooler to a suitable repair shop.

3.3.2 Inspection. Perform a visual inspection of all surfaces/components for deterioration or other defects.

Visually inspect suction and discharge piping. Submit a CFR that includes the following information:

• Visual inspection results

• Make & model of cooler (manufacturer name, model number, part number, serial number as applicable) based upon existing label plates and/or engraving

• Last known test data (test pressure, test date, testing facility) as indicated by affixed data plate (indicate “Unknown” if data plate is missing or illegible)

3.3.3 Cleaning. Clean all cooler interior and exterior surfaces free of all debris or contaminants using industrial standard methods and in accordance with manufacturer’s recommendations. Refer to Fernstrum Gridcooler Form 175. .

3.3.4 Pressure test (hydro). Pressure test each cooler in the presence of the COR in accordance with paragraph C2.7 (Heat exchangers and fluid coolers) of SFLC Std Spec 5000. Be aware that no leakage or permanent deformation of pressure-containing parts is permissible. Repair all leaks and discrepancies found. Submit a CFR.

CAUTION

Extreme precaution must be taken to not exceed manufacturer’s recommended test pressure during hydrostatic testing.

3.4 Reassembly. After cleaning and any authorized repairs are complete, the Contractor shall reassemble the cooler. Renew the following components, as applicable, in accordance with cooler manufacturer’s recommendations:

• Fasteners (shall be stainless steel).

• Threaded fittings.

• O-rings and seals.

• Hoses between cooler and piping systems, and associated hose clamps.

• Thermostats.

3.5 Reinstallation. After completion of testing and all authorized repairs, the Contractor shall reinstall the cooler. Where applicable, renew (as necessary) all plates, gaskets, grid-cell bars and recessed hex-head bolts in accordance with the manufacturer's specifications. Apply a copper-based anti-seize compound on all bolts; and torque in accordance with manufacturer’s specifications.

3.6 System replenishing. The Contractor shall completely fill the cooling water system with a 50/50 mixture of distilled water and ethylene glycol antifreeze, conforming to CID A-A-52624.

3.7 Clean. The Contractor shall ensure that all cleaned surfaces are one hundred percent free of debris and surface contaminants.

3.8 Label plates. The Contractor shall attach an anodized aluminum test data plate to each cooler using epoxy resin cement. Ensure that each plate is engraved with ¼-inch high letters, stating the following:

• Test pressure.

• Test date.

• Testing facility.

3.9 Leak test. After reconnecting the cooler(s) on the vessel (and prior to undocking), the Contractor shall perform an operational test of the cooler and associated system piping using the system fluid at normal operating pressure. Be aware that no visible leakage or deformation is acceptable. Repair all leaks and discrepancies found. Submit a CFR.

3.10 Reinstallation of Vessel. After all repairs and tests have been made and tested satisfactory to manufacturer’s specification and USCG Contractor approval, the boat will be placed back in the water.

USCG crew will then take ownership of vessel.

4. NOTES

4.1 Term applicability. The term grid cooler is applicable to grid coolers and keel coolers.

4.2 Grid cooler manufacturer:

RW Fernstrum & CO

(906) 863-5553

4.2.1 MDE cooler part number: D8168U.

4.3 Cooling system capacity. Cooling system approximate gallon-capacity is as follows:

4.3.1 MDE: 13 gallons.

4.4 *Warranty* All work herein shall be warrantied IAW shipyard general policy and terms of agreement or if replacement was necessary IAW manufacturers warranty.

21JAN2020

Principal Characteristics