SOW_SSDGExhstPpngClnInsp_418.docx

25902_0316_FLT

REC_25902_FLT_«REC»

Ship Service Diesel Generator, Exhaust Piping, Commercial Clean

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to clean exhaust piping of Ship Service Diesel Generator (SSDG) sets listed in Table 1, including the associated stack uptakes.

TABLE 1– Ship Service Diesel GeneratoRs

1.2 Government-furnished property.

None.

2. REFERENCES

Coast Guard Drawings Coast Guard Drawing 750-WMSL-259-003, Rev G, Main Prop Dsl / Ss Dsl Gen Air Intake / Exhaust Diagram (ASC259002) Coast Guard Drawing 750-WMSL-259-004, Rev -, Main Prop Dsl / Ss Dsl Gen Air Intake / Exhaust System Description (ASC259002-02) Coast Guard Drawing 750-WMSL-259-011, Rev D, Main Engine Combustion Air Intake & Exhaust Arr, Dets & L/M Below 2nd Deck (ASC259009) Coast Guard Drawing 750-WMSL-259-013, Rev B, Main Engine Combustion Air Intake & Exhaust Arr, Dets & L/M 2nd Deck Up - 02 Lvl (ASC259011) Coast Guard Drawing 750-WMSL-259-014, Rev C, Main Engine Combustion Air Intake & Exhaust Supports, Dets & L/M 2nd Deck Up - 02 Lvl (ASC259012) Coast Guard Drawing 750-WMSL-259-019, Rev G, Incin & Dg Intake & Combustion Exhaust Arr, Dets & L/M, 2nd Dk - 02 Lvl (ASC259017) Coast Guard Drawing 750-WMSL-259-020, Rev D, Incin & Dg Intake & Combustion Exhaust Sup, Dets & L/M 2nd Deck - 02 Lvl (ASC259018) Coast Guard Publications Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2022, Requirements for Preservation of Ship Structures Surface Forces Logistics Center Standard Specification 8636 (SFLC Std Spec 8636), 2022, Temporary Hull Accesses Other References Code of Federal Regulations (CFR) Title 29, Part 1915, 2014, Occupational Safety and Health Standards for Shipyard Employment

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.

3.1.4 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 following:

· Access covers

· Exhaust stack

· SSDG

· Vent ducting

· Wiring

· Exhaust pipe expansion joints

· Exhaust insulation blankets

3.2 Staging or scaffolding. The Contractor shall erect suitable staging or scaffolding in accordance with 29 CFR 1915, Subpart E (Scaffolds, Ladders and Other Working Surfaces) to facilitate work, as required.

3.3 Safety precaution. The Contractor shall rig suitable safety netting, to protect workers during possible falls, and to protect the Engine Room and machinery from falling tools.

3.3.1 Temporary safety railing. To promote safety, the Contractor shall limit existing safety railing removals to an area where new safety railing can be installed during the same workday. During periods when not actively working on new safety railing, secure any gaps between existing safety railing with a substantial temporary lifeline arrangement similar to that currently installed on the vessel. Remove and dispose of all temporary lifelines upon completion of work.

3.4 Work plan. The Contractor shall develop and submit a plan for collecting and disposing of waste extracted during cleaning process. Ensure that the proposed plan shall detail how and where exhaust piping will be disconnected, how entire length of exhaust piping will be divided/sectioned for cleaning, and precautions to protect the SSDGs. One SSDG must remain operational at all times. The Contractor shall perform this work upon receiving Coast Guard approval of the plan. The work plan should be submitted with the proposal / bid.

3.4.1 Due to limited access to work areas, the Contractor may, with express permission of the KO (via submission of a CFR), cut access holes to facilitate accomplishment of the work specified herein. Perform all work required to open and close the access openings in accordance with SFLC Std Spec 8636.

note Coast Guard personnel will operate all shipboard machinery and equipment.

3.5 Operational test, initial. Prior to commencement of work, the Contractor shall witness Coast Guard personnel perform an initial operational test of the exhaust piping system, to demonstrate existing operational condition. Submit a CFR.

3.6 Cleaning. The Contractor shall clean the interior surfaces of the exhaust piping and stack uptakes to the SSDGs, shown on Coast Guard Drawing(s) 750-WMSL-259-003,750-WMSL-259-004, 750-WMSL-259-011, 750-WMSL-259-013, 750-WMSL-259-014, 750-WMSL-259-019, and 750-WMSL-259-020 to a condition free from soot, tar, and any other foreign matter as follows:

3.6.1 Disconnect the exhaust piping as necessary to facilitate cleaning.

3.6.2 Thoroughly sweep, mechanically clean, and vacuum the interior of each exhaust pipe system, including the mufflers, from the exhaust outlet to the topmost location outside the vessel. Clean all adjacent stack uptake surfaces. Ensure that all tar deposits, soot deposits, and all other surface contaminants are completely removed.

3.6.3 Remove all debris from the pipe surfaces, stack deck, and Engine Room areas by vacuuming. Dispose of all cleaning materials and generated debris in accordance with all applicable Federal, state, and local regulations.

3.6.4 Reassemble exhaust piping; renew all disturbed flange connection gaskets with suitable high temperature, non-asbestos-containing gasket materials. Gasket material for flanges shall be Flexitallic thermiculite , CRES 316 Core, Max Service Temp 1450 deg F, Flexitallic or equal, 1/8” thick gasket (Item # 58, 750-WMSL-259-019). Renew all flange nuts and bolts. Renew all disturbed fasteners.

3.7 Inspection and report. The Contractor shall perform a visual inspection of the following components; submit a CFR with photographic/video evidence of cleanliness:

· Exhaust stack access hatches, including all associated studs and nuts.

· All cleaned exhaust stack surfaces.

· All exhaust expansion joints, including associated bolts.

3.7.1 Following cleaning of the interior of each exhaust pipe system, the Contractor shall demonstrate completeness of the cleaning process to the Coast Guard Inspector, showing that the entire length of exhaust piping has been satisfactorily cleaned according to the work plan.

3.8 Touch-up preservation. The Contractor shall prepare and coat all new and disturbed surfaces to match existing adjacent surfaces in accordance with SFLC Std Spec 6310, paragraph 3.1.13 (Touch-ups and minor coating repairs).

NOTE

Coast Guard personnel will operate all shipboard machinery and equipment.

3.9 Operational test, post repairs. After completion of work, the Contractor shall thoroughly test, in the presence of the Coast Guard Inspector and demonstrate the SSDG exhaust piping system to be in satisfactory operating condition. Submit a CFR.

4.0 Location / POC.

USCGC BERTHOLF

1 Eagle Rd.

Alameda, CA 94501 POC: MKCM Armando Perez

(510) 418-2223

4. NOTES

This section is not applicable to this work item.

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