47296 SPEC.pdf

USCG 47296 (MLB 47)

USCG NATIONAL MOTOR LIFEBOAT SCHOOL (47296 MLB)

SPECIFICATION FOR DRYDOCK REPAIRS

FY2023

Developed By: Lauren M Hughes

(Rev-0, 15 February 2023)

USCG 47296 (MLB-47) DRYDOCK AVAILABILITY FY2023

ii (Rev-0)

TABLE OF CONTENTS

Revisions Record .......................................................................................................................................... iv Consolidated List of References .................................................................................................................... v Consolidated List of Government-furnished Property ................................................................................. ix Consolidated List of Critical Inspection Items ............................................................................................. xi Principal Characteristics ............................................................................................................................. xii General Requirements WORK ITEM 1: General Welding, Provide WORK ITEM 2: Hull Plating (Side Scan), Ultrasonic Testing WORK ITEM 3: Ultrasonic Testing (U/W Body) Shots, Perform WORK ITEM 4: Hull Plating, U/W Body, Inspect WORK ITEM 5: Bulkhead Penetrations, Frame 5, Inspect WORK ITEM 6: U/W Body, Preserve, 100 percent WORK ITEM 7: Rub Rail, Remove, Inspect and Install WORK ITEM 8: Appendages, U/W, Leak Test WORK ITEM 9: Accessible Spaces, Inspect WORK ITEM 10: Tanks, MP Fuel Service, Clean and Inspect WORK ITEM 11: Buoyancy Chamber(s), Clean And Inspect WORK ITEM 12: Watertight Closures, Inspect WORK ITEM 13: Mast, Inspect WORK ITEM 14: Main Diesel Engine, Remove and Install WORK ITEM 15: Main Diesel Engine To Reduction Gear, Both, Align WORK ITEM 16: Cardan Shaft(S), Remove, Inspect And Reinstall WORK ITEM 17: Propulsion Shaft, Remove, Inspect, and Install WORK ITEM 18: Water Lubricated Bearings, Renew WORK ITEM 19: Propellers, Remove, Inspect, And Reinstall WORK ITEM 20: Main Diesel Engine Exhaust System, Clean And Inspect WORK ITEM 21: Main Diesel Engine Exhaust System, Component Renewal- MLB 47295 WORK ITEM 22: Fuel Root Valves, Renew WORK ITEM 23: Electrical Isolation, Perform WORK ITEM 24: Exterior Deck Lights, Inspect WORK ITEM 25: Various Piping, Inspect WORK ITEM 26: Lazarette Intake Vent, Inspect WORK ITEM 27: Sea Valves, Renew WORK ITEM 28: Sea Strainers, Duplex, All Sizes, Overhaul WORK ITEM 29: Sea Strainers, Simplex, All Sizes, Clean and Inspect WORK ITEM 30: Diesel Tanks, Refuel WORK ITEM 31: Steering System, Inspect WORK ITEM 32: Rudder Assembly, Remove, Inspect and Reinstall WORK ITEM 33: Tow Reel, Overhaul WORK ITEM 34: Windshield Wipers, Remove, Inspect and Install WORK ITEM 35: Hull Identification Markings, Apply WORK ITEM 36: Cathodic Protection / Zincs, Renew WORK ITEM 37: Exterior Non-Slip Pads, Renew WORK ITEM 38: Interior Hull Insulation, Renew WORK ITEM 39: Marine Chemist Services, Provide WORK ITEM 40: Drydock WORK ITEM 41: Temporary Services, Provide WORK ITEM 42: Sea Trial Performance, Support, Provide iii (Rev-0)

WORK ITEM 43: Fuel Sending Unit, Renew WORK ITEM 44: Bilge Preservation, Auxiliary Space iv (Rev-0)

REVISIONS RECORD

This page is used to record specification revisions, which may have occurred subsequent to a Revision 0 (Rev-0) package. Information listed is intended to provide contractors and field unit personnel a means to ensure all the current specification revision pages are present when reviewing or utilizing this specification package.

DATE REV# WORK

ITEM#

CHANGES MADE

NOTE: All work item and paragraph numbers listed above for a given revision correspond to same numbers in the previous revision. This revised specification is self-contained with all of the above listed changes incorporated.

v (Rev-0)

CONSOLIDATED LIST OF REFERENCES

The below-listed documents form a part of this specification to the extent specified herein. Approval/publication dates or revision dates/numbers are also identified, to ensure that same document versions are used at the time of specification writing and during contract execution.

All Coast guard drawings, technical publications, and standard specifications will be provided to contractors by the Coast Guard at an appropriate time, or upon request, free of charge. Other Government documents may be accessed – free of charge – from links located on the SFLC website. Commercial sites provide access to their respective documents.

COAST GUARD DRAWINGS

Coast Guard Drawing 47 MLB 252-10, Rev K, Propulsion System Control

Coast Guard Drawing 47 MLB 300-10, Rev C, Electrical Load Analysis

Coast Guard Drawing 47 MLB 300-20, Rev L, Motor Lifeboat Electrical one Line Diagram

Coast Guard Drawing 47 MLB 301-10, Rev P, Electrical Arrangement Panel Installation & Details

Coast Guard Drawing 47B MLB 110-207, Rev E, Transverse BHD FR 8

Coast Guard Drawing 47B MLB 110-209, Rev C, Transverse BHD FR 10

Coast Guard Drawing 47B MLB 110-306, Rev H, Web Frame 9

Coast Guard Drawing 47B MLB 110-500, Rev J, Shell Plating

Coast Guard Drawing 47B MLB 150-090, Rev E, Aft Buoyancy Box

Coast Guard Drawing 47B MLB 171-010, Rev U, Mast

Coast Guard Drawing 47B MLB 201-010, Rev L, Machinery Arrangement

Coast Guard Drawing 47B MLB 313-001, Rev -, Standard Battery Connection Configuration

Coast Guard Drawing 47B MLB 505-020, Rev AB, Piping Arrangement in Hull

Coast Guard Drawing 47B MLB 625-010, Rev D, Window List

Coast Guard Drawing 47B MLB 801-002, Rev -, Docking Plan

Coast Guard Drawing 47B-MLB 110-201, Rev D, Transom

Coast Guard Drawing 47B-MLB 110-206, Rev F, Transverse Bhd Fr 5

Coast Guard Drawing 47B-MLB 110-208, Rev E, Fuel Tank

Coast Guard Drawing 47B-MLB 110-500, Rev J, Shell Plating

Coast Guard Drawing 47B-MLB 161-010, Rev M, Shaft Struts and Barrels

Coast Guard Drawing 47B-MLB 167-010 Rev M, List of Hatches and Manholes

Coast Guard Drawing 47B-MLB 171-010, Rev U, Mast

Coast Guard Drawing 47B-MLB 201-010, Rev L, Machinery Arrangement

Coast Guard Drawing 47B-MLB 243-010, Rev W, Propulsion Shafting Bearings & Seals

Coast Guard Drawing 47B-MLB 252-020, Rev H, Engine Remote Shutdown

Coast Guard Drawing 47B-MLB 259-020, Rev K, Engine Exhaust Arrangement

Coast Guard Drawing 47B-MLB 320-030, Rev J, Dk Plan/Schem/Wrg/ Windows Htrs / Blowers/Wipers

Coast Guard Drawing 47B-MLB 331-010, Rev N, Lights and Switches Installation

Coast Guard Drawing 47B-MLB 505-020, Rev AB, Piping Arrangement in Hull vi (Rev-0)

Coast Guard Drawing 47B-MLB 512-010, Rev N, HVAC Details & Arrangement

Coast Guard Drawing 47B-MLB 561-010, Rev J, Steering Gear & Controls

Coast Guard Drawing 47B-MLB 561-020, Rev E, Rudder Arrangement

Coast Guard Drawing 47B-MLB 562-010, Rev B, Rudder

Coast Guard Drawing 47B-MLB 582-030, Rev E, Towline Reel Arrangement

Coast Guard Drawing 47B-MLB 611-020, Rev M, Foam Fender Arrangement

Coast Guard Drawing 47B-MLB 631-010, Rev G, Hull Visual Identification

Coast Guard Drawing 47B-MLB 631-020, Rev L, Paint Schedule

Coast Guard Drawing 47B-MLB 633-010, Rev A, Cathodic Protection

Coast Guard Drawing 47B-MLB 634-010, Rev E, Deck Covering

Coast Guard Drawing 47B-MLB 635-010, Rev C, Hull Insulation

Coast Guard Drawing 47B-MLB 801-002, Rev -, Docking Plan

Coast Guard Drawing 47B-MLB 801-010, Rev R, Booklet of General Plans

Coast Guard Drawing FL-85-002, Rev A, GFE Boat Hot Work Diagrams

COAST GUARD PUBLICATIONS

Coast Guard Commandant Instruction (COMDTINST) M10360.3, Jun 2006, Coatings and Colors Manual Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2020, General

Coast Guard Technical Publication (TP) 3355, SWBS 086, Apr 2003, General Information Book

Coast Guard Technical Publication (TP) 3355, SWBS 086, Apr 2003, General Information Book Section A

Coast Guard Technical Publication (TP) 3355, SWBS 086, Apr 2003, General Information Book, Section A

Coast Guard Technical publication (TP) 3355, SWBS 086, Apr 2003, General Information Book, Section A, CH 6, Sec. II - Textron Service Bulletin - DDEC Disconnect Procedure

Coast Guard Technical Publication (TP) 3356, SWBS 167-202, Oct 2006, Manufacturer’s Information Book-SWBS Group(s) 167-202

Coast Guard Technical Publication (TP) 3358, SWBS 233, Jul 2003, Manufacturer’s Information Book – SWBS Group(s) 233

Coast Guard Technical Publication (TP) 3358, SWBS 233, Jul 2003, Manufacturer’s Information Book – SWBS Group(s) 233, Sections A-H

Coast Guard Technical Publication (TP) 3359, SWBS 241-541, Feb 2016, Manufacturer’s Information Book - SWBS Group(s) 241-541

Coast Guard Technical Publication (TP) 3359, SWBS 241-541, Feb 2016, Manufacturer’s Information Book - SWBS Group(s) 241-541, SWBS 241, Section A, Propulsion Reduction Gears

Coast Guard Technical Publication (TP) 3359, SWBS 241-541, Feb 2016, Manufacturer’s Information Book - SWBS Group(s) 241-541, SWBS 243, Section C, Propulsion Shafting

Coast Guard Technical Publication (TP) 3359, SWBS 241-541, Feb 2016, Manufacturer’s Information Book - SWBS Group(s) 241-541, SWBS 243, Sections A, B, C, D, Propulsion Shafting

Coast Guard Technical Publication (TP) 3359, SWBS 241-541, Feb 2016, Manufacturer’s Information Book - SWBS Group(s) 241-541, SWBS 245, Section A, Propellers, MY-T4

Coast Guard Technical Publication (TP) 3359, SWBS 241-541, Feb 2016, Manufacturer’s Information Book - SWBS Group(s) 241-541, SWBS 259, Section A, Exhaust System

Coast Guard Technical Publication (TP) 3359, SWBS 241-541, Feb 2016, Manufacturer’s Information Book – SWBS Group(s) 241-541, SWBS 520, Sea Water Systems vii (Rev-0)

Coast Guard Technical Publication (TP) 3359, SWBS 241-541, Feb 2016, Manufacturer’s Information Book – SWBS Group(s) 241-541, SWBS 520, Sea Water Systems

Coast Guard Technical Publication (TP) 3359, SWBS 259, Mar 2007, Manufacturer’s Information Book - Exhaust System

Coast Guard Technical Publication (TP) 3360, SWBS 555-671, Apr 2015, Manufacturer's Instruction Book - SWBS Group(s) 555-671, SWBS 582, Section A, Towline Reel, Series 30/14

Coast Guard Technical Publication (TP) 3360, SWBS 555-671, Apr 2015, Manufacturer's Instruction Book - SWBS Groups 555-671, SWBS 611, Section A, Hull Fittings

Coast Guard Technical Publication (TP) 3918A, SWBS 233, Jul 2003, DDEC III, Series 92, Service Manual - Sections 1 and 2

Coast Guard Technical Publication (TP) 3918C, SWBS 233, Jul 2003, DDEC III, Series 92, Service Manual - Sections 7 Thru 15

Coast Guard Technical Publication (TP) 4993, SWBS 593, Oct 2011, Nonskid Pads, Peel and Stick Catalog

Coast Guard Technical Publications (TP) 3360, SWBS 555-671, Apr 2015, Manufacturer’s Instruction Book - SWBS Group(s) 555-671, SWBS 561, Section A, Steering & Diving Control Systems

Requirements

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2020, General Requirements

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec Test), 2020, General Requirements

Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2020, Welding and Allied Processes

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2020, Requirements for Preservation of Ship Structures

Surface Forces Logistics Center Standard Specification 8634 (SFLC Std Spec 8634), 2020, Drydocking

Surface Forces Logistics Center Standard Specification 8635 (SFLC Std Spec 8635), 2020, Temporary Services

OTHER REFERENCES

American Society for Nondestructive Testing (ASNT) SNT-TC-1A, 2013, Recommended Practice for Personal Qualification and Certification in Nondestructive Testing

American Society of Mechanical Engineers (ASME) B16.34, 2004, Valves-Flanged, Threaded, and Welding End

ASTM International (ASTM) D1330, 2015, Standard Specification for Rubber Sheet Gaskets

ASTM International (ASTM) D5363, 2016, Standard Specification for Anaerobic Single-Component Adhesives (AN)

ASTM International (ASTM) D5363, Apr 2016; Standard Specification for Anaerobic Single-Component Adhesives (An)

ASTM Internationals (ASTM) D1330, 2016, Standard Specification for Rubber Sheet Gaskets

Code of Federal Regulations (CFR) Title 29, Part 1915, Jul 2019, Occupational Safety and Health Standards for Shipyard Employment

Commercial Item Description (CID) A-A-59313, Nov 2003, Thread Compound; Anti-seize, Zinc Dust- Petrolatum

International Standard for Organization (ISO) 484/2, Dec 2015, Shipbuilding - Ship Screw Propeller - Manufacturing tolerances - Part 2: Propellers of Diameter Between 0.80 and 2.50m, Inclusive viii (Rev-0)

International Standard Organization (ISO) 21940-11, Nov 2016, Mechanical Vibration - Rotor Balancing, Procedure and Tolerances for rotors with rigid behavior

Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) SP-61, 2003 Edition, Pressure Testing Of Steel Valves

Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) SP-67, 2002 Edition, Butterfly Valves

Manufacturers Standardization Society of the Valve and Fittings Industry (MSS) SP-72, 1999 Edition, Ball Valves with Flanged or Butt-Welding Ends for General Service

Manufacturers' Standardization Society of the Valve and Fittings Industry (MSS) SP-80, 2003 Edition, Bronze Gate, Globe, Angle and Check Valves

MIL-A-18001, May 2005, Anodes, Sacrificial Zinc Alloy (Commercially Accepted - ASTM B418)

MIL-G-24716A, Apr 1993, Gaskets, Metallic-Flexible Graphite, Spiral Wound

MIL-PRF-16173, Oct 2017, Corrosion Prevention Compound, Solvent Cut-Back, Cold-Application

MIL-S-45180, 1998, Sealing Compound, Gasket, Hydrocarbon Fluid and Water Resistant

MIL-S-45180, 1998; Sealing Compound, Gasket, Hydrocarbon Fluid and Water Resistant

Naval Sea Systems Command (NAVSEA) Underwater Ship Husbandry Manuals (UWSH) S0600-AA- PRO-160, Nov 2011, Chapter 16, Cofferdams

Society of Automotive Engineers (SAE) Aerospace Material Specification (AMS) C6183, 2019, Cork and Rubber Composition Sheet; for Aromatic Fuel and Oil Resistant Gaskets

Society of Automotive Engineers (SAE) Aerospace Material Specification (AMS) G-6032, 2020 Grease, Plug Valve, Gasoline and Oil Resistant, NATO Code Number G-363, Metric

Society of Automotive Engineers (SAE) AMS-G-6032, August 2012, Grease, Plug Valve, Gasoline and Oil Resistant, NATO Code Number G-363, Metric

The Society for Protective Coatings (SSPC) Surface Preparation Specification No. 1 (SSPC-SP 1), Apr 2015, Solvent Cleaning

The Society for Protective Coatings (SSPC) Surface Preparation Specification No.1 (SSPC-SP 1), 2016, Solvent Cleaning

The Society for Protective Coatings (SSPC), January 2015, Paint Application Specification No. 2 (PA-2), Procedure for Determining Conformance to Dry Coating Thickness Requirements

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface Preparation Standard SSPC-WJ-2/NACE WJ-2, Mar 2012, Water Jet Cleaning of Metals-Very Thorough Cleaning

The Society for Protective Coatings SSPC-SP 1, Apr 2015 (E Aug 2016), Solvent Cleaning

The Society for Protective Coatings SSPC-SP 2, Nov 1982 (E Nov 2004)-; Hand Tool Cleaning ix (Rev-0)

CONSOLIDATED LIST OF GOVERNMENT-FURNISHED PROPERTY

The following is a list of property, which the Government will furnish. This list supersedes any other material obligations indicated or implied by referenced drawings.

WORK

ITEM

MTI ITEM DESCRIPTION NSN/PN QTY ESTIMATED

COST

($/UNIT)

7 N Bow Fender NSN: 2040-01-458-7973 1 ea. 8,221.47

14 N Soft Patch Gasket NSN: 5330-01-631-0907 or

PN: 47-SPG-1

2 ea. 185.17

16 N *Seal, Shaft (Complete)

NSN: 2010-01-545-9932 2 ea. 1,990.87

17 N Shaft Seal (3-3/4) NSN: 2040-01-627-3245 or

PN: 02-212-334

2 ea. 341.50

18 N Upper Rudder Bearing NSN: 3120-01-469-8793 2 ea. 159.37 18 N Lower Rudder Bearing NSN: 3120-01-469-8769 2 ea. 208.93 18 N Shaft Bearing Strut

Tube NSN: 3120-01-366-0506 2 ea. 396.88

18 N Shaft Bearing Stern Tube

NSN: 3120-01-365-9410 2 ea. 290.75

21 N *Elbow Assembly, Pipe, Port Eng

NSN: 4730-01-521-1332 or

PN: B96-111601

1 ea. 1,441.37

21 N * Elbow Assembly, Pipe, Stbd Eng

NSN: 4730-01-521-2406 or

PN: B96-111702

1 ea. 1,539.88

21 N *Exhaust Riser Assembly, Port

NSN: 2815-01-521-1369 PN:

C96-111001

1 ea. 3,695.00

21 N *Exhaust Riser Assembly, Stbd

NSN: 2815-01-521-2399 or

PN: C96-111102

1 ea. 3,566.72

21 N *Elbow, Turbo Adapter, Port Eng

NSN: 4730-01-521-0529 or

PN: B96-111501

1 ea. 1,532.90

21 N *Elbow, Turbo Adapter, Stbd Eng

NSN: 4730-01-521-2374 or

PN: B96-111402

1 ea. 1,532.26

21 N *Bellows Assembly NSN: 3010-01-446-1429 or

PN: B95-113100

2 ea. 160.08

21 N *Clamp, V-Band, 5” NSN: 5340-01-593-2907 or

PN: 024-001000

2 ea. 35.06

21 N *Clamp, V-Band, 6” NSN: 5340-01-568-6902 or

PN: 024-005000

4 ea. 52.39

21 N *Clamp, V-Band, 8” NSN: 5340-01-568-6899 or

PN: 024-007000

4 ea. 50.15

27 N Main Engine R/W supply valve

NSN: 4820-01-544-1003 or

PN: S-135JW2PPPPP2-HSV

2 ea. 1,710.15

27 N HVAC Suction Sea Valve

NSN: 4820-01-274-6687 or

PN: 70-106-01

1 ea. 31.29

32 N *Rudder assembly NSN: 2040-01-444-6315 1 ea. 4,438.70 36 N Zinc, Barrel shape NSN: 5342-01-366-3891 6 ea. 24.03 36 N Zinc, Oblong shape NSN: 5340-01-381-0840 2 ea. 49.40 37 N 47 MLB Non-Slip Pad NSN: 2040-00-NIB-0342 1 ea. 3,164.21 x (Rev-0)

Kit 37 N Edge Sealing

Compound NSN: 8030-01-580-0926 12 ea. 10.90

40 Y *Transducer Cover Plate

N/A 1 ea. 50.00

43 N Fuel Sending Unit PN: 226-001 1 ea. 52.16 *Government-loaned property, which shall be returned to the vessel upon completion of the availability.

**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 ServiceCenter xi (Rev-0)

CONSOLIDATED LIST OF CRITICAL INSPECTION ITEMS

The following is a list of work items, which contain Critical Inspection reports, which the Contractor must complete within the first 25% of the availability contract period (see SFLC Std Spec 0000, paragraph 3.2.6.5 (Inspection report particulars)):

Work Item

Title

2 Hull Plating (Side Scan), Ultrasonic Testing

3 Ultrasonic Testing (U/W Body) Shots, Perform

6 U/W Body, Preserve, 100 percent

7 Rub Rail, Remove, Inspect and Install

8 Appendages, U/W, Leak Test

9 Accessible Spaces, Inspect

15 Main Diesel Engine To Reduction Gear, Both, Align

16 Cardan Shaft(S), Remove, Inspect And Reinstall

17 Propulsion Shaft, Remove, Inspect, and Install

26 Lazarette Intake Vent, Inspect

28 Sea Strainers, Duplex, All Sizes, Overhaul

29 Sea Strainers, Simplex, All Sizes, Clean and Inspect

32 Rudder Assembly, Remove, Inspect and Reinstall

40 Drydock xii (Rev-0)

PRINCIPAL CHARACTERISTICS

47' MLB, MOTOR LIFE BOAT

PHYSICAL

Length, overall 47' 11" (W/O Rubrails) - 48' 11" Length, waterline 43” Beam, overall 14' (W/O Rubrails) - 15' Depth 4' 6" Full load displacement 40,000 lbs Full load draft 4' 6" Height of highest projection 18' 6" (fixed height) - 28' 4"

HULL

Hull/superstructure material 5456 Aluminum Frame spacing FR 0 to 8 30" - 31" FR 8 to 10 33" FR 10 to 18 30"

MACHINERY

Engine details (2) DD 6V92TA DDEC III, 435 SHP each @ 2100 RPM Electrical system 24 Volt DC Number of propellers 2 Number of blades 4 Diameter 28" Pitch 36" Shaft- diameter x length (in) 2.50” x 159.0” Shore tie voltage requirements 120 VAC (100A)

PERFORMANCE

Maximum speed at sea state 0 25 knots (2050-2200 RPM) Cruise speed at sea state 2 20 knots (1850 RPM) Max idle speed 6 knots (600 RPM) Fuel capacity (diesel) 394 gal.

Range at cruise, sea state 0 200 NM

1 (Rev-0)

00000_0522_FLT

REC_00000_FLT_Boats @ Commercial Facility (0121)

General Requirements

1. SCOPE

1.1 Intent. This standard specification invokes general requirements for conducting boat repairs performed at a commercial contractor’s facility for Coast Guard vessels.

1.1 Term interchangeability. The terms 'Contractor', 'CG Yard', 'NAVSTA EVERETT', 'shipyard', 'Base', and 'Coast Guard Industrial' are used interchangeably in this specification. Where the primary service provider is Coast Guard personnel, references to contractor and other noted descriptors within this specification or within drawings, publications, SFLC Standard Specifications or other commercial and military references are deemed the same as prime service provider.

2. REFERENCES

COAST GUARD DRAWINGS

None

COAST GUARD PUBLICATIONS

Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Coatings and Color Manual

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2020, General Requirements

Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2020, Welding and Allied Processes

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2020, Requirements for Preservation of Ship Structures

OTHER REFERENCES

None

3. REQUIREMENTS

3.1 General. The Contractor must conform to all requirements specified in SFLC Std Spec 0000 and in this item, as applicable, during the performance of this availability. The requirements of this WI applies to all work under the scope of this contract, whether explicitly stated in all following work items or not, and to all other work subsequently authorized by changes, modifications, or extensions to the contract.

3.1.1 The Contractor must conform to all requirements specified in SFLC Std Spec 5550 and in the Fire Protection and Response work item, as applicable, during the performance of this availability.

2 (Rev-0)

3.1.1 NAVSEA drawings listed will be available FOR INSPECTION ONLY from the Coast Guard Port Engineer post-award. SFLC will not redistribute NAVSEA documents. Contractors can apply to NAVSEA headquarters directly for copies.

3.2 Contractor-provided fire watch personnel. The Contractor must provide fire watch personnel and equipment.

3.3 Preservation requirements. The Contractor must accomplish all preservation tasks, including touch-ups, in accordance with SFLC Std Spec 6310.

3.3.1 Brand name approval. Ensure that all contractor-furnished coatings are in accordance with SFLC Std Spec 6310, Appendix C (Authorized Coatings for Use on Cutters and Boats).

3.3.2 Coating colors and system color schemes. The Contractor must obtain a written KO authorization to deviate from any coatings required in SFLC Std Spec 6310 Appendix C before work.

3.4 Welding and brazing requirements. The Contractor must perform all welding and allied processes, and NDE in accordance with SFLC Std Spec 0740.

3.5 Environmental protection requirements. The Contractor must adhere to the following environmental protection requirements in accordance with the SFLC Stand Spec 0000:

3.5.1 Contractor operated (non USCG) facilities. The Contractor must provide and maintain environmental protection as defined in SFLC Std Spec 0000 Appendix A, Requirements for Environmental Protection at Contractor Operated (Non USCG) Facilities, as applicable, during the performance of this availability. Contractor must plan for and provide environmental protective measures to control pollution that develops during normal practice, as well as plan for and provide environmental protective measures required to correct conditions that develop during the project. Contractor must comply with applicable Federal, state, and local laws, codes, ordinances, and regulations in their entirety. Any reference to a specific portion of a Federal, state, or local law, code, ordinance, or regulation in this or any other item must not be construed to mean that relief is provided from any other sections of the law, code, ordinance, or regulation.

3.5.2 Test and procedures. The Contractor must be required to promptly conduct tests and procedures for the purpose of assessing whether operations are in compliance with applicable Environmental Laws. Analytical work must be done by qualified laboratories; and where required by law, the laboratories must be certified.

3.5.3 Regulatory notifications. The Contractor must be responsible for all regulatory notification requirements in accordance with Federal, State and local regulations. In cases where the Coast Guard must also provide public notification, such as storm water permitting, the Contractor must coordinate with the Contracting Officer or COR, and if work is being performed at a USCG Facility, the local Facility Engineer or Engineering Officer. The Contractor must submit copies of all regulatory notifications to the Contracting Officer and the local Facility Engineer or Engineering Officer prior to commencement of work activities. Regulatory notifications must be provided for including but not limited to demolition, renovation, National Pollutant Discharge Elimination System (NPDES) defined site work, and remediation of controlled substances such as asbestos, hazardous waste, and lead paint.

3.5.4 Environmental manager. The Contractor must appoint in writing an Environmental Manager for the project, and must be responsible for coordinating Contractor compliance with Federal, State, local, and station environmental requirements. The Environmental Manager must ensure compliance with Hazardous Waste Program requirements, including hazardous waste handling, storage, manifesting, and disposal; implement the Contractors’ Environmental Management Plan; ensure that all environmental permits are obtained, maintained, and closed out; ensure compliance with Storm Water Program Management requirements; ensure compliance

3 (Rev-0) with Hazardous Materials including storage, handling, and reporting requirements; as well as coordinate any remediation of regulated substances such as lead, asbestos, and polychlorinated biphenyl (PCB). This may be a collateral position; however the individual must be trained to accomplish the following duties; ensure waste segregation and storage compatibility requirements are met; inspect and manage Satellite Accumulation areas;

ensure only authorized personnel add wastes to containers; ensure all Contractor personnel are trained in 40 CFR requirements and individual position requirements; coordinate removal of waste containers; and maintain the Environmental Records binder and required documentation, including environmental permits compliance and close-out.

3.5.5 HW disposal. Contractor must comply with SFLC Std Spec 0000 Appendix A, Requirements For Environmental Protection At Contractor Operated (Non USCG) Facilities for HW disposal.

3.6 Local Policy. The Contractor must refer to site (e.g. Base) Regulations and Instructions for details regarding local policies (e.g. crane services, parking, or facility usage).

3.6.1 Coast Guard turn-over preparation. The Contractor must be aware that, upon arrival, after haul out, and prior to departing the Contractor’s facility, the Coast Guard crew must be allowed to accomplish various tasks in preparation for the turn-over of the boat to the Contractor. The following conditions apply to this paragraph:

3.6.1.1 The Coast Guard requires a maximum of three days at the beginning of the contract, and three days at the end to accomplish various tasks.

3.6.1.2 The Contractor may commence/continue work during these time frames.

3.6.1.3 Coast Guard personnel will disconnect the Detroit Diesel Electronic Control (DDEC) System and any other electronic equipment, as required to avoid damage to systems arising from hotwork on the vessel during the availability.

3.6.1.4 Coast Guard personnel will remove the transducers after initial haul-out and reinstall prior to re-floating the vessel.

3.6.1.5 The Unit will contact the servicing ESD or ESU to setup removal/installation of the transducer if Unit personnel are unable to accomplish this task.

3.7 SFLC Standard Specification approved changes. The Contractor must be aware that the following are approved changes to published SFLC 2020 Edition Standard Specifications and supersede published content:

3.7.1 SFLC Standard Specification 8636. Add missing paragraphs between 3.2 and 3.5 of Std Spec 8636 as follows:

3.8 Access cut boundaries. The Contractor shall ensure that access cuts comply with the requirements and restrictions detailed in the following and in SFLC Std Spec 0740, and referenced codes.

3.8.1 Location of boundaries. Boundaries of access cuts and closure plates shall, in general, be located between principal ship framing, bulkheads, and other structural members and shall be at least three inches from any of these members or from the toes of other welds. A reduction in this three inch minimum may be approved by the KO on a case by case basis provided sufficient clearance is maintained for welding and inspection requirements.

The boundaries of access cuts and closure plates should land on existing butts or seams, wherever practicable. The

4 (Rev-0) boundaries of prior access cuts should be utilized wherever possible. Boundaries may extend across one or more frames as required for the size of the opening.

3.8.2 Access hole dimensions and arrangements. Holes or access cuts shall be the minimum size necessary and shall be in accordance with the following:

• Rectangular access cuts and closure plates welded into primary hull structure shall be at least 12 inches wide in the lesser dimension.

• For circular access cuts, the minimum diameter shall be 4T, where T = thickness of the involved structural member, but not less than three inches.

• Circular closure plates for access cuts less than two feet in diameter shall be dished 1/16 to 1/8 inch to allow for shrinkage when welded.

• Corners of rectangular access cuts and closure plates shall have a minimum radius of 6 inches except when a boundary lands on an existing hull longitudinal seam or transverse butt weld.

• Corners at an existing seam or butt shall intersect at a 90-degree angle.

• Cuts that are to cross existing butts or seams shall do so at an angle of 90 degrees plus or minus 15 degrees.

• In primary hull structure, existing welds forming the boundary of a cut shall be cut back 3 inches beyond the toe of the access cut, except that the cut back shall not intersect or cross an existing weld, frame, or structural member. In which case, the cut back may be reduced to a minimum of two inches in length.

• Existing welds crossed by the cut shall not be cut back.

3.8.3 Primary hull structure. Primary Hull Structure includes the shell, main strength decks, principal longitudinal bulkheads, vertical keel, deep web girders and stiffeners designed to withstand the ship bending stress.

3.8.4 Mechanically fastened joints. Welding closer than six inches to a mechanically fastened joint should be avoided. When access cuts cross or come within six inches of a mechanically fastened joint, the fasteners shall be checked for tightness and if necessary, loose fasteners shall be seal welded or removed, and replaced for a distance of 6 inches beyond the edge of the cut. When a cut crosses a mechanically fastened seam the cut plates shall be repaired using single V welds backed with glass tape (MIL-C-20079) to prevent fusion between the mechanically fastened plates.

3.9 Ship integrity maintenance. The Contractor shall maintain safety and ship integrity by installing temporary guarding and coaming, in addition to weathertight and watertight closures. Remove these temporary fabrications after closing the hull access, and grind surfaces flush in way of removals. For shell plating cuts made at or below the waterline where temporary closures are impractical, the Contractor shall secure each vulnerable compartment and subdivision to minimize potential damage to the extent permitted by the scope and urgency of the work.

3.9.1 Guarding. Install temporary guards in accordance with 29 CFR 1915.73.

5 (Rev-0)

3.9.2 Coaming. Ensure that in areas where flammable liquids may be stored, a 4-inch-high metal coaming shall be installed on the surface of the deck with tack welds and fully sealed with caulking compound. The coaming shall encircle the access cut in the deck.

3.9.3 Weathertight and contamination closures. Fabricate temporary closures, using fire retardant material, before cutting access openings and install closures whenever access is not in use. Closures shall be:

• Constructed to protect the access from inclement weather and entry of contaminants (shall include a coaming or dam on the deck to redirect rain runoff away from the opening).

• Fitted with fasteners that permit rapid installation and removal.

• Able to support a minimum of 150 pounds per square foot for horizontal deck closures.

• Where the access opening is in way of a removed hatch, scuttle or door, the closure shall be configured to allow normal passage of ship’s personnel and equipment.

3.9.4 Watertight closures. Ensure that access openings created four feet or less above the maximum anticipated waterline shall include temporary watertight closures when the vessel is waterborne.

NOTE

NAVSEA S0600-AA-PRO-160/CH16 provides requirements for design, fabrication, and installation of temporary watertight closures.”

4. NOTES

4.1 QA inspection forms. QA inspection forms (QA-1 thru QA-5), required in SFLC Std Spec 6310 to be completed and submitted during preservation of “critical-coated surfaces”, are provided at the end of this document.

6 (Rev-0)

QA-1 - QUALITY ASSURANCE INSPECTION FORM

(PRESERVATION CHECKLIST)

VESSEL NAME HULL # WORK ITEM

WORK ITEM TITLE

LOCATION OF WORK (INCL. FRAME #’S) AREA (SQFT)

CHECKPOINT 1 – COATING SYSTEM COMPLIANCE

Ensure all coatings are in compliance with SFLC Std Spec 6310, Appendix C.

CHECKPOINT 2 - PAINT STORAGE

Ensure all coatings are kept at a temperature of 65 to 85°F at all times, unless otherwise specified by the coating mfg.

CHECKPOINT 3 - AMBIENT CONDITIONS

Ensure surface and surrounding temperatures are each between 50 and 90°F for water-containing coatings, and 35 and 95°F for other coatings, unless otherwise specified by the coating manufacturer(s).

Ensure maximum relative humidity (RH) is as follows, from surface preparations through final curing of topcoat: 50% for tanks, voids, and vent plenum; and 85% for all other areas, unless otherwise specified by manufacturer(s).

Ensure surface temperature is at least 5°F above the dew point, unless otherwise specified by the coating mfg.

CHECKPOINT 4 - PRE-SURFACE PREPARATION

Remove surface contaminants (soluble salts, loose rust, mud, and marine growth) with low pressure fresh water wash down (maximum 5,000 psi). If oil and grease are present, perform solvent cleaning, as per SSPC SP-1.

Verify equipment setup, blast media, and surface preparation methods match designated test coupon.

CHECKPOINT 5 - SURFACE PREPARATION

Verify environmental conditions (see CHECKPOINT 3).

Ensure cleanliness of prepared surface is as per specification (i.e.: SSPC SP-11, SP-10, SP WJ-2…).

Verify surface anchor profile using ASTM D4417-Methods B or C against SFLC Std Spec 6310. Conduct profile readings at a minimum of 5 locations for the first 1000-sqft area, and 2 locations for each succeeding 1000-sqft area.

Measure soluble salt conductivity in accordance with SSPC-Guide 15. Conduct 5 measurements per each 1000-sqft area (max. threshold: 70 microsiemens/cm for non-submerged surfaces, 30 microsiemens/cm for submerged surfaces).

CHECKPOINT 6 - PRIMER COAT APPLICATION

Verify environmental conditions (see CHECKPOINT 3).

Verify proper mixing and stand-in (induction) times.

Ensure no paint is applied when the temperature is expected to drop to freezing before the paint has dried.

Ensure surfaces are completely dry, unless otherwise allowed by the coating manufacturer(s).

Verify wet film thickness (WFT) at random, to prevent under or over application. Verify final DFT.

Brush out all runs, sags, drips, and puddles.

Perform visual inspection for holidays and other defects.

CHECKPOINT 7 – STRIPE COAT APPLICATION

Verify environmental conditions (see CHECKPOINT 3).

Ensure overcoating window is as per manufacturer’s instructions.

After primer coat (mist coat after inorganic zinc), brush-apply un-thinned coat of same primer paint over edges, weld seams, cut-outs, and areas of complex geometries @ 3-4 mils wet film thickness (WFT).

CHECKPOINT 8 – TOP COAT APPLICATION

Verify environmental conditions (see CHECKPOINT 3).

Ensure overcoating window is as per manufacturer’s instructions.

Verify proper mixing and stand-in (induction) times, as applicable.

Verify wet film thickness at random, to prevent under or over application.

Brush out all runs, sags, drips, and puddles.

CHECKPOINT 9 – FINAL INSPECTION

Verify final system dry film thickness. Conduct 5 sets of 3 readings for each of the first 3 100-sqft areas, followed by 5 sets of 3 readings for each succeeding 1000-sqft area.

Ensure that system cure is in accordance with manufacturer's recommendation for intended service.

Ensure potable water tank exhaust ventilation is maintained continuously from and during coating application through final system cure, to exhaust all solvent to the atmosphere and to prevent solvent entrapment.

For immersion coatings (including tank U/W body), record date and time of the following events:

Final coat application: _____/_____; Return to service or removal from environment controls: _____/_____

CHECKPOINT 10 – RECORD KEEPING

Complete, sign, and submit all provided QA Inspection Forms.

NAME OF QP-1/NACE INSPECTOR SIGNATURE CERT. # DATE / TIME

NAME OF CG REPRESENTATIVE SIGNATURE UNIT DATE/TIME

7 (Rev-0)

QA-2 - QUALITY ASSURANCE INSPECTION FORM

(ENVIRONMENTAL READINGS)

VESSEL NAME HULL #

WORK ITEM

Use one sheet for each activity. Record conditions every four hours from before surface preparation to application of final coating system coat.

DATE

TIME

ACTIVITY (SURFACE

PREPARATION, PRIMER COAT,

BARRIER COAT, TOP COAT,

ETC…)

LOCATION (FRAME &

DECK, RELATION TO

EQUIPMENT, ETC.)

TEMPERATURE % REL.

HUMID-

ITY

DEW

PT.

SURFACE AMBIENT ΔT

| DP -

SURFACE |

8 (Rev-0)

QA-3a - QUALITY ASSURANCE INSPECTION FORM

(SURFACE PROFILE LOG FOR PROFILE MEASUREMENTS IAW ASTM D4417-METHOD-C)

VESSEL NAME HULL # WORK ITEM

LOCATION OF WORK (FRAME REFERENCES) AREA (SQFT)

SURFACE PREPARATION METHOD PROFILE ACHIEVED (MILS)

MIN MAX MEAN

SSPC-SP-10/NACE No. 2

SSPC-SP WJ-2/NACE WJ-2

SSPC-SP-3

SSPC-SP-11

SSPC-SP-11 (inaccessible area) Brush-blasting (non-metallic substrate)

ABRASIVE MANUFACTURER: ABRASIVE SIEVE SIZE:

PLACE SURFACE PROFILE REPLICA TAPES IN THE SPACES PROVIDED BELOW, TO SERVE AS

PERMANENT QA RECORD. MAINTAIN A SEPARATE LOG FOR EACH LOCATION. WHEN AN AREA IS

DIVIDED INTO SEPARATE SECTIONS, MAINTAIN A SEPARATE LOG FOR EACH SECTION.

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Reading (mils): Reading (mils): Reading (mils):

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Reading (mils): Reading (mils): Reading (mils):

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Reading (mils): Reading (mils): Reading (mils):

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Reading (mils): Reading (mils): Reading (mils):

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Place Surface Profile Replica Tape Here

Reading (mils): Reading (mils): Reading (mils):

MEAN MIL READING (IAW ASTM D4417-METHOD C) FOR ABOVE 15 READINGS:

NAME OF QP-1/NACE INSPECTOR SIGNATURE CERT. # DATE /

TIME

9 (Rev-0)

QA-3b - QUALITY ASSURANCE INSPECTION FORM

(SURFACE PROFILE LOG FOR PROFILE MEASUREMENTS IAW ASTM D4417-METHOD-B)

VESSEL NAME HULL # WORK ITEM

SURFACE PREPARATION METHOD PROFILE ACHIEVED (MILS)

MIN MAX MEAN

SSPC-SP-10/NACE No. 2

SSPC-SP WJ-2/NACE WJ-2

SSPC-SP-3

SSPC-SP-11

SSPC-SP-11 (inaccessible area) Brush-blasting (non-metallic substrate)

ABRASIVE MANUFACTURER: ABRASIVE SIEVE SIZE:

RECORD MEASUREMENTS TAKEN IN THE SPACES PROVIDED BELOW, TO SERVE AS PERMANENT QA

RECORD. MAINTAIN SEPARATE LOG FOR EACH LOCATION. WHEN AN AREA IS DIVIDED INTO

SEPARATE SECTIONS, MAINTAIN A SEPARATE LOG FOR EACH SECTION.

Reading (mils):

Reading (mils):

Reading (mils):

Reading (mils):

Reading (mils):

Reading (mils):

Reading (mils):

Reading (mils):

Reading (mils):

Reading (mils):

Mean Mils Reading (IAW ASTM D4417-Method B for above 10 readings (by column):

Mean Reading (mils)

10 (Rev-0)

QA-4 - QUALITY ASSURANCE INSPECTION FORM

(SURFACE SOLUBLE SALT CONDUCTIVITY LOG)

VESSEL NAME HULL # WORK ITEM

SOLUBLE SALT CONDUCTIVITY MEASUREMENTS IAW SSPC-GUIDE 15.

DATE TEST LOCATIONS CONDUCTIVITY (MICROSIEMENS/CM)

11 (Rev-0)

QA-5 - QUALITY ASSURANCE DATA FORM

(COATING THICKNESS)

(Use one sheet for each sequence)

VESSEL NAME HULL #

WORK ITEM

COATING MFG PRODUCT NAME

BATC

H #

INDUCTI

ON TIME

COATING SYSTEM

SEQUENCE

(PRIMER/TOUCHUP/3RD

COAT, ETC.)

DRY FILM THICKNESS (DFT) MEASUREMENTS IAW SSPC-PA 2.

SPOT 1 2 3 4 5

AVERAGE

VALUE

*BASE METAL READING

(BMR)

*Required, If Magnetic Pull-Off (Type I/Banana) Gauge Is Used.

LOCATION (FRAME REFERENCE):

SPOT 1 2 3 4 5 OVERALL AVG. DFT ADJUSTMENTS

1 AVG. BMR DEVIATION

3 BEFORE ADJUSTMENTS AFTER ADJUSTMENTS

AVG.

LOCATION (FRAME REFERENCE):

SPOT 1 2 3 4 5 OVERALL AVG. DFT ADJUSTMENTS

1 AVG. BMR DEVIATION

3 BEFORE ADJUSTMENTS AFTER ADJUSTMENTS

AVG.

LOCATION (FRAME REFERENCE):

SPOT 1 2 3 4 5 OVERALL AVG. DFT ADJUSTMENTS

1 AVG. BMR DEVIATION

3 BEFORE ADJUSTMENTS AFTER ADJUSTMENTS

AVG.

APPLICATION METHOD (AIRLESS,

CONVENTIONAL SPRAY, ROLLED)

AVERAGE DFT

12 (Rev-0)

4.2 Tank and Void Assessment form.

13 (Rev-0)

14 (Rev-0)

07400_AKP_0822_BOAT_FLT

WORK ITEM 1: General Welding, Provide

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to provide general welding.

TABLE 1 – WELDING

ITEM DESCRIPTION LOCATION APPROXIMATE

SQFT.

Perform Clad Welding FWD Anchor Locker 12 Square Inches

Perform Clad Welding Starboard AFT Deck Box 12 Square Inches

Perform Clad Welding Center AFT Deck Box 12 Square Inches

Perform Clad Welding Port AFT Deck Box 12 Square Inches

Perform Clad Welding FWD Line Locker 12 Square Inches

Perform Clad Welding Forepeak 10 Square Inches

Perform Clad Welding Auxiliary Space 30 Square Inches

Perform Clad Welding Survivor’s Compartment Bilge (at COR’s Discretion)

36 Square Inches

Perform Clad Welding Engine Room (at COR’s Discretion) 48 Square Inches

Perform Clad Welding Lazarette Bilge (at COR’s Discretion) 12 Square Inches

Contractor shall fabricate and weld a structural modification on the Tow Reel mounts. (see photos below).

Bushing brackets shall be removed and mounted 90 degrees clockwise from original position. (see photos) This Item is separate from WI: 31 Tow Reel, Overhaul

Tow Reel Bracket MOD

15 (Rev-0)

Images of Tow Reel Mount

1.2 Government-furnished property.

None.

16 (Rev-0)

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing FL-85-002, Rev A, GFE Boat Hot Work Diagrams

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2020, General Requirements

Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2020, Welding and Allied Processes

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2020, Requirements for Preservation of Ship Structures

OTHER REFERENCES

None

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None.

3.1.2 Tech Rep.

None.

3.1.3 Protective measures. The Contractor must furnish and install all protective measures in accordance with SFLC Std Spec 0000, paragraph 3.3.3 (Vessel component, space, and equipment protection).

3.1.4 Interferences. The Contractor shall handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences).

3.2 Requirement. The Contractor shall provide general welding, including but not limited to, fabrication, brazing, inspection, plate renewal, crack repair, overlay, and associated processes on Coast Guard vessels and equipment in accordance with Coast Guard Drawing FL-85-002 and SFLC Std Spec 0740.

3.3 Bidding. The Contractor shall ensure for bidding purposes this specification will be broke down by the following:

One linear foot of welding/brazing.

Four square inches of clad/overlay welding.

One hour of fabrication.

One square foot of plate renewal.

17 (Rev-0)

TABLE 1 – PLATE TYPE

STEEL PLATE ALUMINUM PLATE

THICKNESS WEIGHT

PER SQFT.

TYPE/GRADE THICKNESS WEIGHT

PER SQFT

TYPE/ALLOY

3/16 (.1875) 7.66 lb 1/4 (.250) 10.21 lb 1/4 (.250) 3.53 lb 5/16 (.3125) 12.76 lb 5/16 (.3125) 4.41 lb 3/8 (.375) 15.31 lb 3/8 (.375) 5.29 lb 1/2 (.500) 20.42 lb 1/2 (.500) 7.06 lb

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

4. NOTES

This section is not applicable to this work item.

18 (Rev-0)

11000_SideScan_0721_FLT REC_11000_Side_Scan_FLT_47 MLB (ALL) (0619)

WORK ITEM 2: Hull Plating (Side Scan), Ultrasonic Testing

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to perform thickness measurements of underwater (u/w) hull plating by ultrasonic side scan method.

1.2 Government-furnished property.

None.

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 47B MLB 110-500, Rev J, Shell Plating

Coast Guard Drawing 47B MLB 801-002, Rev -, Docking Plan

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2020, General Requirements

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec Test), 2020, General Requirements

OTHER REFERENCES

American Society for Nondestructive Testing (ASNT) SNT-TC-1A, 2013, Recommended Practice for Personal Qualification and Certification in Nondestructive Testing

3. REQUIREMENTS

3.1 General.

3.1.1 CIR. The Contractor must submit a CIR for the inspections listed in the following paragraph(s):

3.2 Side scan requirements and procedures.

3.1.2 Tech Rep.

Not applicable.

19 (Rev-0)

3.1.3 Protective measures. The Contractor shall furnish and install all protective measures in accordance with SFLC Std Spec 0000, paragraph 3.3.3 (Vessel component, space, and equipment protection).

3.1.4 Interferences. The Contractor must 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:

Hull zinc anode system

Docking blocks.

3.2 Work coordination and preparation. The Contractor must plan all specified vessel work detailed in this specification package to ensure the side scan survey does not necessitate a work stoppage. The Contractor must abide by the following guidance, to facilitate the ultrasonic survey:

Ensure that all u/w body surface preparation and primer coat application tasks are completed within ten days of lifting the vessel.

Provide a continuous supply of fresh water at .50 gpm within 50 feet of the vessel with standard hose bib fitting.

Provide 110 VAC electrical power, and scaffolding or other suitable means of access to bring inspection personnel within one foot of all the body surface inspection areas that are five feet above ground level.

After completion of the hull survey, and authorized hull repairs, resume/complete u/w body preservation process by applying the second coat of the anti-corrosive coating system, and all anti-fouling paint coats.

Pay close attention to manufacturer’s recommended practices in regards to paint system overcoat time limitations and required degree of surface cleanliness prior to resuming u/w body coating application.

3.3 Side scan requirements and procedures. The Contractor must ensure the following referring to the Coast Guard drawings listed in Section 2 (References) herein as guidance during the performance of the tasks specified below and submit a CIR.

3.3.1 Testing company and personnel. Provide the services of a qualified ultrasonic testing company, with suitable side scan equipment, to conduct a “Scanning Crawler Automated Test” of the vessel’s u/w hull plating for the presence of metal corrosion and deterioration. Ensure the following:

All scanning operations are completed by personnel meeting the personnel qualification and certification, as required by contractor process. This contractor developed personnel qualification and certification process must meet, at a minimum, ASNT Recommended Practice No. SNT-TC-1A.

An SNT Level III Analyst is on site, to oversee the project and evaluate the collected data.

An SNT Level III or II Analyst is on site, to verify with a hand held gauge all areas on the hull identified as thinner than the specified criteria, in order to expedite all repair procedures.

Qualified personnel are provided to complete all on-site corrosion inspections.

3.3.2 Coast Guard notification. Accomplish all required tasks within 10 calendar days of the start of the availability.

3.3.2.1 Provide a daily update to the COR on all areas inspected and potential issues or schedule changes.

20 (Rev-0)

3.3.2.2 Notify the COR at least 3 days prior to completion for an onsite review of readings and repair areas.

3.3.3 Scanning parameters. Use the following parameters during the course of this inspection:

Automated scanning resolution shall be set to 0.5” x 0.5”

Plates where scan data indicating wastage greater than or equal to 25% nominal plate thickness shall be highlighted in “RED” and designated “repair areas”.

Plates where scan data indicating wastage greater than or equal to 15% to 24% of nominal plate thickness shall be highlighted in “YELLOW”.

Plates where scan data indicating wastage greater than or equal to 10% to 14% of nominal plate thickness shall be highlighted in DARK GREEN.

Handheld UT readings shall be taken to verify bad metal areas found with the side scan equipment. All readings shall be provided to the COR and the lowest reading marked on the hull at the bad metal location.

Areas that are accessible but cannot be reached by the automated scanner shall be scanned with a hand-held meter at a resolution of 2” x 2”. Any repair areas found during the hand scan shall be marked on the ship's hull and their approximate positions recorded on the plate drawings and report summary.

3.3.3.1 Any scanning parameter or scope of work changes must be approved by the KO.

3.3.3.2 The echo-to-echo transducer is not authorized due to inconsistent readings and technical difficulties.

3.3.3.3 There must be no deviation from the color scheme specified above.

3.3.4 Ensure that the side scan inspection area includes the Port, Starboard, and Transom exterior shell plate below the water line, but must exclude the following list.

Areas under and within 6-inches of blocks and side blocks (areas that are accessible 6 inches from blocks and…