FRC_COR_Section500_Phase_II_A00004.pdf

USCG Fast Response Cutter (FRC) Solicitation HSCG23-15-R-FRCPII

Part III – List of Documents, Exhibits, and Other Attachments Section J, Attachment 2: Circular Of Requirements (COR)

Section 500 – Auxiliary Systems

PART III, SECTION J, ATTACHMENT 2 500 - 1 Circular of Requirements

TABLE OF CONTENTS

SECTION 500. [RFP] AUXILIARY SYSTEMS

500-1 [RFP] General 500-2 [RFP] Systems

SECTION 502. [RFP] AUXILIARY DIESEL ENGINES

502-1 [RFP] General 502-2 [RFP] Lubricating Oil System 502-3 [RFP] Cooling System 502-4 [RFP] Fuel Oil System 502-5 [RFP] Exhaust System 502-6 [RFP] Starting System 502-7 [RFP] Governors and Trips 502-8 [RFP] Emergency Shutdowns 502-9 [RFP] Guards and Shields 502-10 [RFP] Gauges and Controls 502-11 [RFP] Identification and Marking 502-12 [RFP] Materials 502-13 [RFP] Emissions 502-14 [RFP] Special Tools

SECTION 503. [RFP] PUMPS

503-1 [RFP] General 503-2 [RFP] Pump Seals

SECTION 504. [RFP] INSTRUMENTS AND INSTRUMENT BOARDS

504-1 [RFP] General 504-2 [RFP] Thermometers 504-3 [RFP] Pressure Gauges 504-4 [RFP] Gauge Boards 504-5 [RFP] Test Requirements

SECTION 505. [RFP] GENERAL REQUIREMENTS FOR PIPING SYSTEMS

505-1 [RFP] General 505-2 [RFP] Material 505-3 [RFP] Valves 505-4 [RFP] Vents and Drains 505-5 [RFP] Sealing 505-6 [RFP] Sea Connections

SECTION 506. [RFP] OVERFLOWS, AIR ESCAPES (VENTS), AND SOUNDING

ARRANGEMENTS

506-1 [RFP] General

SECTION 507. [RFP] MACHINERY AND PIPING DESIGNATION AND MARKING

507-1 [RFP] General 507-2 [RFP] Performance Requirements 507-3 [RFP] Standards and Specifications 507-4 [RFP] Materials 507-5 [RFP] Color Coding

SECTION 508. [RFP] GUARDS AND SPRAY SHIELDS

508-1 [RFP] Guards 508-2 [RFP] Spray Shields

PART III, SECTION J, ATTACHMENT 2 500 - 2 Circular of Requirements

SECTION 509. [RFP] THERMAL INSULATION AND ACOUSTIC ABSORPTIVE

TREATMENT FOR DUCTS, TRUNKS AND PIPING

509-1 [RFP] General 509-2 [RFP] Standards and Specifications 509-3 [RFP] Materials 509-4 [RFP] Test Requirements

SECTION 512. [RFP] HEATING, VENTILATION AND AIR CONDITIONING

512-1 [RFP] General 512-2 [RFP] Performance Requirements 512-3 [RFP] Design Requirements 512-4 [RFP] Equipment Requirements 512-5 [RFP] Test Requirements

SECTION 516. [RFP] REFRIGERATION EQUIPMENT

516-1 [RFP] General 516-2 [RFP] Self-Contained Units 516-3 [RFP] Air Conditioning Plant

SECTION 521. [RFP] FIRE MAIN SYSTEMS

521-1 [RFP] General 521-2 [RFP] Fire Pump 521-3 [RFP] Fire Main 521-4 [RFP] Magazine Sprinkling 521-5 [RFP] Compartment Sprinkling (if fitted) 521-6 [RFP] Portable Pumps

SECTION 528. [RFP] PLUMBING AND DECK DRAINS

528-1 [RFP] General 528-2 [RFP] Plumbing and Grey Water Drains 528-3 [RFP] Weather Deck Drains 528-4 [RFP] Traps and Clean Outs 528-5 [RFP] Drip Pans

SECTION 529. [RFP] DRAINAGE SYSTEM

529-1 [RFP] General 529-2 [RFP] Oily Bilge Collecting System 529-3 [RFP] Monitoring, Alarms, and Controls

SECTION 533. [RFP] POTABLE WATER SERVICE SYSTEM

533-1 [RFP] General 533-2 [RFP] Reverse Osmosis (RO) Water Making Apparatus 533-3 [RFP] Storage Tanks 533-4 [RFP] System Components 533-5 [RFP] Filling and Distribution Systems 533-6 [RFP] Disinfection 533-7 [RFP] Chilled Water Systems

SECTION 540. [RFP] LUBRICATION

540-1 [RFP] General 540-2 [RFP] Fittings 540-3 [RFP] Storage Tank 540-4 [RFP] Waste Oil Tank 540-5 [RFP] Fast Lube Oil Change System (FLOCS) 540-6 [RFP] Afloat Stowage

PART III, SECTION J, ATTACHMENT 2 500 - 3 Circular of Requirements

540-7 [RFP] Used Lubricant Handling

SECTION 541. [RFP] FUEL OIL SYSTEM

541-1 [RFP] General 541-2 [RFP] Tank(s) 541-3 [RFP] Fuel Filling and Transfer System 541-4 [RFP] Tank Stripping System 541-5 [RFP] Fuel Oil Priming Pump 541-6 [RFP] At-Sea Refueling System 541-7 [RFP] Cutter Boat Fueling Station

SECTION 551. [RFP] SHIP’S SERVICE COMPRESSED AIR SYSTEM

551-1 [RFP] Definitions 551-2 [RFP] General 551-3 [RFP] Medium Pressure Air Systems

SECTION 555. [RFP] FIRE EXTINGUISHING SYSTEMS

555-1 [RFP] General 555-2 [RFP] Portable Fire Extinguishers 555-3 [RFP] Fixed Heptafluoropropane Total Flooding System 555-4 [RFP] Galley R-102 Fire Fighting System

SECTION 556. [RFP] HYDRAULIC SYSTEMS

556-1 [RFP] General 556-2 [RFP] System Performance and Arrangements 556-3 [RFP] Design Requirements 556-4 [RFP] Piping and Fittings 556-5 [RFP] Components 556-6 [RFP] Hydraulic System Diagrams 556-7 [RFP] Test Requirements 556-8 [RFP] Maintenance

SECTION 561. [RFP] STEERING SYSTEMS

561-1 [RFP] General 561-2 [RFP] Steering Gear 561-3 [RFP] Rudder Position Indicator System 561-4 [RFP] Lubrication 561-5 [RFP] Autopilot 561-6 [RFP] Emergency Steering

SECTION 562. [RFP] RUDDER

562-1 [RFP] Rudder 562-2 [RFP] Rudder Stock 562-3 [RFP] Rudder Construction 562-4 [RFP] Rudder Bearings

SECTION 565. [RFP] ROLL STABILIZATION

565-1 [RFP] Fin Stabilizer System

SECTION 568. [RFP] MANEUVERING THRUSTERS

568-1 [RFP] Requirements

SECTION 573. [RFP] CARGO HANDLING SYSTEM

573-1 [RFP] General 573-2 [RFP] Rigging 573-3 [RFP] Test Requirements

PART III, SECTION J, ATTACHMENT 2 500 - 4 Circular of Requirements

SECTION 581. [RFP] ANCHOR HANDLING AND STOWAGE

581-1 [RFP] General 581-2 [RFP] Performance Requirements 581-3 [RFP] Components 581-4 [RFP] Stowage 581-5 [RFP] Test Requirements

SECTION 582. [RFP] MOORING AND TOWING SYSTEMS

582-1 [RFP] General 582-2 [RFP] Mooring Arrangements 582-3 [RFP] Towing Arrangements 582-4 [RFP] Mooring Lines and Towing Hawsers

SECTION 583. [RFP] BOATS, BOAT HANDLING AND STOWAGE

583-1 [RFP] Small Boat (Cutter Boat) 583-2 [RFP] Cutter Boat Launch and Recovery System – General 583-3 [RFP] Inflatable Liferafts

SECTION 593. [RFP] ENVIRONMENTAL POLLUTION CONTROL SYSTEMS

593-1 [RFP] Vacuum Sewage Collection, Holding, and Transfer System 593-2 [RFP] Grey Water Systems 593-3 [RFP] Solid and industrial waste pollution control systems

PART III, SECTION J, ATTACHMENT 2 500 - 5 Circular of Requirements

SECTION 500. [RFP] AUXILIARY SYSTEMS

500-1 [RFP] General

500-1.1 [RFP] The FRC shall be designed, constructed, certified and classed to the requirements of the ABS HSNC Guide to meet the classification requirements in COR Section 070. Follow-on sections of the COR identify exceptions or additions to the ABS HSNC Guide requirements.

500-1.2 [RFP] The detailed sections that follow provide descriptions of the standards, rules, regulations, and USCG preferred approach for the FRC. The Administrative Contracting Officer will consider for approval alternative approaches, standards, rules and regulations on a case-by-case basis that are equivalent to the approach described, standards, rules and regulations. An alternate approach should only be proposed after due consideration has been given to the USCG preferred approach, standards, rules and regulations and they are found to be unfeasible because of limitations.

500-2 [RFP] Systems 500-2.1 [RFP] The FRC shall include but not be limited to the following auxiliary systems:

500-2.1.1 [RFP] Main and Auxiliary Cooling Systems

500-2.1.2 [RFP] Exhaust Piping and Air Intake System

500-2.1.3 [RFP] Fixed Fire Extinguishing System(s)

500-2.1.4 [RFP] Firemain System

500-2.1.5 [RFP] HVAC System

500-2.1.6 [RFP] Bilge System

500-2.1.7 [RFP] Seawater Service System

500-2.1.8 [RFP] Potable Water System

500-2.1.9 [RFP] Sanitary System (black and grey water)

500-2.1.10 [RFP] Fuel Service and Transfer System

500-2.1.11 [RFP] Lube Oil Service and Transfer System

500-2.1.12 [RFP] Oily Bilge Collecting System

500-2.1.13 [RFP] Interior and Weather Deck Drains

500-2.1.14 [RFP] Hydraulic System(s)

500-2.1.15 [RFP] Steering Gear System

500-2.1.16 [RFP] Vents, Sounds and Overflows

500-2.1.17 [RFP] Roll (Fin) Stabilization System

500-2.1.18 [RFP] Chilled Water System

PART III, SECTION J, ATTACHMENT 2 500 - 6 Circular of Requirements

SECTION 502. [RFP] AUXILIARY DIESEL ENGINES

502-1 [RFP] General

502-1.1 [RFP] The requirements of the ABS HSNC Guide and ABS NVR, as modified by the USCG Appendix, shall apply to auxiliary diesel engines, as appropriate, based upon their power rating.

502-1.2 [RFP] Auxiliary diesel engines that meet the requirements of this Section shall be supplied. Each diesel engine shall be rated at a power and rotational speed as required by the generator. The ship service diesel generator engine rating shall be a continuous rating as defined in ISO 15550. The emergency diesel generator engine rating shall be at the manufacturer’s prime rating.

502-1.2.1 [RFP] The Ship Service Diesel Generator engines shall be the same as those installed in the Phase I FRC. These are Cummins model QSM11-DM diesel engines.

502-1.2.2 [RFP] The Emergency Diesel Generator engine shall be the same as that installed in the Phase I FRC. This is the Cummins model 6BTA5.9-DM diesel engine.

502-1.3 [RFP] Electrical generating diesels shall be capable of operation under the environmental conditions described in COR Section 070. Provisions shall be made for both starting and steady-state operation of prime movers per the COR Section 070 ambient design weather conditions. Minimum engine room starting temperatures, conditions, and mitigating hardware or procedures shall be provided to the Coast Guard in accordance with CDRL 502-001.

502-1.4 [RFP] The rated power shall be attained under the following conditions: 38°C (100°F) if combustion air is ducted directly from outside the engine compartment or 49°C (120°F) if combustion air is drawn from the engine compartment. All other environmental conditions of COR Section 233-1.4 apply.

502-1.5 [RFP] Auxiliary diesel engines shall meet the certification requirements the ABS HSNC Guide and/or NVR. (CDRL 502-002)

502-1.5.1 [RFP] Upon approval of the Contracting Officer, certification may be deferred if the proposed engines are based on a previously certified engine.

502-1.6 [RFP] Any components attached to the engine, or those specified in this Section related to engine function, shall be either furnished by or approved by the engine manufacturer.

502-1.7 [RFP] Each engine shall be equipped with a manually operated barring device to allow for engine rotation for the purposes of setting valves, checking alignment or any other operation requiring manual engine rotation. The device may be permanently attached to the engine or may be bolted in place for use.

502-1.8 [RFP] An air filter change shall be performed on the auxiliary diesel engines after the completion of trials and prior to delivery.

502-2 [RFP] Lubricating Oil System 502-2.1 [RFP] The engine shall be designed for the use of lubricating oil in accordance with the manufacturer’s recommendations.

502-2.2 [RFP] The engine shall be supplied with an integral oil sump.

PART III, SECTION J, ATTACHMENT 2 500 - 7 Circular of Requirements

502-2.3 [RFP] Provisions shall be made on the engine oil sump for measuring and adding lubricating oil to the engine while the engine is operating. A "normal" and "add" or "low" mark shall be shown to indicate normal operation and the need to add oil.

502-2.4 [RFP] The engine shall be equipped with a crankcase ventilation system to dissipate through the engine's intake system all fumes generated by the engine in the crankcase. The system shall pass crankcase vapors through a separation device and shall maintain crankcase pressure within manufacturer’s recommended limits. Oil shall be returned to the sump.

502-2.5 [RFP] A lubricating oil change shall be performed on the auxiliary diesel engines after the completion of trials and prior to delivery.

502-3 [RFP] Cooling System 502-3.1 [RFP] The cooling water system for the ship service diesel engines shall be designed in accordance with the requirements for main diesel engine cooling systems in COR Section 233-5.

502-3.2 [RFP] Jacket water conditioner test kits shall be provided in accordance with COR Section 233-5.4.

502-3.3 [RFP] Jacket water cooler – The ship service diesel engine generator jacket water cooler shall be capable of maintaining jacket water and lubricating oil temperatures within the manufacturers recommended range for standard conditions at all loads up to 115% rated load, when operating with seawater inlet temperatures as required in COR Section 070. Coolers shall be of the removable bundle, floating tube sheet design or of the plate cooler design.

502-3.4 [RFP] The cooling system for the emergency generator diesel engine shall utilize an air cooled radiator for heat rejection.

502-4 [RFP] Fuel Oil System 502-4.1 [RFP] The fuel oil system for the auxiliary diesel engines shall be designed in accordance with the requirements for main diesel engine fuel systems in COR Section 233-6.

502-4.2 [RFP] The fuel oil system for the emergency generator diesel engine shall be a gravity feed day tank with a minimum capacity as required in COR Section 541- 2.4.

502-5 [RFP] Exhaust System 502-5.1 [RFP] The exhaust system for the ship service diesel generator engines shall be designed in accordance with the requirements for main diesel exhaust system in COR Section 233-7.

502-5.2 [RFP] The exhaust system for the emergency generator diesel engine shall be designed in accordance with COR Section 259.

502-6 [RFP] Starting System 502-6.1 [RFP] The starting system for the auxiliary diesel engines shall be designed in accordance with the requirements for main diesel engine starting system in COR Section 233-8.

PART III, SECTION J, ATTACHMENT 2 500 - 8 Circular of Requirements

502-7 [RFP] Governors and Trips

502-7.1 [RFP] The diesel engine governor shall meet the requirements of COR Section 233-9.

502-7.2 [RFP] The engine shall be equipped with an automatic trip on loss of lube oil pressure.

502-8 [RFP] Emergency Shutdowns 502-8.1 [RFP] Each engine shall be provided with an emergency shutdown device that complies with COR Section 233-10.

502-9 [RFP] Guards and Shields 502-9.1 [RFP] Flange shielding shall be provided on fuel and lube oil lines and filters.

502-9.2 [RFP] Shields and guards for auxiliary diesel engines shall comply with COR Section 233-11.

502-10 [RFP] Gauges and Controls 502-10.1 [RFP] Fuel oil pressure (after fuel filter) indication shall also be provided for the auxiliary engines.

502-10.2 [RFP] Local controls for starting, stopping, and speed regulation shall be mounted on the instrument panel. The instrument panel shall also contain controls for manually starting and stopping the keep-warm and pre-lube oil systems. No two compartment-wide visual alarms (i.e. strobe lights) for different systems in the same compartment may have the same light lens color.

502-10.3 [RFP] The following alarms (for each generator set) shall be provided on the Pilothouse helm console:

502-10.3.1 [RFP] Low Lubricating Oil Pressure

502-10.3.2 [RFP] High Jacket Water Temperature

502-10.4 [RFP] The design and arrangement of controls, displays and alarms shall comply with ASTM F1166.

502-11 [RFP] Identification and Marking 502-11.1 [RFP] Auxiliary diesel engine identification and marking shall meet the requirements of COR Section 233-13.

502-12 [RFP] Materials 502-12.1 [RFP] Magnesium alloys shall not be used. Aluminum parts shall be protected from chemical and electrolytic action.

502-13 [RFP] Emissions 502-13.1 [RFP] Engines shall be certified by the manufacturer to meet the emissions and reporting requirements of COR Section 233-3. (CDRL 233-002)

502-14 [RFP] Special Tools 502-14.1 [RFP] One set of special tools shall be delivered to each FRC for each engine model installed. Each set provided shall include the required or recommended special tools for minor repairs, adjustments, maintenance, and engine overhauls.

502-14.1.1 [RFP] Special tool sets shall not include general tools.

PART III, SECTION J, ATTACHMENT 2 500 - 9 Circular of Requirements

502-14.2 [RFP] If an electronic control and alarm system is provided that uses a computer and software for troubleshooting and maintenance, all software required for engine maintenance shall be provided along with all required connection cables, interfaces, and power cables required.

502-14.2.1 [RFP] The Coast Guard certified ruggedized laptop is currently the Panasonic CF-31 Toughbook. If any of the software provided is not compatible with the Coast Guard certified ruggedized laptop computer, a commercially available laptop as rugged as the Panasonic model and compatible with all of the engine maintenance software shall be provided.

502-14.2.2 [RFP] A non-expiring or no-cost renewable license for the software shall be provided.

502-14.2.3 [RFP] A water resistant, crushproof, and dust resistant case with an o-ring seal, closed cell foam interior and automatic pressure equalization valve shall be provided. The case shall be sized to fit the provided ruggedized laptop and all required connection cables, interfaces, and power cables provided to meet the requirement in COR Section 233-16.2. The case shall have a minimum NEMA enclosure rating of IP54. The Coast Guard currently uses cases manufactured by Pelican Products, Inc. for this purpose.

PART III, SECTION J, ATTACHMENT 2 500 - 10 Circular of Requirements

SECTION 503. [RFP] PUMPS

503-1 [RFP] General

503-1.1 [RFP] Each pumping system shall be analyzed (CDRL 085-510) to determine suitability of the pumps selected. The analysis shall include as a minimum: pump head, flow, and NPSH calculations with the pump curves and system curves.

Pumps selected shall be operating in the system under normal conditions at or near the maximum efficiency point on the head capacity curve. The pumps shall have non-overloading power characteristics. Motor ratings shall be at least equal to maximum power requirements of the pump over its operating range. Data derived from the analysis shall be included in the associated system diagram.

The Contractor shall verify that each pump's performance characteristics are suitable for the intended service and compatible with the hydraulic characteristics of the system served.

503-1.2 [RFP] Suction and discharge connections 38mm (1-1/2 in) and larger shall be flanged, and shall conform to ASME B16.24 or B16.5, as appropriate. Pumps shall be readily removable for easy access to shaft seals and items requiring maintenance or adjustment.

503-1.3 [RFP] Flexible or rigid couplings may be used for horizontal or vertical units.

Vertical units fitted with rigid couplings shall be designed so that the thrust load of the rotating group is carried in the driver by suitable thrust bearings.

503-1.4 [RFP] Unless otherwise specified, pumps shall have a discharge pressure gauge and a valved connection for temporary installation of a suction gauge.

503-1.5 [RFP] Pumps that will operate at shut off or during very low flow service condition shall have means for re-circulation or be provided with a continuous bleed line or internal case drain leakage to prevent overheating of the pump and fluid.

503-1.6 [RFP] The material and the material specification of each pump component shall be specified on the pump's assembly drawing.

503-1.7 [RFP] Where pumps are lubricated with the pumped fluid, wearing parts shall be of a design and material which permits safe dry operation for short periods.

503-1.7.1 [RFP] Materials with low elongation percentage (i.e. cast iron) are prohibited.

503-1.8 [RFP] Location of pumps, together with piping design and arrangement, shall provide the highest practicable net positive suction head available for the pumps.

For centrifugal pumps and other services located where they do not have a submerged suction, a priming pump unit shall be furnished with the pump, or a separate vacuum priming pump shall be installed.

503-1.9 [RFP] Seawater pumps – Internal parts of seawater pumps shall be non-corrosive materials.

503-1.9.1 [RFP] Any composite materials for components shall be in accordance with NAVSEA DWG 803-7226047 and NAVSEA Technical Publication 03Y3-101 Composite Material Replacement Components for Centrifugal Pumps.

503-1.10 [RFP] Centrifugal Pumps:

503-1.10.1 [RFP] Centrifugal pumps, except the potable water pressure set, shall be designed and built in accordance with ASTM Standard F998.

PART III, SECTION J, ATTACHMENT 2 500 - 11 Circular of Requirements

503-1.10.2 [RFP] Where centrifugal pumps of different capacities are required to operate in parallel or take suction from different sources and discharge into a common line, their characteristics shall allow each pump to carry its share of the load.

503-1.10.3 [RFP] Fire pumps and bilge pumps shall have constantly rising head capacity characteristic curves. Each pump shall have a characteristic curve such that at constant rated speed, the total head at shut off is not less than 10% and not more than 20% above total head at rated capacity.

503-1.10.4 [RFP] Centrifugal pumps operating at or near shut off shall be fitted with bleed lines.

503-1.10.5 [RFP] Centrifugal pumps shall be provided with casing vents to remove air and drains to remove fluids.

503-1.11 [RFP] Positive Displacement Pumps:

503-1.11.1 [RFP] Positive displacement pumps shall be the manufacturer's standard commercial marine model, built in accordance with Standards for Centrifugal, Rotary, and Reciprocating Pumps of the Hydraulic Institute. Positive displacement pumps for fuel oil service shall meet the requirements of ASTM F1718.

503-1.11.2 [RFP] Leakage troughs shall be provided with screwed plugs arranged to permit draining into a hand carried container capable of holding the entire contents of the trough. Troughs are to be installed around pumps that handle oil.

503-1.11.3 [RFP] Relief valves shall be furnished for positive displacement pump discharges and shall be located so as to protect both pump and system. The discharge off the relief valve shall be directed back to the suction side of the pump.

503-1.11.4 [RFP] Materials of construction for the positive displacement pumps, excluding the fuel oil pumps, shall be as shown in Table 503-1.

Table 503-1

[RFP]

PART MATERIAL

Casing Steel or ductile iron

Rotors Steel, bronze

Shafts 304 or 316 CRES

Glands Steel

Nuts Brass

Bushings Bronze

503-1.11.5 [RFP] Special tools and equipment shall be provided as required for the inspection, maintenance, and repair of each pump. These shall include non-commercial tools, wrenches, packing hooks, babbitting fixtures, bearing pullers, and similar items.

PART III, SECTION J, ATTACHMENT 2 500 - 12 Circular of Requirements

503-2 [RFP] Pump Seals

503-2.1 [RFP] All pumps – Pumps shall be fitted with mechanical seals. Mechanical Seals shall be furnished in accordance with ASTM F1511-06, except for the potable water pressure set. Mechanical shaft seals shall not be fitted with set screws. Seals shall be retained on stubs or steps. Positive pressure shall be supplied to seal faces at all times. Seal mating ring face, if installed, shall be ceramic material. Seal ring face shall be carbon graphite material. Seals shall be protected from or unaffected by dry running and damaging materials in the pumped fluid. Where circulation of liquid at seal face is required, a root valve shall be installed at the source where liquid is piped to a mechanical seal. Shaft seal condition of in service pumps shall be determined by visual inspection.

Failure of a seal shall not cause failure of the driver.

503-2.2 [RFP] Seawater pumps – Internal parts of seawater pumps shall be non-corrosive materials.

503-2.3 [RFP] Fire pumps – Fire pumps shall have tungsten carbide seal ring face material. A packing gland for emergency packing shall be fitted to each seal.

This emergency packing shall be brought into service in the event of a primary seal failure. Installation of the emergency packing shall be in accordance with the pump manufacturer's recommendations. Emergency packing seal is not required if the service life of the primary seal exceeds 10,000 hours operating life.

503-2.4 [RFP] Pumps handling sewage and turbid (black/gray) water shall have double mechanical seals with spring-pressurized sealing oil chambers. Pumps handling gray water shall also have drip pans installed to contain any possible leakage from the pump seals.

PART III, SECTION J, ATTACHMENT 2 500 - 13 Circular of Requirements

SECTION 504. [RFP] INSTRUMENTS AND INSTRUMENT BOARDS

504-1 [RFP] General

504-1.1 [RFP] Gauges, thermometers, indicators, and other instruments for machinery, pumps, piping, and mechanical systems shall be installed to ensure safe and proper operation and monitoring of equipment.

504-1.2 [RFP] Unless otherwise specified, the requirements in this Section do apply to equipment built or tailored specifically for FRC application. They do not apply to instruments and instrument boards supplied with and mounted on equipment packages.

504-1.3 [RFP] Electrical analog indicating instruments shall meet the requirements of

ANSI C39.1.

504-1.4 [RFP] Each instrument on the FRC shall have a label plate which specifies the service of the instrument. Each analog instrument shall have color bands displayed on the face showing safe operating range in green and unsafe operating range in red. Calibration data will be displayed on the instrument.

504-1.5 [RFP] Instruments shall be accessible and readable, mounted on gauge boards at eye-level, and shall not be installed where the ambient temperature exceeds 63°C (145°F), where vibration or other environmental conditions exceed the instrument design limits, or where they are prone to accidental breakage.

Instruments that are required to be in the weather or harsh environment shall be designated for such service.

504-1.6 [RFP] Failure of any instrument shall not cause the system or machinery to be inoperable. The instruments accuracy shall be adequate for operating or maintaining the systems or machinery. Calibration of instruments shall not require system shutdown.

504-1.7 [RFP] Gauge face diameters for tachometers and synchronizers shall be larger than 75mm (3 in). All other gauge faces shall have diameters larger than 50mm (2 in).

504-1.8 [RFP] All instruments in the pilothouse shall be backlit with variable intensity lighting that does not impair night vision or night vision apparatus, and shall be provided with dimmer units that vary continuously from zero to full intensity.

Instrument bezels in all locations shall be non-glare and shall be oriented such that instrument lights are not reflected in pilothouse windows.

504-1.9 [RFP] The design and layout of all controls, displays, alarms and the integration therein shall comply with ASTM F1166.

504-2 [RFP] Thermometers 504-2.1 [RFP] Thermometers shall be between 75mm (3 in) and 127mm (5 in) dial size.

Thermometers shall meet the requirements of MIL-I-17244E Amend 5.

504-2.2 [RFP] Thermometers shall be of the dial type and direct or remote reading.

504-2.3 [RFP] Thermometers shall provide the maximum system operating temperature at approximately 75% full scale range, as well as system operating temperature in the middle third of the scale range.

PART III, SECTION J, ATTACHMENT 2 500 - 14 Circular of Requirements

504-2.4 [RFP] Remote reading thermometers shall be installed where specified and wherever an arrangement prevents a direct reading type from being accessible for reading, maintenance, and replacement.

504-2.5 [RFP] Thermometers shall be installed to be read vertically. At the optimum operating temperature, the indicating pointer shall point directly upward.

504-3 [RFP] Pressure Gauges 504-3.1 [RFP] Pressure gauges shall comply with the requirements of ASME B40.100.

504-3.2 [RFP] Gauge displays shall show US Customary measurements. If metric values are also shown, then the metric scale shall be contrasting in color to the US Customary measure value.

504-3.3 [RFP] Pressure gauges shall be installed to be read vertically. At the optimum operating pressure, the indicating pointer shall point directly upward.

504-3.4 [RFP] Pressure gauges shall provide the maximum system operating pressure at approximately 60% of the full scale range.

504-3.5 [RFP] Gauges shall be fitted with root valves located on the equipment or pipe from which the measurement is being made. Gauges and instrumentation piping installation shall be fitted with cut-out valves or other devices to permit gauge isolation and removal without shutting down the piping system.

504-3.6 [RFP] Pressure gauges shall be provided for each displacement pump.

504-3.7 [RFP] Liquid filled gauges or gauges with a "pressure snubber," to absorb shocks and pulsations, shall be installed on the discharge gauge of each positive displacement pump. Dampening devices to prevent damage from vibration shall be provided on all gauges.

504-3.8 [RFP] A fitting shall be installed downstream of pressure-sensing line root valve for insertion of test gauge to prevent removal of permanent gauge.

504-3.9 [RFP] Gauges shall be isolated from corrosive fluids.

504-4 [RFP] Gauge Boards 504-4.1 [RFP] Gauge boards shall be installed wherever instruments can be consolidated.

504-4.2 [RFP] Instruments and indicators on gauge boards shall be clearly labeled and logically grouped or organized to correlate to equipment location or physical operation.

504-4.3 [RFP] Gauge boards with electric devices shall be installed with drip-proof protection in accordance with NEMA 250, Type 12. Cable and pipe penetrations in gauge or gauge boards shall be sealed. Flammable fluids shall not be piped into these enclosures.

504-4.4 [RFP] Dial-type gauges and instruments on gauge boards shall be flush mounted.

504-4.5 [RFP] The interface component material, type of joint, and connections to the piping or pressure vessel shall be similar to and compatible with system materials.

PART III, SECTION J, ATTACHMENT 2 500 - 15 Circular of Requirements

504-4.6 [RFP] Gauge boards shall be constructed of steel or aluminum for interior locations and CRES for exterior locations. Steel gauge boards shall meet the preservation requirements of COR Section 631.

504-4.7 [RFP] Instruments and instrument boards located on equipment shall be mounted so that vibrations are not transmitted to the instruments.

504-5 [RFP] Test Requirements 504-5.1 [RFP] Instruments shall be factory calibrated prior to shipment. Instrument calibration(s) shall be traceable to the National Institute of Standards and Technology. Instruments subject to damage during flushing or hydrostatic testing shall be removed or protected during these evolutions.

504-5.2 [RFP] The date of the calibration and the initials of the individual who conducted the calibration shall be clearly marked on each gauge. An electronic log with capability of printing to paper log shall be provided with a list of each gauge, the date of its calibration, and the name of the individual who performed the calibration. (CDRL 085-507) All calibrations shall be current for a minimum of 9 months after delivery.

PART III, SECTION J, ATTACHMENT 2 500 - 16 Circular of Requirements

SECTION 505. [RFP] GENERAL REQUIREMENTS FOR PIPING SYSTEMS

505-1 [RFP] General

505-1.1 [RFP] Piping systems shall be designed to comply with the following drawings:

505-1.1.1 [RFP] 154R-WPC-251-001 Rev “-“ Combustion Air Diagram.

505-1.1.2 [RFP] 154R-WPC-256-301 Rev “-“ Main and Auxiliary Cooling System Diagram.

505-1.1.3 [RFP] 154R-WPC-259-001 Rev “-“ Exhaust System Diagram.

505-1.1.4 [RFP] 154R-WPC-506-301 Rev “-“ Fills, Vents, Sounds and Overflows Diagram.

505-1.1.5 [RFP] 154R-WPC-513-301 Rev “-“ Machinery Ventilation Diagram.

505-1.1.6 [RFP] 154R-WPC-521-301 Rev “-“ Firemain System and Magazine Sprinkler Diagram.

505-1.1.7 [RFP] 154R-WPC-526-301 Rev “-“ Weather Deck Drain Diagram.

505-1.1.8 [RFP] 154R-WPC-528-301 Rev “-“ Grey Water System Diagram.

505-1.1.9 [RFP] 154R-WPC-529-301 Rev “-“ Bilge System Diagram.

505-1.1.10 [RFP] 154R-WPC-533-301 Rev “-“ Potable Water System Diagram (except that piping, valves, takedown joints, and fittings shall be lead-free meeting the requirements of Section 1417 of the Safe Drinking Water Act (42 USC 300g- 6); Prohibition on Use of Lead Pipes, Solder, and Flux.)

505-1.1.11 [RFP] 154R-WPC-540-301 Rev “-“ Lube Oil Service and Transfer System Diagram.

505-1.1.12 [RFP] 154R-WPC-541-301 Rev “-“ Fuel Oil Service and Transfer System Diagram.

505-1.1.13 [RFP] 154R-WPC-551-301 Rev “-“ Compressed Air System Diagram.

505-1.1.14 [RFP] 154R-WPC-555-301 Rev “-“ Fixed Fire Extinguishing System Diagram.

505-1.1.15 [RFP] 154R-WPC-556-301 Rev “-“ Cutter Boat Launch and Recovery Hydraulic System Diagram.

505-1.1.16 [RFP] 154R-WPC-556-302 Rev “-“ Fin Stabilizer Hydraulic System Diagram.

505-1.1.17 [RFP] 154R-WPC-556-303 Rev “-“ Steering System Hydraulic Diagram.

505-1.1.18 [RFP] 154R-WPC-593-301 Rev “-“ Sewage System Diagram.

505-1.1.19 [RFP] 154R-WPC-593-302 Rev “-“ Oily Bilge System Diagram.

505-1.2 [RFP] Piping shall not be installed in way of work areas and walkways or where it may be subject to damage. Piping shall be run as directly as possible with a minimum of bends or joints. Piping shall be supported to prevent vibration. Pipe hangers, pipe penetrations, etc., shall meet the material requirements of COR Section 078.

505-1.3 [RFP] The damage control requirements of NSTM S9086-CN-020/CH-079 Volume 2 Section 24 shall be met.

PART III, SECTION J, ATTACHMENT 2 500 - 17 Circular of Requirements

505-1.4 [RFP] Welded and brazed connections shall comply with COR Section 074.

Silver brazed fittings shall be of the pre-inserted ring type, except in sizes ½ in NPS and below, in the refrigeration systems and systems which utilize K type copper tubing.

505-1.5 [RFP] Breakdown flanges, pipe unions or other suitable means shall be fitted for equipment removals. Inspections and maintenance shall not require removal of piping.

505-1.6 [RFP] Duplex sea strainers shall be installed in all system piping that take suction from the sea. Sea chest or sea cock strainers shall also be installed.

Isolation valves shall be installed to permit removal of strainer baskets without shutting down associated systems. The seawater supply line to each engine shall be fitted with an isolation valve allowing the engine seawater system to be isolated from the other to repair casualties and complete maintenance actions while the other engine is in operation. The strainers shall be designed so that materials stopped by the strainer can be removed easily by removing and emptying the strainer baskets.

505-1.7 [RFP] Directional changes in all pressurized piping systems shall be made by bending the piping wherever feasible. Otherwise, directional changes shall be made using fittings such as elbows, tees, and butt weld fittings applied in accordance with the pipe manufacturer’s requirements. Directional changes in copper tubing may be made by bending the tubing.

505-1.8 [RFP] Bend radii shall be not less than the minimum recommended by the tube manufacturer for that tube size. Directional changes in non-pressurized vents and overflows may be mitered. Where mitered joints are used, each joint shall produce a maximum directional change of no more than 45°. Where mitered joints are used, they shall not be made to trap any fluids but must be arranged to drain to the lowest point in the system.

505-1.9 [RFP] Piping shall be properly supported with hangers. Hangers shall not clamp on hose. If hangers are required to support hose assemblies dogleg fitting shall be used. Hose may not pass through stuffing tubes in watertight boundaries. All penetrations shall maintain the degree of tightness of the structure penetrated.

505-1.10 [RFP] Calculation shall be provided for expansion, support and flexibility of piping systems. (CDRL 085-510) Piping hangers and piping arrangements shall permit piping expansion and contraction without inducing abnormal stress concentrations.

505-1.11 [RFP] The design and installation of rigid pipe hangers shall be in accordance with ASTM F708-92.

505-1.12 [RFP] The materials, design and manufacture of pipe hangers and supports shall be in accordance with MSS SP 58.

505-1.13 [RFP] Connections between sections of pipe in piping systems shall be made using fittings such as couplings, unions, tees, flanged joints, butt welded fittings, butt welding, or hose connections (where not prohibited by ABS HSNC). Metallic piping for system pressures above 690 kPa (100 psi) shall have silver brazed or welded fittings. Connections of tube to components with pipe thread connections shall be by means of adapters or approved swage-type compression fittings or 37° JIC flare fittings. Flare-type tube connectors shall not be used in systems carrying flammable fluids.

PART III, SECTION J, ATTACHMENT 2 500 - 18 Circular of Requirements

505-1.14 [RFP] Threaded connections in aluminum are prohibited, unless reviewed and approved for the specific application by the Contracting Officer.

505-1.15 [RFP] All joints in piping systems shall be properly aligned so that stress or distortion will not exist in or between the connected parts.

505-1.16 [RFP] Flexible connectors (in compliance with the HSNC Guide) shall be installed for vibration isolation between piping and machinery.

505-1.17 [RFP] Flexible connections shall not be installed in piping systems to correct misalignments.

505-1.18 [RFP] Swing-check valves shall not be installed in an athwartship direction.

505-1.19 [RFP] Maximum velocity limits shall be in accordance with SNAME Text “Marine Engineering”, Chapter 20, Table 3 except for hydraulics (See COR Section 556-

2) and seawater (See COR Section 256). The maximum velocity limits shall not exceed 4.6 m/sec (15 ft/sec) for fuel transfer systems, and 7.6 m/sec (25 ft/sec) for fuel loading and off-loading conditions.

505-1.20 [RFP] Pressure vessels shall also meet the requirements of the ASME Boiler and Pressure Vessel Code.

505-1.21 [RFP] Piping diagrams and arrangement drawings shall be furnished in accordance with GEN SPECS 505h1. NAVSEA drawing 803-5001049, and ASTM F1000 provide the list of piping symbols that are to be used. (CDRL 085-

500, CDRL 085-501)

505-1.22 [RFP] Equipment and system isolation, and damage control requirements shall be in accordance with GEN SPEC 505b5.

505-2 [RFP] Material 505-2.1 [RFP] Pipe

505-2.1.1 [RFP] Except as specified elsewhere in the COR, materials for piping systems shall be suitable for the service intended. Alloy parts containing copper shall not be used in aluminum piping systems. The use of copper bearing alloy parts in piping in proximity to aluminum shall be limited to the maximum extent practicable.

505-2.1.2 [RFP] Piping material selection shall comply with MIL-STD-777E, Change Notice 7 except as noted below:

505-2.1.2.1 [RFP] For shower drains within the shower drain pans, refer to COR Section 528-2.4.

505-2.1.2.2 [RFP] For air escape/vent pipe, refer to COR Section 506-1.1.1

505-2.1.2.3 [RFP] For lubricating oil piping, refer to COR Section 540-1.1

505-2.1.2.4 [RFP] For fuel oil piping, refer to COR Section 541-1.8. CRES is allowed for fuel systems in accordance with the ABS HSNC Guide.

505-2.1.2.5 [RFP] For Category G-3 – Hydraulic Oil, other than steam catapult, Maximum system pressure 3,000 lb/in2, in addition to the materials indicated, ASTM A213 TP304L or TP316L or ASTM A-249 TP304L or TP316L tubing sized in accordance with regulatory requirements is allowed.

PART III, SECTION J, ATTACHMENT 2 500 - 19 Circular of Requirements

505-2.1.2.6 [RFP] Spaces protected by Heptafluoropropane shall have fire-hardened fittings that meet the requirements of MIL-STD-777E, Section 4.14.1, for CO2 and Halon systems.

505-2.1.2.7 [RFP] Potable water piping and fittings shall comply with ASTM F1155 Table 8. Potable water systems shall be fabricated of Type K or L Copper tubing meeting ASTM B88. Potable water system design, component selection, installation and testing shall comply with 46 CFR Part 56, except that takedown joints, fittings, and valves shall be lead-free, meeting the requirements of Section 1417 of the Safe Drinking Water Act (42 USC 300g-6); Prohibition on Use of Lead Pipes, Solder, and Flux.

505-2.1.3 [RFP] PVC or CPVC piping or components shall not be used in any piping systems.

505-2.1.4 [RFP] A quality control, fabrication, and installation procedure shall be prepared and delivered (CDRL 505-001) for the installation of any FRP pipe and shall be based on the manufacturer’s recommendations.

505-2.1.5 [RFP] FRP pipe shall not be installed outboard of a hull cut-out valve.

505-2.1.6 [RFP] Fittings – Fitting material selection shall comply with MIL-STD-777E, Change Notice 7 except that commercial fittings are allowed. Fittings on aluminum pipe shall be aluminum. Fittings for potable water systems shall be selected, installed, and tested in accordance with 46 CFR Part 56, except that takedown joints and fittings shall be lead-free meeting the requirements of Section 1417 of the Safe Drinking Water Act (42 USC 300g-6); Prohibition on Use of Lead Pipes, Solder, and Flux. Fitting on copper nickel pipe shall be bronze or butt welded copper nickel. Fittings on CRES pipe shall be CRES of the same grade as the CRES pipe. Threaded fittings shall be selected to limit the potential for galling. Fittings on FRP pipe shall be FRP.

Brass fittings shall not be used in seawater piping systems. Material for all valves and fittings shall be compatible, in regards to electrolysis, with the 90/10 CuNi piping. [RFP] Mechanically attached fittings shall be in accordance with NSTM Chapter 505, paragraph 6.8.

505-2.1.7 [RFP] Belled end connections shall be in accordance with MSS-SP-119.

505-2.2 [RFP] Hoses and Flexible Piping Devices

505-2.2.1 [RFP] Flexible piping devices shall be in accordance with 46 CFR 56.35, 56.60-25 or the ABS HSNC Guide. Crimp type hose end fittings are preferred, but reusable hose end fittings are acceptable. All hose shall be in accordance with Society of Automotive Engineers (SAE) J1942 except as noted otherwise in this COR.

505-2.2.2 [RFP] Hoses shall not be run in vicinity of hot engine areas such as turbochargers or exhaust.

505-2.2.3 [RFP] For non-flammable low pressure (345 kPa (50 psi) or below) and gravity service applications slip-on fittings may be appropriate. Where hose is connected by slipping it over the end of tubing or pipe, the cut end of the tubing or pipe shall be chamfered to prevent it from cutting or chafing the hose. Hose shall not be fitted over threaded pipe. Proper hose end fitting shall be used. Where hose clamps are used they shall be all-CRES screw type hose clamps. Each connection shall have two clamps.

PART III, SECTION J, ATTACHMENT 2 500 - 20 Circular of Requirements

505-2.2.4 [RFP] Hose used in the black and grey water systems shall be non-permeable, smooth bore and capable of sustaining external pressure due to the vacuum system without collapsing.

505-2.2.5 [RFP] Flexible hose 102mm (4 in) and smaller shall not exceed 762mm (30

in) in length unless required for flexibility. Larger hoses shall not exceed 1016mm (40 in) in length.

505-2.2.6 [RFP] On machinery where low frequency resilient mounts are installed to meet space noise level criteria, multiple-leg flexible hose assemblies, shall be utilized as flexible piping connections between the machinery and the ship for noise attenuation purposes. Monel fittings are not required. Single-leg flexible hose assemblies are permissible for machinery isolated with Distributed Isolation Material (DIM). Single leg flexible hose assemblies are also permissible between the Jacket Water Heater and the SSDG providing the hose excursions are such that equipment movement will not damage or disengage the hose fittings during operation. MIL SPEC hoses and Navy replacement policies do not apply.

505-2.2.6.1 [RFP] The Main Diesel Engine (MDE) sea water inlet and outlet connections shall use rubber bellows in accordance with MTU Friedrichshafen GMBH Drawing 0002034983 Rev (0) Revision Notice No.

22913 dtd 21.06.2006, RUBBER BELLOWS (GUMMIKOMPENSATOR).

505-2.2.7 [RFP] The tagging and electronic log of hoses in piping systems shall comply with COMDTINST M9000.6F, Chapter 505. (CDRL 085-502)

505-2.2.8 [RFP] Hose assemblies shall comply with SAE J1273.

505-3 [RFP] Valves 505-3.1 [RFP] Valve selection shall comply with MIL-STD-777E, Change Notice 7 except that commercial valves are allowed. The use of commercial valves does not remove the requirement for material selection/construction as required in MIL- STD-777E, Change Notice 7. Valves shall be suitable for the intended application and shall be located where they are readily accessible in accordance with COR Section 071 for inspection, operation, maintenance, and removal for repair. Valves for emergency service shall be installed so that they are immediately accessible. Valves shall be compatible with the intended service and the material requirements of COR Section 505-2. Valves that may be installed in locations which are not readily accessible shall be fitted with long-stem or extension handles, or other means, to permit remote operation.

Extensions passing through watertight boundaries shall be fitted with watertight stuffing tubes. Valves shall be of a type that indicate if they are open or closed by handle position. Remote reach rod extension shall not have more than 1 fixed bend from the valve to the handle on the reach rod. Valves for potable water systems shall be selected, installed, and tested in accordance with 46 CFR Part 56, except that valves shall be lead-free meeting the requirements of Section 1417 of the Safe Drinking Water Act (42 USC 300g-6); Prohibition on Use of Lead Pipes, Solder, and Flux.

505-3.1.1 [RFP] Valves with bronze trim shall be galvanically isolated from aluminum piping. This requires a flanged connection with a nonconcuctive gasket, and bolts with nonconductive inserts and washers. Alternately, a nonconductive patent coupling (such as a Dresser coupling) may be employed.

PART III, SECTION J, ATTACHMENT 2 500 - 21 Circular of Requirements

505-3.2 [RFP] Gate valves shall be used for overboard connections in bilge and sewage systems. Lugged butterfly valves are permitted in the firemain, seawater cooling, and potable water systems overboard connections.

505-3.3 [RFP] Globe valves shall be used for limiting rate of flow. Globe valves shall have renewable discs and seats.

505-3.4 [RFP] Ball valves shall have an indicator of the valve’s position. Fuel tank shutoff valves shall be capable of operation both locally and from a position outside the compartment in which they are located.

505-3.5 [RFP] Valves employing resilient material must continue to provide effective closure of the line without appreciable leakage if the resilient material is damaged or destroyed as defined by 46 CFR 56.

505-3.6 [RFP] Pressure relief valves shall be installed, where necessary, to protect piping systems, machinery, and equipment from damage due to excessive pressure under all operating conditions. Such conditions include normal, emergency, improper operation, or malfunction of systems or equipment. Relief and safety valves shall be selected and set in accordance with MS-18282 and MS-18283. Relief valve discharges for seawater system shall be directed overboard. Relief valve discharges shall be directed so as not to present an environmental or personnel hazard. Refrigerant relief valve discharges shall be piped to the weather deck.

505-3.7 [RFP] FRP valves are not permitted in shell penetrations in accordance with

ABS HSNC, 4-3.6-2/9.13 & 4-6-3/7.9

505-3.8 [RFP] The placement of valve locking devices shall comply with ASTM F993.

505-3.9 [RFP] Flange bolting shall be in accordance with ASTM F704 and ASTM F1166 for ease of operation.

505-4 [RFP] Vents and Drains 505-4.1 [RFP] Bronze or CRES lever-handle draincocks shall be installed at low points in all piping systems that may entrap water, including components and parts of equipment. Components and parts not provided with drains shall be fitted with draincocks. Water shall drain down to the point where the cock is connected to the piping or the component. All drains shall be readily accessible as installed, or fitted with extensions if necessary to provide accessibility.

505-4.2 [RFP] All piping systems and components shall be free of air pockets that prevent the proper operation of the system or component. Where air pockets are unavoidable or where air entrapment due to turbulence or component construction may result in the system becoming air locked, petcocks shall be installed as necessary to bleed the systems or components. Valves necessary for purging shall be mounted on the component requiring purging and shall discharge into the space where located. Lever-handle petcocks shall be installed where necessary as vents to break any vacuum that might prevent complete water drainage from any part of piping systems.

505-5 [RFP] Sealing 505-5.1 [RFP] Sealing compound or thread sealant tape shall be compatible with the material, fluid, and service for which it is intended. Teflon™ tape shall be applied to all threaded joints in potable water fill, storage, and distribution systems.

Teflon™ tape shall not be used to seal threaded joints in the hydraulic system.

PART III, SECTION J, ATTACHMENT 2 500 - 22 Circular of Requirements

505-6 [RFP] Sea Connections

505-6.1 [RFP] Piping connections that penetrate the hull, except engine exhaust shall be fitted with an isolation valve. The valves shall be located directly on the shell or connected to the shell by pipe with strength equivalent to that of the hull. The pipe shall be no longer than what is required to connect the valve, clear any shell insulation, and provide for space to turn the handle. Longer extensions may be specifically approved if required to improve operating access by crew. Pipe longer than six nominal diameters shall be provided with reinforcing brackets to other support for the inboard end of the pipe. Valves over 1-1/2 in shall be flanged. Fittings, nipples, nozzles, etc., connecting the valve to the hull shall be of CRES and shall be welded. Threaded connections between the hull and the valve shall not be used except where threads are not exposed to seawater.

505-6.1.1 [RFP] Seawater relief valve discharges that penetrate the hull shall have their isolation valves capable of being locked in the open position.

505-6.2 [RFP] The sea chest shall be fabricated from the same material as the hull.

Discharge piping shall be fabricated from the same material as the hull or 316L CRES. Sea chest grates may be fabricated out of Ultra High Molecular Weight Polyethylene (UHMW-PE), such as Ultra–Poly.