Attachment No. 1 Statement of work (SOW).pdf

23-Jan-2026

Statement of Work (SOW)

HIGH PRESSURE WATERJET BOILER CLEANING UNIT, X41

1. General

a. The contractor shall design and provide a High Pressure Waterjet Boiler Cleaning Unit

(hereinafter referred to as “the equipment”) to X-41 Boiler Shop at Bldg. 1922, Ship Repair

Facility and Japan Regional Maintenance Center (SRF-JRMC), US Naval Base Yokosuka.

b. The equipment shall be used for onboard cleaning of boiler by waterjet. A built-in mixing system to create sodium nitrite water solution is required.

c. Unless otherwise specified herein, the contractor shall furnish all labor, materials, equipment, and transportation.

d. The contractor shall have a local Japanese dealer network that provides maintenance services and repair parts.

e. General Safety

All machine parts, components, mechanisms, and assemblies furnished on the unit shall comply with all specific requirements of “OSHA Safety and Health Standard (29CFR1910), General Industry. (Reference (a), (b)). After January 2, 1990, whenever replacement or major repair, renovation or modification of a machine or equipment is performed, and whenever new machines or equipment are installed, energy isolating devices for such machine or equipment shall be designed to accept a lockout device. (Reference (b))

f. Any asbestos containing material, toxic metal including Lead, Hexavalent chromium, Cadmium, and PCB shall not be used on the machine or parts, insulation, cable, other related materials.

g. Order of Precedence

In the event of a conflict between the text of this document and the references or enclosures cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

h. Utilities that are connected to the equipment

(1) Electric power, 480V, 3P3W, 60 Hz

(2) Compressed air, 100 psig

2. Reference

The contractor shall refer to the following references to accomplish the work herein.

(a) 29 CFR 1910.212 – Occupational Safety and Health Standards Subpart O Machinery and

Machine Guarding

(b) 29 CFR 1910.147 - Occupational Safety and Health Standards Subpart J General

Environmental Controls.

3. Enclosure

(1) Concept Sketch

4. Minimum requirements

The contractor shall design and fabricate the equipment in accordance with References, Enclosures, and requirements herein. Unless otherwise specified, stated values represent the minimum.

a. The equipment shall consist of tank unit and pump unit.

b. The equipment shall be able to operate continuously while receiving a supply of fresh water and sodium nitrite water solution.

c. Liquid-contact member

(1) Liquid-contact members shall be free of oil, chemicals, and dirt, cleaned and plugged at the time of delivery.

(2) Unless there is an unavoidable technical reason, metal parts for liquid-contact member shall be made of stainless steel.

d. Corrosion control

All system components shall be protected against corrosion and deterioration by appropriate material selection, application of coatings and sealants. Painting shall result in a high wear-resistant finish. Exposed ferrous parts such as screws, bolts, nuts, washers, hinges, etc., shall resist corrosion in a salt-laden, moist, variable temperature atmosphere. Protection such as plating, galvanizing, or other electrical/chemical process, or passivated stainless steel is acceptable. Dissimilar metals shall not be used in direct contact with each other without suitable means for preventing electrolytic corrosion.

e. Electric components

All electric components shall be installed in accordance with the manufacturer’s technical instruction and JEAC 8001 or other applicable standards. All electric components shall be waterproof or contained in a waterproof enclosure. Ground Fault Circuit Interrupter (GFCI) shall be provided. Voltage of control circuits shall be dropped down to 120 Volts or lower. All components shall be adequately grounded. A means of protection against overload, overheat, short circuit, and ground fault shall be provided. A new lockable (that can be locked out with a lock and key device) power disconnect box, shall be provided, and installed on the equipment.

The disconnect box (if applicable) shall have a proper sized (i.e. following the NEC, etc.) fused device, that shall protect the machine from a power surge, etc.).

f. Unless otherwise getting approval of Technical Point of Contact (TPOC) in advanve, work at the Government facility shall be conducted during the hours of 8:00 am to 4:45 pm (excluding

12:00 pm to 12:45 pm), Monday through Friday (excluding Federal Holidays).

g. Labels and signs for safety precaution, operation guidance, ports and connectors shall be indicated in English-Japanese bilingual language in visible locations. A means of indication shall be resistant to friction, moisture, salt damage, and ultraviolet rays.

h. Nameplates indicating model number, serial number, manufacturer, manufacturing year and month shall be affixed to each major component of the equipment.

4-1. Tank unit

a. The tank unit shall consist of water tank, chemical tank, mixing system, and other necessary components.

b. Water tank

(1) Water tank shall be provided to contain fresh water.

(2) Effective capacity: 120 U.S. gallons (454 L)

(3) 1-1/2”-11.5 NPT water supply port with a valve and 80 μm replaceable filter shall be provided above the effective water level.

(4) Φ8” maintenance hole shall be provided at the top of the tank. Maintenance hole cover with a polycarbonate window shall be provided.

(5) Water level sensor shall be provided.

(6) Drain valve shall be provided.

(7) Material: Stainless steel

c. Chemical tank

(1) Chemical tank shall be provided to contain sodium nitrite solution made by diluting granular sodium nitrite with fresh water.

(2) Concentration of the solution contained in chemical tank is normally 6.0 lbs (2.72 kg) sodium nitrite per 35 U.S. gallons (132.5 L).

(3) Effective capacity shall be greater than 35 U.S. gallons (132.5 L). Level indicator shall be provided at 35 U.S. gallons.

(4) 1-1/2”-11.5 NPT Male water supply port with a valve shall be provided above the level of 35 U.S. gallons.

(5) Φ8” maintenance hole shall be provided at the top of the tank. Maintenance hole cover with a polycarbonate window shall be provided.

(6) Water level sensor shall be provided.

(7) Drain valve shall be provided.

(8) A valve shall be provided between the chemical tank and the mixing system.

(9) Material: Stainless steel

d. A means of supplying liquid to the pump unit shall be provided.

e. Mixing system

(1) Mixing system shall be provided to further dilute the sodium nitrite solution in the chemical tank with fresh water in the water tank to produce a waterjet cleaning solution with required concentration.

(2) A means of mixing water and sodium nitrite solution in a volumetric ratio of 17 : 1 shall be provided.

(3) Concentration of the solution downstream of the mixing system is normally 1.0 lbs

(0.45 kg) sodium nitrite per 100 U.S. gallons (378.5 L).

(4) If the accuracy of the mixing ratio is not guaranteed, a means of measure mixing ratio such as flow meter shall be provided.

(5) A means shall be provided to prevent backflow of sodium nitrite solution from the chemical tank to the water tank.

(6) A means shall be provided to provide fresh water without mixing sodium nitrite to the pump unit, for the cases that cleaning by fresh water is required.

f. Solution port and hose

(1) Solution port with a valve shall be provided downstream of the mixing system.

(2) 5m hose shall be provided to connect the solution port and the pump unit.

(3) Hose diameter shall be determined to match the pump flow rate.

(4) Quick connect couplings shall be provided at both ends of the hose.

g. Cables

(1) 5m signal cable to transfer the alarm signal to the pump unit shall be provided.

(2) Cable type shall be cabtire cable.

(3) If the mixing system requires electric power, power cable shall also be provided to feed power from the pump unit to the mixing system.

h. A secondary containment with a capacity greater than the effective capacity of liquid.

i. Wheels

(1) Four (4) swivel casters with a means of fixation shall be provided.

(2) Allowable load per one (1) wheel shall be greater than 50% of full tank weight.

(3) Wheel diameter: Φ100mm or larger

(4) Wheel material shall be nonmetallic.

j. Lifting padeyes

(1) Four (4) lifting paedyes shall be provided.

(2) Safety Working Load (SWL) per one (1) padeye shall be greater than 50% of the full tank weight.

(3) The lifting padeyes shall be aligned with lifting wires.

(4) The lifting padeyes shall be painted yellow.

(5) SWL and signs of “LIFT HERE” shall be visibly indicated near each padeye.

(6) Full tank weight and empty weight shall be visibly indicated on the main unit with units of LBS and kg.

k. Fork pockets that fit to the following fork dimensions shall be provided.

(1) Fork width: 150 mm

(2) Fork thickness: 85 mm

(3) Fork interval, center-to-center: 940 mm

l. Non-skid steps to access tank shall be provided.

m. Dimensions: 3,500 mm(L) x 2,200 mm(D) x 2,700mm(H) or smaller

n. Empty weight: 2,500 kg or less

4-2. Pump unit

a. The pump unit shall consist of pump, control feature, and other necessary components.

b. Pump

(1) The high-pressure pump shall be an electric-driven displacement pump.

(2) Maximum pressure: 12,000 psig (82.7 MPa)

(3) Maximum flow rate: 22.0 U.S. gallons/min (83.3 L/min).

(4) Pumping speed shall be adjustable between 60% to 100% of the rated speed with an inverter.

(5) Water cooled.

(6) A means of vibration damping shall be provided.

c. Rupture disc

(1) The equipment shall be provided with a non-fragmenting rupture disc for overpressure protection.

(2) Operating pressure shall be higher than 12,000 and lower than the allowable pressure of the equipment.

(3) Purge flow rate shall be greater than the pump's flow rate.

d. Regulator

(1) Regulator(s) for regulating the pressure within 2,000 psig (13.8 MPa) to 12,000 psig

(82.7 MPa) shall be provided downstream of the rupture disc.

(2) If single regulator does not meet the requirement, two-stage regulation is accepted.

e. A valve for depressurizing and drainage shall be installed downstream of the regulator.

f. A port to receive cleaning solution from the tank unit shall be provided.

g. The following ports shall be provided after the regulator.

(1) Relief valve port

(a) Connection type: NPT

(b) Nominal pipe size shall be the same as the pump outlet

(c) Valve shall be installed upstream of the port.

(d) Plugged.

(2) Pressure gauge port

(a) Connection type: 1/2”-14 G (PF) female

(b) Direction of port: upward

(c) Valve shall be installed upstream of the port.

(d) Plugged.

(3) Multipurpose port

(a) Connection type: 1/2”-14 NPT female

(b) Valve shall be installed upstream of the port.

(c) Plugged.

(4) Cleaning hose port

(a) Connection type: 1/2”-14 NPT male

(5) Drain port

h. The following replaceable filter shall be installed upstream of the pump.

(1) Type: Metal edge (with a wire wound or stacked disc) or mesh

(2) Removal particle size: 80 μm or allowable foreign material diameter of the pump, whichever is smaller

i. The following control system shall be provided.

(1) Pump switch

(2) Emergency stop button, one (1) embedded in a control panel, one (1) remote pushbutton with 16m cable

(3) Pumping speed controller and speed meter

(4) Switches which will automatically shut the machine down or relieve pressure supply to the cleaning port under any of the following conditions:

(a) Water supply tank level drops below safe level.

(b) Chemical mixing tank level drops below safe level.

(c) Pump abnormality

(d) Current and temperature rises above safe level.

(5) Regulator pressure control

(6) Energizing indicator lamp

(7) Ground Fault Circuit Interrupter (GFCI)

(8) Indicator lamp for low water tank level, low chemical tank level, low pump suction pressure, overload, reverse phase, and other abnormality

(9) Non-resettable hour meter having a range of 0 to 99,999.9 hours in increments of one

(1) tenth of one (1) hour.

j. 10m 2PNCT power cable shall be provided. O-shaped crimp terminals for Φ1/2” diameter bolt shall be attached. A means shall be provided to wind up and store the cable when transporting the pump unit.

k. 3.0 mm or thicker clear protection cover shall be provided inside the electric box.

l. Wheels

(1) Four (4) swivel casters with a means of fixation shall be provided.

(2) Allowable load per one (1) wheel shall be greater than 50% of the weight.

(3) Wheel diameter: Φ100 or larger

(4) Wheel material shall be nonmetallic.

(5) If the wheel cannot withstand the vibration of the pump, jack-up bolts shall be provided.

m. Lifting padeyes

(1) Four (4) lifting paedyes shall be provided.

(2) Safety Weight Load (SWL) per one (1) padeye shall be greater than 50% of the weight.

(3) The lifting padeyes shall be aligned with lifting wires.

(4) The lifting padeyes shall be painted yellow.

(5) Sign of “LIFT HERE” shall be visibly indicated near each padeye.

(6) Weight shall be visibly indicated on the main unit with units of LBS and kg.

n. Fork pockets that fit the following fork dimensions shall be provided.

(1) Fork width: 150 mm

(2) Fork thickness: 85 mm

(3) Fork interval, center-to-center: 940 mm

o. Retractable awning shall be provided in front of the control panel to protect operators from rain and sunlight.

p. Dimensions: 4,500 mm(L) x 2,100 mm(D) x 2,400mm(H) or smaller

q. Weight: 4,800 kg or less

4-3. Accessories

a. Spare rupture disc, 2 ea

b. Materials and tools required for operation and maintenance, 1 set

5. Operational Test (before delivery)

a. The contractor shall perform operational test at the manufacturer’s facility before delivery to verify required functions and capabilities.

b. The operational test includes, but not limited to, the following items.

(1) Visual inspection

(2) Electric conductivity among all grounded parts

(3) Insulation resistance

(4) Pressurizing test up to the maximum operating pressure

(5) Leakage check

(6) Pump pressure and flow rate

(7) Operational test of mixing system

(8) Operational test of pressure adjustment

(9) Operational test of flow rate adjustment

c. For commercial off-the-shelf items, the contractor can submit the result of the pre-shipping test conducted by the manufacturer for review and approval.

d. The Government will have the option to witness the operational test by the representative.

6. Delivery

a. The contractor shall deliver the equipment to X-41 Boiler Shop, Bldg. 1922, SRF-JRMC

Yokosuka.

b. If required by the contractor, the Government will provide forklift and operator for unloading.

7. Operational Test (after delivery)

a. The contractor shall conduct operational test to verify the equipment works properly at the site.

b. The Government will provide utilities listed in Paragraph 1.h and granular sodium nitrite.

c. TPOC will attend and witness the test.

8. Training

a. After completion of the operational test after delivery, the contractor shall conduct training for operators at SRF-JRMC facility.

b. The training shall educate operators in the knowledge and skills to handle the equipment properly and safely.

c. The training shall be performed in Japanese language by representative(s) who are sufficiently fluent in Japanese.

d. Number of trainees: up to ten (10) persons maximum

e. Training shall be conducted for at least one (1) day.

f. After the completion of the training, the manufacturer shall issue certificates for successful trainees including the following.

(a) Name of trainee

(b) Date

(c) Issuer

(d) Model name of the equipment

(e) What trainees are allowed to do

(f) Other special notes

9. Document submission

Unless otherwise specified, documents shall be written in the Japanese or the English language.

a. Pre-fabrication documents

(1) The contractor shall submit the following documents to TPOC for review and approval before start fabrication, no later than fifty (50) working days after contract award. Technical review by the Government will be completed and returned with comments within ten (10) working days after receipt from the contractor.

(a) Sketch of the equipment with dimensions

(b) Functions and capacities

(c) Parts list with specifications

(d) Catalog for commercial off-the-shelf items

(e) Work schedule

b. Operational test documents

The contractor shall submit item and procedure of the operational test (before delivery) to

TPOC for review and approval before fifteen (15) working days of the operational test.

Technical review by the Government will be completed and returned with comments within ten (10) working days after receipt from the contractor.

c. Instruction manual

(1) The contractor shall submit the instruction manual to TPOC for review and approval before the equipment delivery. The technical review by TPOC will be completed and returned with comments within ten (10) working days after receipt from the contractor.

(2) The instruction manual shall be written in both the Japanese and the English language.

(3) Instruction manual shall include the following contents.

(a) Product drawing

(b) Safety guidance (warnings and cautions)

(c) Equipment specification (name/capacity/function)

(d) Operation

(e) Maintenance and inspection (item/cycle/description)

(f) Troubleshooting

(g) Lifting procedure

(h) Parts list

d. Completion documents

The contractor shall submit the following documents in three (3) paper copies bound in durable ring binders and one (1) CD or DVD media when the equipment delivery.

(1) Approved instruction manual

(2) Result of operational test

(3) Certificate for operators in accordance with Paragraph 8.e.

(4) Certificate that the equipment contains no detectable PCBs (less than 0.5 ppm) at the time of shipment

(5) SDS (Safety Data Sheets) for all hazardous material

(6) Warranty sheet for one year

10. TPOC: TBD