SATPC0041518 Tab 04 4 SOW..pdf

Statement of Work for LARCPR-XXXX

Subject:

Requester:

Recertification of high-pressure, gaseous oxygen tube trailer

NASA Asset NA00204T (#1364)

Statement of Work - Modification and Recertification of D.O.T. Trailer

Line Item 1: Recertification

Inspect, modify, and certify as follows:

1. Perform quinquennial disassembly, painting, hydrostatic pressure test, and precision internal cleaning of one (1) Government-owned gaseous oxygen tube trailer in accordance with the current DOT regulations and NASA requirements in this Statement of Work.

2. Remove and replace the current two (2) Sherwood valves with new 1882 Sherwood valves.

These valves shall have stem threaded above the packing.

3. Add two new HP2000 pneumatic-actuated valves located on manifold where two pressure indicators/hand valves are located.

4. Trailer shall be returned filled with product as per procedures outlined in this Statement of Work.

5. Price shall include pick-up and delivery to NASA Langley Research Center, Hampton, VA.

Description of Trailer

Trailer License No.: 1364

Type of Gas: UHP Oxygen

Semi-Trailer Comp: MH-1

Overall Trailer Length: 282 inch

Overall Trailer Width: 96 inch

Overall Trailer Height: 97 inch

Type of Cylinders: ICC 3A-2400

Manufacturer: Standard Steel Works, North Kansas City, MO

Approx. length of cylinders: 21 feet

Outside diameter of cylinders: 9-5/8 inch

Number of cylinders: 30

Approx. water volume of each cylinder @ 70°F: 9 cu. ft.

DOT Re-Test Due Date: 2026

Requirements

All procedures shall be performed in accordance with applicable DOT, CGA, and NASA regulations and requirements specified.

Price shall include pick-up and delivery to NASA Langley Research Center, Hampton, VA. The government will ensure that the trailer is road worthy and will be empty with placards and labels that indicate the trailer is empty.

Procedure

1) The Contractor shall disassemble the subject tube trailer into its individual bottles, manifolds, and connected plumbing hardware.

2) The contractor shall inspect all valves, fittings, and pressure relief devices (PRD's), and replace or refurbish any that are compromised, or fail to meet functional intent. Compromised includes all damage to NGT and NPT threadings that would reduce the integrity of connections.

a) All elastomers and lubricants used in the components shall be rated “A” for mechanical impact test of 6700 psi per KTI-5210 Revision C (SEE SOW

ATTACHMENT A) unless approved by the contracting officer.

b) All metallic items used shall be Type 316 Stainless Steel (S31600) or a metal with a higher “Promoted Ignition Lowest Burn Pressure” per Table 2 of KTI-5120 Revision C.

c) The contractor shall provide material certifications for all new components, elastomers, and lubricants used.

3) The contractor shall inspect the internals of the cylinders and remove all deleterious material including rust, Teflon tape, and any other foreign material that could present blockage flow through valves and connected plumbing.

4) The contractor shall pressure test the cylinders in accordance with DOT and CGA regulations including CGA C-1, Methods for Hydrostatic Testing of Compressed Gas Cylinders. The contractor shall take care when using Teflon tape to ensure that excess material is not released into the cylinders or connected plumbing in the process of performing these tests.

5) The contractor shall:

a) Remove all rust, dirt, and loose paint from the exterior of each of the gas cylinders and other trailer parts. If sand blasting is to be performed, all other parts of the trailer that could be damaged by the sand blasting shall be protected.

b) Apply one coat of zinc chromate primer, Federal Spec. TI-P-645 or equal, and two coats of Spatz White Enamel, No. 2109 or equal, to each of the gas cylinders.

c) Treat for any surface corrosion/oxidation properly, and then paint trailer parts with one coat of epoxy primer or equal, and two finish coats of exterior enamel yellow paint.

d) Apply identifications and markings to trailers in accordance with the latest edition of the applicable DOT regulations.

6) The contractor shall clean the wetted surfaces of bottles, components, manifold, and all other wetted surfaces of the tube bank assembly to Level 1000B (or cleaner) per Table 1 “Fluid Surface Cleanliness Levels” of KSC-C-123J (2009) (SEE SOW ATTACHMENT B).

a) If the contractor cleans, tests, and verifies the surface cleanliness levels per KSC-C-123J then a certificate shall be signed stating this along with signed cleanliness level verification reports for the bottles, manifolds, valves, and other components of the tube bank assembly.

b) If the contractor chooses to clean and test for cleanliness with other methods then the contractor shall submit these procedures for approval by the government prior to beginning cleaning.

c) Regardless of the cleaning method, the final flush and testing fluid solvent shall be one of those shown on Table 3 “Solvents, Maximum Allowable Nonvolatile Residue” of KSC-C-123 that does NOT have note 2 or 3 indicated or another solvent that is tested and certified to satisfy the requirements of NASA-STD-6001B “Flammability, Odor, Offgassing, and Compatibility Requirements and Test Procedures for Materials in Environments that Support Combustion”.

d) Following cleaning the components shall be purged dry with Quality Verfication Level (QVL) “Q” nitrogen per CGA G-10.1-2016 “Commodity Specification for Nitrogen”. The purge gas vessel and piping system shall be verified to be clean to Level 300A per KSC-C-123F. The purge gas shall be filtered with a 10 micron filter prior to being introduced into the clean tube trailer components.

7) The contractor shall reassemble the tube trailer while maintaining the cleanliness integrity of the wetted surfaces.

8) Following completion of hydrostatic testing, painting, cleaning, and reassembly, the contractor shall pressurize and leak test trailer, including all cylinders, manifolds and connected plumbing, as follows:

a) Pressurize with nitrogen to 2400 psig. Test gas shall be Quality Verification Level (QVL) “Q” per

CGA G-10.1-2016 “Commodity Specification for Nitrogen”. The purge gas vessel and piping system shall be verified to be clean to Level 300A per KSC-C-123F. The purge gas shall be filtered with a 10 micron filter prior to being introduced into the clean tube trailer components.

b) Perform a soap bubble leak test on each joint mechanical mated component. Repair and re-test until all individual leaks at each mating are below 10 bubbles per minute.

c) Perform a dwell test at a minimum of 2000 psig for 72 hours and verify the comprehensive leak rate of the fully integrated system is less than (<) 8.71e-04 scfm [~ 10 psid / 72 hrs].

d) Verify the performance of all cylinder valves by filling the cylinders to nominal full trailer pressure, closing all cylinder valves, venting the manifolds to atmosphere, closing the vent valves, then closing the main manifold valves. Allow the system to dwell long enough to ensure that the valve leak rates meet limits specified in API 598 for gases.

9) The contractor shall inspect, repair, and/or replace any safety features or devices that fail to meet specifications on the trailer.

10) The contractor shall deliver the trailer filled with 99.5% pure oxygen per CGA G-4.3-2015 “Commodity Specification for Oxygen” Quality Verification Level “C”. The tube bank shall be delivered in a leak free condition to NASA Langley Research Center.

Pick-up and Delivery

All coordination and scheduling for pickup, and delivery of the trailer shall lie with the Facility Coordinator, Upon confirmation of roadworthiness of the trailer, NASA shall contact the Contractor to schedule a pickup of the tube trailer at NASA Langley Research Center, in Hampton, Virginia with Contractor-furnished equipment, and deliver the trailer to the Contractor's inspection facility. Upon completion of all the requirements herein, the Contractor shall coordinate the return of the trailer to a location on the NASA Langley Research Center, as per direction of the acting Facility Coordinator, or his alternate. Note - The government may require up to five days advance notice of pickup to ensure that the trailer is prepared and road worthy.

Certification

Whence the contractor has satisfactorily completed all said requirements herein, the Contractor shall furnish the Government with certification documentation stating that the tube trailer has met all the current requirements of the US Department of Transportation (US-DOT) governing high-pressure, gaseous oxygen tube transport trailers. In addition, the contractor shall include an updated schematic that clearly notates each bottles' serial numbers associated with their location in the physical layout of the trailer, and include any notable discrepancies, concerns, or findings, that should be included with the certification papers.