GOX Trailer Modification and Recertification

NASA's Shared Services Center seeks modification and recertification of a government-owned gaseous oxygen tube trailer, with proposals due July 8, 2026. This is a sole source procurement under FAR 12.102(a) directed to WELDSHIP LLC, though the government invites written capability statements by July 8 at 7:00 a.m. Central Standard Time to determine whether competitive procurement is warranted; the government reserves the right to proceed with sole source award or convert to competitive procurement.

Place of performance is NASA Langley Research Center, Hampton, Virginia. The work involves quinquennial disassembly, inspection, modification, and recertification of one high-pressure gaseous oxygen tube trailer (NASA Asset NA00204T, License No. 1364) containing 30 ICC 3A-2400 cylinders. Key modifications include removing and replacing two existing Sherwood valves with new 1882 Sherwood valves with stem-threaded packing, and adding two new HP2000 pneumatic-actuated valves on the manifold. The trailer shall be returned filled with 99.5% pure oxygen per CGA G-4.3-2015 specifications. Work includes disassembly, valve and fitting inspection and replacement, internal cylinder cleaning, hydrostatic pressure testing per DOT and CGA standards, exterior preparation and painting, precision cleaning to Level 1000B per KSC-C-123J specifications, and post-assembly nitrogen pressurization testing with 72-hour dwell verification and individual cylinder valve leak rate verification per API 598. The contractor must provide material certifications, cleanliness level verification reports, and updated schematics. Performance period is 150 days after receipt of order. The NAICS code is 332999. Pickup and delivery to NASA Langley, including all scheduling coordination, are included in the contract price, with the government providing up to five days advance notice.