Tab 10 Technical clarification for
Updated
A PDF document (121 KB) attached to Tubing Fittings & installation Hardware, from the National Aeronautics and Space Administration. Due Oct 30, 2026, 4:00 PM (UTC-5).
File name: Tab 10 Technical clarification for 80NSSC27947142Q.pdf
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Technical clarification for 80NSSC27947142Q
1. On pages 3 and 4, please define TRTX and provide the required port arrangement, end connections and governing part or drawing references for the Boss TEE Bull, Boss TEE Run and Boss 90 fittings.
For AN fittings use the following standard part numbers:
UNION =
AN815
Boss 90 =
AN822
CROSS =
AN827
Reducing
Union = AN919
Tee = AN824
TRTX = 37 deg
flare tube end
reducer
Boss Tee Bull =
AN825
Sleeve =
AN819
Boss Tee Run =
AN826
B-nut = AN818
2. For the medium-pressure and high-pressure fittings and adapters, please specify the required pressure and temperature ratings, tube-size basis, connection series and cone/thread geometry. Which American Society of Mechanical Engineers (ASME) B31.3 edition applies? Most current
For medium pressure fittings, we are looking for these Autoclave components or equivalent
UNION = 20UFX CROSS = CXX
TEE = CTX
MxF Adapters
= Male/ Female
HP x MP= High
Pressure x
Medium
Pressure
Collar = CCLX
Required MP
pressure
20,000 psi
Gland Nut =
CGLX
F MP Female
med pressure X
boss fitting x
boss
Medium
Pressure
operating temp
-423F to 1200F
3. For the virgin polytetrafluoroethylene (PTFE) O-rings and copper crush washers on pages 4 and 5, please provide the required dimensions or applicable part/standard references for each listed size.
Copper crush washers should be SECO SEALS SEC07 or equivalent o-ring sizes
1”
1.171 1.00 .116
¾”
0.924' - 0.116"
½”
0.644 0.087
¼”
0.351 0.072
4. Section 3.2 requires delivery within twelve weeks after award and allows partial deliveries for extended lead times. Must every item arrive within twelve weeks, or may an accepted partial-delivery schedule extend final delivery? Lead times should be provided as part of quote. We would like everything possible to be delivered within 12 weeks but understand and will accept a partial delivery of items with longer lead times after the 12 weeks.
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What do the designations AN, MP, and HP represent within the fittings list? The SOW references AN (Army-Navy), MP (Medium Pressure), and HP (High Pressure) fittings, but the supplier is requesting additional detail regarding the intended specifications.
The AN spec was included in the SOW. For MP and HP see Autoclave for an example of the fittings
What pressure ratings are required for the MP and HP fittings? We were unable to locate specific pressure-rating requirements in the solicitation documents. See Autoclave for pressure ratings (varies per fitting and size)
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