Nitrogen Piping Replacement for Plasma Spray Booth - QA

1. Will the drawings be available before Friday's bid date? A -Please monitor sam.gov, for when the drawings will be available.

2. Is the bid being extended?

A - Yes. This is extended until 30 October at 12:00pm CDT.

3. Are we reusing the valves or are new ones required?
A- Reference PWS Section 1.2.3 and 1.6. Valves as components of the storage tanks, generator, regulator, and spray booth are part of those systems and not included in the scope of work.

4. During the site visit it was stated that the material was 304, however the scope says 316L please clarify?
A- The drawings and PWS calls for ASTM A269 annealed seamless 316 stainless steel tubing. Use the (low carbon) 316L for welding and compression fittings.

5. Will there be a place on site to fabricate and weld outside? A- Yes, the government will provide a limited work area. A Hot work permit from the Fire Department is the responsibility of the contractor.

6. DRAWING AND APPENDICES: The PWS references drawing 24E173, Appendix A (equipment) and Appendix C (safety plan requirements). None of these were in the posted package. Please send them?

A - OBCA will furnish drawing 24E173. ASME B31.3 is available on the web. Appendix C (Safety Plan Requirements) will be included.

7. FOOTAGE AND SIZE: If the drawing isn't available before the close, please provide the approximate total length, pipe size/schedule and mounting height of the existing line. A - All dimensions are to the field verified. Approximately 275’-325’ of ¾” run and 50’-75’ of ¼” run. It is 25’ AFF to the ceiling deck.

8. SITE VISIT: Is a walk-through available before the Oct 16 due date? A - No

9. EQUIPMENT: Are the nitrogen generator, storage cylinders and regulator existing Government equipment to be reconnected, or is the contractor to furnish any of them? A - The Nitrogen generator, storage cylinders, and regulators with the vent piping are to the reconnected after the integrity and leak tests are passed.

10. TEST GAS: For the 5,500 psi pneumatic test, may the existing generator/storage be used as the pressure source, or should the contractor supply test gas? A - Contractor needs to supply the test gas source. The storage cylinders have relief valves set lower than 5500 psi. The generator is normally capable up to 5,000 psi. The rupture disk downstream of the regulator is set lower to about 2500 psi.

11. LIFT: Will a lift be furnished for the overhead work, or should the contractor provide one?
A - PWS Section 1.1, “…Contractor shall provide all labor, tools, material, parts, equipment