REPLACE FEED WATER PIPING - RFI RESPONSES.docx

W911PT26QA073 – REPLACE FEED WATER PIPING: RFIs

1. For the “Hot Well” piping, can you confirm the pipe schedule existing (sch 40 or sch 80). Our drawings do not indicate what the schedule of the piping is. Assumed to be schedule 80.

1. Are there AIS requirements for materials for this project? Yes, all the piping and fittings shall be American made

1. Can you confirm no painting is required? Correct, no painting will be required

1. To maximize efficiency, we would want to avoid field welding as much as possible. With that;

3. For both the feed water and hot well piping, is it acceptable to create new flange sets in certain locations to facilitate off-site fabrication and reduce the number of field welds required? All the piping shall be welded, no new flange sets.

3. For x-ray inspections, do these have to be done on-site following installation or can they be performed at our shop when the pipe is fabricated, assuming the answer to (a) is yes? X-ray inspections will be performed on site. The project COR will pick 10 welds to be inspected.

1. During the walk through, it was agreed that existing hangers would be re-used. Is this the official decision or do we need to include cost for demo/install of hangers? Yes, the hangers may be reused. Updated in the SOW v4.

NOTE:

*** There will also be three (3) ¾” threadolets that will need to be installed approximately 4 inches above the flanges for each of the three hot well lines. Black iron nipple, ball vale and plug installed into each threadolet ***

Added into SOW Rev4 section 3.1.4.f