Questions From Solicitors (003).pdf

Contractor Questions – 36C24423Q0046

1. Will all (4) boilers be available at the same time for this work? If not, can you please explain how boiler shutdowns will be staged?

One boiler will be available at a time. When a completed boilers drum sealing has been verified, the next boiler will be made available. The next boiler will already be cooled but will need to be drained, and locked out, which could take several hours.

2. With there being (4) boilers, I would like to confirm that there is a total of (12) manhole surfaces/doors and not (16) manhole surfaces/doors.

12 Manholes doors only

3. Will the contractor need to provide and erect scaffolding to access the steam drum surfaces?

The steam drums are 9-10’ above the operating floor with no platforms present.

4. Who is the manufacturer and what is the model number of the boilers?

E. Keeler water tube boilers. One 40000#/hr and two 20000#/hr boilers

5. Can you please provide a legible picture of each boiler’s National Board Plate?

Manufacturer’s data sheets are attached.

6. Is there any information regarding the last known or current condition of the manhole surfaces?

Useful life testing has recommended resurfacing the mating surfaces of the drums due to age and pitting.

7. Will any weld build up on the manhole surfaces be required prior to machining?

There may be some build up required. We are able to get the doors to seal using specialized gasketing.

8. Will there be any internals to be removed to gain access to the confined spa.

I am not sure what space is needed for the milling equipment, it is possible the contract will need to remove some trays in the steam drum.

9. The scope of work mentions 4 boilers. Can you clarify if there are 3 or 4 boilers?

If there are 4 boilers can you share the data report for the fourth boiler?

Only three boilers, one has been taken out of service.

10. Can you confirm that a bond is not required for solicitation notice 36C24423Q0046?

No bond is required.

11. Can you please provide a picture of the exterior of the Muddrum and Steamdrum showing the manhole exterior?

The attached pics should answer most of the questions.

12. Are the manholes rolled into the Steamdrum and Muddrum or are they an insert flange welded on both sides?

Pictures should answer the question

13. Are there existing hinges welded onto the pressure vessel or will we have to weld hinges onto the pressure vessel? The above requested pictures may answer this for us.

There are currently hinges welded on inside surface of the drum heads for the current drum doors. The condition of those welds will need to be checked for integrity and aligned so that the doors will shut without a struggle. This is an important item that may require some welding on the current hinge setup.