SECTION 033000 - CAST-IN-PLACE CONCRETE

Sludge Treatment Project Engineered Container Retrieval and Transfer System January 2012
2. Wash piping spools and components in hot, alkaline-cleaner-water solution of sodium
carbonate or trisodium phosphate in proportion of 1 lb (0.453 kg) of chemical to 3 gal.
(11.3 L) of water.
3. Scrub to ensure complete cleaning.
4. Rinse with clean, hot water to remove cleaning solution.
5. Prior to fit-up and welding, piping shall be visually checked for cleanliness. If examination
reveals rust, loose mill scale, or foreign matter, pipes shall be blown out with dry,
oil-free air or nitrogen before placing in position. If foreign material appears to be lodged
in the pipe, it shall be removed by running fish tape, cable, or chain through the pipe.
6. After NDE is complete and before connecting system into existing systems, clean piping
internal surfaces mechanically or by water flushing.
7. Flush piping with potable water until effluent is clean and contains no visible particulate
matter. Flushing pressure shall not exceed the design pressure specified in pipe class.
Flushing water supply shall have sufficient capacity to produce a flow velocity of 4 to 6
ft/s in largest pipe size, with pipe full. Provide flow measurement in flushing water
supply line to be used as basis for verification of velocities in piping system.
8. Cleaning materials for stainless steel shall meet the requirements of Section 3.1.C.
9. Cleaning materials shall be controlled and documented in accordance with the Seller's fabrication,
inspection and test plan as approved by the Buyer.
10. Provide documented evidence that water flushing or mechanical cleaning has been accomplished
as specified in this section.
11. After cleaning and water flushing, remove all water and blowout lines with clean oil free
air and cap the lines with chloride free plastic caps or reconnect to the system.
C. Stainless Steel Fabrication
1. Clearly mark mechanical cleaning tools for use only on stainless steel.
2. Tools marked for stainless steel shall be used on stainless steel only. Tools previously
used on carbon steel shall not be used on stainless steel.
3. Grinding wheels, files, and wire brushes shall be new or previously used only on stainless
steel.
4. Wire brushes used on austenitic stainless steel shall be made of stainless steel and marked
and controlled for use on stainless steel only. Grinding wheels shall be resin bonded aluminum
oxide. Rotary files shall be faced with tungsten carbide.
5. Temporary carbon steel clamps, supports, braces, or fixtures used during fabrication shall
not be welded directly to, or come in direct contact with, any stainless steel surface. Galvanized
steel clamps are not permitted.
Contract 44577 KW Annex – Rev E. 44577-CSI-SPEC-001 402319-20