**************************************************************************
Use [3/16] [_____] mm inch minimum thick carbon steel conforming to ASTM A
36/A 36M [_____] or material having equivalent structural properties and
corrosion resistance for separator, hoppers, stationary and adjustable
weirs, nozzles, flow distributor and energy dissipator device, bolts,
seals, stiffeners, washers, [separator cover] and nuts. Weld in accordance
with AWS D1.1/D1.1M to provide watertight separator that will not warp or
deform under load. Use welders qualified in accordance with AWS Standard
Qualification Procedure. Grind welds smooth and remove weld spatter.
Fabricate free of kinks and sharp bends in a manner not to reduce the
strength of steel to a value less than that intended by the design. Size
and shape of bends shall be uniform. Clean and finish [carbon steel]
[_____] surfaces as described in paragraph entitled "Separator Corrosion
Protection."
2.1.1
Separator Corrosion Protection
2.1.1.1
Steel Separator
After shop conducted hydrostatic tests have been successfully completed,
provide a MIL-P-24441 coating system to the interior and exterior surfaces
of the separator. Prior to shop painting, abrasive blast clean the
surfaces in accordance with SSPC SP 10 to a surface profile of 0.025 to
0.0625 mm 1 to 2 1/2 mils. Apply primer conforming to MIL-P-24441/1,
Formula 150 applied to a minimum dry film thickness of 0.075 to 0.10 mm 3
to 4 mils. Apply intermediate coat conforming to MIL-P-24441/2, Formula
151 applied to a minimum dry film thickness of 0.075 to 0.10 mm 3 to 4 mils.
Apply topcoat conforming to MIL-P-24441/3, Formula 152 applied to a
minimum dry film thickness of 0.075 to 0.10 mm 3 to 4 mils. Total dry film
thickness shall not be less than 0.23 mm 9 mils. Repair and replace areas
of the coating system which are found to be damaged or defective upon
delivery of equipment to the site or found to be defective due to work of
the applicator. An interior polytetrafluoroethylene liner with a minimum
thickness of 3 mm 1/8 inch may be provided in lieu of paint coating the
interior separator surfaces.
2.1.1.2
Other Than Steel Separator
**************************************************************************
NOTE: If other than steel is specified for the
separator material, the designer shall specify an
appropriate protective coating system for the
separator material specified.
**************************************************************************
After shop conducted hydrostatic tests and have been successfully
completed, provide a coating system which will protect the separator from
the oil-in-water mixture, [atmosphere,] and in situ soil conditions
specified herein.
2.1.1.3
Cathodic Protection
**************************************************************************
NOTE: Specify cathodic protection for metal
separators in contact with soil. Design cathodic
protection in accordance with the current edition of
MIL-HDBK-1004/10, "Electrical Engineering Cathodic
Protection" and edit the appropriate guide
SECTION 11311
Page 10
Previous Page
