MATERIALS
SPECIFICATION, GRADE, CLASS
Steel Pipe
AWWA C200
150 mm 6 in. and Larger
Steel Plates, Pressure Vessel
ASTM A 516/A 516M, Grade 55
Steel Plate
ASTM A 242/A 242M
Stainless Steel Plate
ASTM A 167, UNS S30400 or
ASTM A 176, UNS S40500
Quality Steel
ASTM A 36/A 36M
Surface Texture
ASME B46.1
2.1.2
Bolted Connections
2.1.2.1
Bolts, Nuts, and Washers
Bolts, nuts, and washers shall conform to requirements herein specified and
the paragraphs SUBMERSIBLE PUMP, DISCHARGE TUBE [AND DISCHARGE ELBOW], and
the subparagraph, NUTS AND BOLTS for types required. Use beveled washers
where bearing faces have a slope of more than 1:20 with respect to a plane
normal to bolt axis.
2.1.2.2
Materials Not Specifically Described
Materials not specifically described shall conform to the latest ASTM
specification or to other listed commercial specifications covering class
or kinds of materials to be used.
2.1.3
Flame Cutting of Material
Flame cutting of material other than steel shall be subject to the approval
of the Contracting Officer. Shearing shall be accurately done, and all
portions of work neatly finished. Steel may be cut by mechanically guided
or hand-guided torches, provided an accurate profile with a smooth surface
free from cracks and notches is secured. Surfaces and edges to be welded
shall be prepared in accordance with Section 3 of AWS D1.1/D1.1M. Chipping
and/or grinding will not be required except where specified and as
necessary to remove slag and sharp edges of technically guided or
hand-guided cuts not exposed to view. Visible or exposed hand-guided cuts
shall be chipped, ground, or machined to metal free of voids,
discontinuities, and foreign materials.
2.1.4
Alignment of Wetted Surfaces
Exercise care to ensure that the correct alignment of wetted surfaces being
joined by a flanged joint is being obtained. Where plates of the water
passage change thickness, a transition shall occur on the outer surface,
leaving the inner surface properly aligned. When welding has been
completed and welds have been cleaned, but prior to stress relieving,
joining of plates shall be carefully checked in the presence of a
Government inspector for misalignment of adjoining parts.
SECTION 15132A
Page 18
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