with the stainless steel parts of the couplings used
for plain-end piping.
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Standard or extra strength, as indicated, conforming to ASTM C 700.
2.1.3
Corrugated Steel Pipe
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NOTE: The several different metallic coatings may
not provide equal protection of the base metal
against corrosion and /or abrasion in all
environments. For severe environments, a
combination of special coatings may be required to
provide the desired service life. Additional
protection for corrugated steel pipe may be provided
by use of non-metallic coatings applied before or
after fabrication of the pipe. A description of
available coatings and durability guidelines is
included in the National Corrugated Steel Pipe
Association (NCSPA) publication "Modern Sewer
Design".
Corrugated steel piping in accordance with ASTM A
885 (aramid fiber composite coating) is recommended
for use where severely corrosive conditions, such as
highly acid soils, tidal drainage, mine drainage,
and certain industrial wastes, are present.
To promote competitive bidding, polymer precoated
pipe should generally be specified as an option if a
non-metallic coating is required to provide the
desired service life. Many pipe manufacturer's
produce polymer precoated pipe in lieu of bituminous
coated pipe. Polymer precoating provides greater
additional service life than bituminous coating.
Some severe environments may cause corrosion
problems to accessory items such as rivets or
coupling band hardware that do not have a polymer
coating.
Other corrugation sizes are available and may be
specified.
Corrugated steel pipe is also available in a form
called "nestable culvert pipe." This pipe is
furnished in semi-cylindrical pieces which are
fastened together on the job site to form a pipeline
of round cross section. Nestable culvert pipe was
developed as a means of conserving shipping and
storage space, and its use should be considered when
such space is at a premium, as in some overseas
projects, etc. When specified, nestable culvert
pipe should conform to MIL-P-236. Other
newly-developed products may be included subject to
approval, on a case-by-case basis, by HQUSACE
(CEMP-ET) Washington, DC 20314-1000.
Sheet thickness shall be as indicated.
Use Annular
SECTION 02630
Page 16
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