More info
Description / Abstract:
This specification covers composite corrugated steel pipe,
intended for uses such as storm water drainage, sanitary sewers,
underdrains, construction of culverts, and similar uses. The
composite material used in fabrication of the pipe consists of a
three-layer polymer protective coating on both sides of a steel
sheet core. The three layers consist of an inner layer of
fusion-bonded epoxy on the steel surface, an intermediate layer of
polyethylene adhesive, and an outer layer of high-density
polyethylene.
The three-layer polymer coating protects the base metal against
corrosion or abrasion, or both. Severe environments are likely to
cause corrosion problems to accessory items such as coupling band
hardware unless supplemental protection is provided. Additional
protection for composite steel pipe is available by use of coatings
applied after fabrication of the pipe as described in Specification
A 849.
This specification does not include requirements for bedding,
backfill, or the relationship between earth cover load and sheet
thickness of the pipe. Experience with drainage products has shown
that successful performance depends upon the proper selection of
corrugation profile, sheet thickness, type of bedding and backfill,
controlled manufacture in the plant, and care in installation. The
installation procedure is described in Practice A 798/A 798M.
This specification is applicable to orders in either inch-pound
units as A 1042, or in SI units as A 1042M. Inch-pound units and SI
units are not necessarily equivalent. SI units are shown in
brackets in the text for clarity, but they are the applicable
values when the material is ordered to A 1042M.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
requirements prior to use.