New Jersey Administrative Code › Title 5 - COMMUNITY AFFAIRS › Chapter 21 - RESIDENTIAL SITE IMPROVEMENT STANDARDS › Subchapter 7 - STORMWATER MANAGEMENT › Appendix A

Current through Register Vol. 56, No. 14, July 15, 2024
CORRUGATED METAL PIPE STANDARDS
Corrugated metal pipe, when approved by the municipal engineer,
				  shall meet the requirements and be installed in the following manner. Corrugated
				  metal pipe for drainage structures is allowed in accordance with the map below. In
				  areas with acid waters (shaded area on the map), design engineers may use aluminum
				  alloy, provided the environmental limitations below are met. In neutral/alkaline
				  waters (unshaded on the map), aluminum, aluminum-coated steel type 2, and
				  polymeric-coated steel may be used, provided the environmental limitations below are
				  met. Water pH and resistivity values must fall within the ranges shown below.
				  Samples should be measured in accordance with ASTM G51 and G57. Avoid sampling water
				  during storm events or for two days following a storm to insure more typical
				  readings. If there are severe corrosive conditions (pH < 4), fiber-bonded steel
				  pipe should be used.
ENVIRONMENTAL LIMITS FOR CORRUGATED METAL
						  PIPE
Pipe
						  type
pH
Resistivity values
						  (ohm-cm)
aluminum
4-9
> 500
aluminum-coated type 2
5-9
> 1500
polymeric coated
5-9
> 1500
fiber bonded
< 4
--
If the design velocity is greater than 10 feet per second, a
				  one-half bituminous coating and paved invert in accordance with ASTM A849 (AASHTO
				  M190) is required.
Minimum depth of coverage shall be as follows:
MINIMUM DEPTH OF COVERAGE FOR
CORRUGATED METAL PIPE
Minimum cover (inches) from top of pipe
to bottom of flexible payment or top of
Pipe diameter (inches)
rigid
						  pavement
12 inches to 48 inches
12 inches
54 inches of more
Per manufacturer's
						  recommendations
Corrugated aluminum pipe shall conform to the requirements of ASTM
				  B745 (AASHTO M196) for types I, II, IR, IIR, and III.
Corrugated aluminum-coated steel type 2 pipe shall conform to the
				  requirements of ASTM A760 (AASHTO M36) for types I, II, IR, IIR, ands III and have
				  an aluminum-one ounce type 2 coating as specified in ASTM A929 (AASHTO M274).
Corrugated polymeric-coated steel pipe shall conform to the
				  requirements of ASTM A762 (AASHTO M36) for types I and II and have a polymeric 10/10
				  coating as specified in ASTM A743 (AASHTO M246).
Corrugated fiber-bonded steel pipe shall conform to the
				  requirements of ASTM A760 (AASHTO M36) for types I and II and have an aramid fiber
				  composite coating as specified in ASTM A885. In addition, the pipe shall be
				  bituminous coated as specified in ASTM A849 (AASHTO M190).
Corrugated metal pipe shall be fabricated with annual corrugations
				  by riveted lap joint construction or with helical corrugations and a continuous weld
				  or lock seam extending from end to end of each length of pipe.
Connecting bands shall be manufactured in accordance with ASTM
				  A760 (steel) or B745 (aluminum) and have the same base metal and coating as the
				  corrugated metal pipe. All pipe ends shall be annularly reformed a minimum of two
				  corrugations.
Fittings and end sections shall be of the same base metal and
				  coating as the corrugated metal pipe.
Corrugated metal pipe shall be installed per ASTM A798 (steel) or
				  ASTM B788.
Maximum cover and structural design of corrugated metal pipe shall
				  be per ASTM A796 (steel) or ASTM B790.
Data in
				  image