North Coast Conduit
Smoothwall and Ribbed Conduit

Smoothwall Innerduct

North Coast Conduit Smoothwall is manufactured from High Density Polyethylene (HDPE) and is intended for use in underground, aerial, and innerduct applications. Smoothwall offers superior protection and serves as an ideal raceway for future cable expansion.

Smoothwall Innerduct is available in ½", through 4" diameters. Options include:

Smoothwall Innerduct is offered in custom lengths on collapsible steel reels or in straight lengths. A full line of couplers and terminal connectors are also available.


Standards

North Coast Conduit Innerduct is manufactured according to the following industry standards:

ASTM D 2239
Polyethylene (PE) Plastic Pipe (SIDR) Based on Controlled Inside Diameter.

ASTM F 2160
Solid wall High Density Polyethylene (HDPE) Conduit based on Controlled Outside Diameter (O.D.).

NEMA TC-7
Electrical Plastic Conduit.


Resin Properties

The resin properties meet or exceed the values listed below for HDPE:

ASTM Test Description Values HDPE
D-1505 Density g/cm3 0.941–0.955
D-1238 Melt Index, g/10 min Condition E 0.05–0.50
D-638 Tensile strength at yield (psi) Environmental Stress Crack Resistance 3000 min.
D-1693 Condition B,F 20 96 min.
D-790 Flexural Modulus, MPa (PSI) 80,000 min.
D-746 Brittleness Temperature -75° C

Dimensional Specifications

Part Number Size Nominal
ID
Nominal
OD
Minimum
Wall
Weight per
100 Feet
SDR 7 – ASTM D3035
1"SDR7 1" 0.939 1.315 0.188 28.552
1-1/4"SDR7 1-¼" 1.186 1.660 0.237 45.448
1-1/2"SDR7 1-½" 1.358 1.900 0.271 59.491
2"SDR7 2" 1.697 2.375 0.339 93.012
3"SDR7 3" 2.500 3.500 0.500 202.140
4"SDR7 4" 3.214 4.500 0.643 334.212
 
SDR 9 – ASTM D3035/F 2160
1"SDR9 1" 1.023 1.315 0.146 23.000
1-1/4"SDR9 1-¼" 1.292 1.660 0.184 36.599
1-1/2"SDR79 1-½" 1.478 1.900 0.211 48.026
2"SDR9 2" 1.847 2.375 0.264 175.102
3"SDR9 3" 2.722 3.500 0.389 163.084
4"SDR9 4" 3.500 4.500 0.500 269.520
 
SDR 11 – ASTM D3035/F2160
1/2"SDR11 ½" 0.688 0.840 0.076 7.825
3/4"SDR11 ¾" 0.860 1.050 0.095 12.226
1"SDR11 1" 1.075 1.315 0.120 19.325
1-1/4"SDR11 1-¼" 1.358 1.660 0.151 30.706
1-1/2"SDR11 1-½" 1.554 1.900 0.173 40.262
2"SDR11 2" 1.943 2.375 0.216 62.845
3"SDR11 3" 2.864 3.500 0.318 136.360
4"SDR11 4" 3.682 4.500 0.409 225.483
 
SDR 13 5 – ASTM D3035/F2160/NEMA TC-7 EPEC-B
1/2"SDR13.5 ½" 0.716 0.840 0.062 6.500
3/4"SDR13.5 ¾" 0.894 1.050 0.078 10.217
1"SDR13.5 1" 1.121 1.315 0.097 15.921
1-1/4"SDR13.5 1-¼" 1.414 1.660 0.123 25.477
1-1/2"SDR713.5 1-½" 1.618 1.900 0.141 33.423
2"SDR13.5 2" 2.023 2.375 0.176 52.155
2-1/2"SDR13.5 2-½" 2.449 2.875 0.213 77.031
3"SDR13.5 3" 2.982 3.500 0.259 113.120
4"SDR13.5 4" 3.834 4.500 0.333 186.994
 
SDR 15.5 – ASTM D3035 /F2160
1"SDR15.5 1" 1.147 1.315 0.084 13.935
1-1/4"SDR15.5 1-¼" 1.446 1.660 0.107 22.393
1-1/2"SDR715.5 1-½" 1.654 1.900 0.123 29.455
2"SDR15.5 2" 2.069 2.375 0.153 45.814
3"SDR15.5 3" 3.048 3.500 0.226 99.712
4"SDR15.5 4" 3.920 4.500 0.290 164.528
 
SCHEDULE 40 – ASTM D2447/F2160/NEMA TC-7 EPEC-40
1/2"SCH40 ½" 0.622 0.840 0.109 10.738
3/4"SCH40 ¾" 0.824 1.050 0.113 14.269
1"SCH40 1" 1.049 1.315 0.133 21.185
1-1/4"SCH40 1-¼" 1.380 1.660 0.140 28.677
1-1/2"SCH40 1-½" 1.610 1.900 0.145 34.293
2"SCH40 2" 2.067 2.375 0.154 46.093
2-1/2"SCH40 2-½" 2.469 2.875 0.203 73.096
3"SCH40 3" 3.068 3.500 0.216 95.591
4"SCH40 4" 4.026 4.500 0.237 136.152
 
SCHEDULE 80 – ASTM D2447/F2160/NEMA TC-7 EPEC-80
1/2"SCH80 ½" 0.546 0.840 0.147 13.728
3/4"SCH80 ¾" 0.742 1.050 0.154 18.595
1"SCH80 1" 0.957 1.315 0.179 27.403
1-1/4"SCH80 1-¼" 1.278 1.660 0.191 37.811
1-1/2"SCH80 1-½" 1.500 1.900 0.200 45.818
2"SCH80 2" 1.939 2.375 0.218 63.368
2-1/2"SCH80 2-½" 2.323 2.875 0.276 96.667
3"SCH80 3" 2.900 3.500 0.300 129.370
4"SCH80 4" 3.826 4.500 0.337 189.059
 
NEMA TC-7 EPEC A
1/2"TC7 ½" 0.546 0.840 0.060 6.307
3/4"TC7 ¾" 0.930 1.050 0.060 8.005
1"TC7 1" 1.165 1.315 0.075 12.533
1-1/4"TC7 1-¼" 1.460 1.660 0.100 21.023
1-1/2"TC7 1-½" 1.670 1.900 0.115 27.663
2"TC7 2" 2.085 2.375 0.145 43.575
2-1/2"TC7 2-½" 2.469 2.875 0.203 73.096
3"TC7 3" 3.068 3.500 0.216 95.591
4"TC7 4" 4.026 4.500 0.237 136.152