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The Northern Pipe Products Inc. unique coupling design originated from years of research and the integration of designs from the United States, Canada and Europe. As a result, our design engineers have developed a product that now gives the customer a bell and spigot that easily interlocks without the need for external couplers.
The Northern Pipe Products Inc. Dual Wall advantage doesn't stop there. Every piece of Dual Wall includes a gasket that meets all ASTM F-477 standards. While other manufacturers may charge for this feature, Northern Pipe Products Inc. provides it as standard equipment.
Our pipe and gasket system provides you with a sealed, watertight joint every time. The strength of our rib design and its sleek, smooth interior creates a strong, durable product while our exceptional inner wall allows for maximum hydraulic flow.
Corrugated Pipe Fittings >>
NPP DUAL WALL*
| DIA |
PART NUMBER |
LENGTH |
WT/FT LBS |
| 4" |
204 |
20' |
0.45 |
| 6" |
206 |
20' |
1.09 |
| 8" |
208 |
20' |
1.68 |
| 10" |
210 |
20' |
2.30 |
| 12" |
212 |
20' |
3.38 |
| 15" |
215 |
20' |
4.78 |
| 18" |
218 |
20' |
7.19 |
| 24" |
224 |
20' |
12.25 |
| 30" |
230 |
20' |
15.40 |
| 36" |
236 |
20' |
19.25 |
| 42" |
242 |
20' |
26.50 |
| 48" |
248 |
20' |
31.00 |
*NPP EXCEEDS THE FOLLOWING SPECIFICATIONS FOR DUAL WALL
AASHTO M-252 and M-294
ASTM F-405 and F-667
MANNING'S "N" VALUE =.012
NPP DUAL WALL PE SPECIFICATIONS
| ID |
OD |
PITCH (INCHES) |
CROWN HT (INCHES) |
WT/FT (LBS) |
WT/FT (GRAMS) |
MIN. STIFFNESS @ 5% DEFLECTION (PSI) AASHTO |
MIN. STIFFNESS @ 5% DEFLECTION NPP* |
| 4" |
4.73 |
0.647 |
0.345 |
0.453 |
206 |
50 |
102 |
| 6" |
6.87 |
0.776 |
0.476 |
1.09 |
495 |
50 |
64.4 |
| 8" |
9.1 |
0.97 |
0.654 |
1.68 |
763 |
50 |
68.7 |
| 10" |
11.75 |
1.3 |
0.898 |
2.34 |
1044 |
50 |
55 |
| 12" |
14.4 |
1.94 |
1.12 |
3.38 |
1535 |
50 |
56.7 |
| 15" |
17.46 |
2.58 |
1.23 |
4.79 |
2175 |
42 |
47.5 |
| 18" |
21.05 |
2.58 |
1.52 |
7.19 |
3264 |
40 |
51.7 |
| 24" |
27.64 |
3.1 |
1.86 |
12.25 |
5562 |
34 |
47.2 |
| 30" |
36 |
3.9 |
2.47 |
15.4 |
6992 |
28 |
31 |
| 36" |
42 |
5.2 |
2.85 |
19.25 |
8740 |
22 |
24 |
| 42" |
48 |
5.2 |
2.88 |
26.5 |
12031 |
21 |
22 |
| 48" |
54 |
5.2 |
3.15 |
31 |
14074 |
18 |
20 |
*Values are results from independent testing by Patzig testing Laboratories.
NPP MEETS OR EXCEEDS THE FOLLOWING STANDARDS
1. ASTM F-405 Corrugated PE Pipe & Fittings
2. ASTM F-667 Large Diameter Corrugated PE Pipe & Fittings 8" - 24"
3. AASHTO M-252 Corrugated PE Drainage Pipe
4. AASHTO M-294 Corrugated PE Pipe 12" - 24"
5. SCS Code 606 - Standard Practice for Subsurface Drain
6. ASTM F-447 - Elastomeric Seals (Gaskets) for Joining Plastic Pipe
7. NPP Brown Book of Quality Assurance and Testing Standards |
Note: The pipe properties and dimensions shown are the best estimates which may change according to the material and extruder used.
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