N-12 Dual Wall HDPE Pipe & HP Storm Dual Wall PP Pipe
N-12® Dual Wall - HDPE Pipe
Corrugated, smooth interior, high-density polyethylene (HDPE) pipe
Introduced in 1987, dual wall N-12 pipe, with its smooth interior wall and corrugated exterior, offers exceptional hydraulics and strength. Built using application-specific high-density polyethylene, dual wall N-12 corrugated pipe also provides superior corrosion and abrasion resistance. This makes it an excellent alternative to reinforced concrete (RCP) and corrugated metal pipe (CMP).
N-12 pipe is available in soil tight (ST), water tight (WT) and plain end, all of which offer joint options of bell and spigot design, gasket, bell wrap or pressure-rated 10.8 psi coupler.
- Smooth interior with a Manning's value of 0.012 resulting in increased flow capacity
- Inert HDPE material is resistant to the effects of chemicals, abrasion, hot soils, and effluent
- Lightweight product for best-installed cost and maximizing delivery and installation efficiencies
- Structurally designed corrugated exterior to support typical construction and long term loading
- Joint options to meet your application performance requirements, including up to water-tight joints meeting ASTM D3212
- Joint options include bell and spigot design, gasket, bell wrap or pressure-rated 10.8 psi coupler
HP Storm - Dual Wall - PP Pipe
Corrugated smooth interior polypropylene (PP) pipe
HP Storm is a high-performance polypropylene (PP) pipe for gravity-flow storm drainage applications, and the perfect choice when premium joint performance and/or greater pipe stiffness is required. This pipe couples advanced polypropylene resin technology with a proven, dual-wall profile design for superior performance and durability. The smooth interior wall offers additional strength as well as superior flow. HP Storm offers up to 100 percent greater pipe stiffness over traditional plastic pipe, which increases safety and service life in installations that demand high performance. The extended bell and spigot joint design adds an additional factor of safety within each joint to ensure watertight performance and long term design service life.
HP Storm pipe meets or exceeds ASTM F2881 and AASHTO M330. From a federal perspective, polypropylene (PP) pipe is approved for use by the Army Corps of Engineers for storm drainage applications under Section 33 40 00 (Unified Facilities Guide Specifications). The Federal Aviation Authority (FAA) permits polypropylene pipe under airfield pavements per Item D-701 and as pipe for storm drains and culverts in AC 150/5370-10G (Standards for Specifying Construction of Airports). Additionally, the American Railway Engineering and Maintenance-of-Way Association (AREMA) approves polypropylene pipe in storm drainage applications under railroads.
- Increased stiffness results in an additional safety factor against construction loading and poor installations
- The extended bell and spigot joint meets ASTM D3212 and ensures lab and field testable watertight performance
- Smooth interior with a Manning's value of 0.012, resulting in increased flow capacity
- Inert PP material is resistant to the effects of chemicals, abrasion, hot soils, and effluent
- Lightweight product for best installed cost to maximize delivery and installation efficiencies