HEL-COR corrugated metal pipe (CMP) is used in drainage, culverts, storm sewers, canals, and stormwater detention applications. HEL-COR is available in a large variety of materials, coatings, and sizes to meet site specific needs, and HEL-COR’s continuous locked seams and annular corrugated ends allow for a variety of standard couplings to be used.

Find your local Contact

Our local contacts are experts who are ready to help

Corrugated Metal Pipe for Storm Sewers, Culverts, Small Bridges, and Stormwater Systems

HEL-COR® helically corrugated metal drainage pipe provides the power to withstand severe environmental conditions and burial depths associated with drainage systems, culverts, storm sewers, and stormwater detention systems.

HEL-COR service life exceeds 100 years with proper specification that meets all AASHTO and ASTM pipe specifications, and it can handle fill heights in excess of 100 feet.

A wide choice of coatings including galvanized steel, aluminized steel type 2 (ALT2), and polymer-coated steel are available to meet a variety of durability requirements. A variety of wall thicknesses (gages), corrugations, diameters, and pipe section lengths permit a choice of materials to meet specific job site requirements.

Standard fittings include tees, wyes, elbows, saddle branches, reducers and manifolds for detention systems. Manholes and catch basins can be fabricated to meet specific job requirements. HEL-COR is manufactured with continuous locked seams with annular corrugated ends enabling the use of a variety of standard couplings including soil-tight HUGGER® Bands and QUICK STAB® Joints.

HEL-COR Pipe Features and Benefits

Long service life Exceeds 100-years with proper specification that meets all AASHTO and ASTM pipe specifications
Strength Can handle fill heights in excess of 100 feet
Versatile Available in a wide variety of shapes and sizes; diameters from 6 inches to 15 feet
Flexible Forgiving during the rigors of installation and allows for steep slope applications
Lightweight Easier and less expensive to install than concrete pipe

HEL-COR Pipe Coatings

  • Galvanized Steel - Corrugated galvanized pipe made from steel coated with zinc to extend service life. The most widely used and most economical metallic coating for corrugated steel pipe.
  • Aluminized Steel™ Type 2 - Pipe made from steel that has been hot-dipped in commercially pure aluminum; offers 75 years or more of maintenance free service life.
  • Polymer-Coated - Pipe made from steel with a heavy-gage polymer coating; protects against abrasion and corrosion to provide at least 100 years of service life with a guaranteed 80-years “add-on” according to the 2012 Polymer Coated CSP Study performed by the NCSPA.
  • Asphalt Coated - Steel pipe coated with asphalt for prolonged service life; and can also be used to improve hydraulics.

HEL-COR Pipe Properties

  • Diameter range 12” – 144”
  • Wall thicknesses of 18, 16, 14, 12, 10 and 8 gage
  • Available with helical or annular corrugations
  • 1-1/2” x 1/4” and 2-2/3” x 1/2” corrugations for economical and efficient metal use in small diameters
  • 3” x 1” and 5” x 1” offer high sectional properties in large diameter pipe
  • Standards lengths are 20’- 40’

HEL-COR Pipe Shapes

  • Full Round - recommended for most applications
  • Pipe –Arch - low, wide pipe-arch design distributes the area horizontally to provide adequate capacity without raising the grade

HEL-COR Pipe Accessories

HEL-COR Pipe Applications

  • Drainage culverts, canals, and ditch enclosures
  • Storm sewers and drainage pipe
  • Stormwater detention and infiltration
  • Rehabilitating sanitary sewers, storm sewers, and small culverts
  • Wind turbine foundations and vertical shafts

Technical information for this product is centrally located in the technical guides section.

View Technical Information
CMP Pipe for Wind Turbine Foundations and Vertical Shafts

Contech large-diameter CMP is used as a deep foundation form at the base of the windmill. CMP is placed vertically to act as a form for the poured-in-place concrete foundation.

CMP for Culverts, Canals and Ditch Enclosures

Our corrugated metal pipe is the most durable, economic, and widely chosen material for most drainage culverts applications. With a variety of CMP products including helically corrugated HEL-COR® and spiral wound ULTRA FLO®, Contech offers engineers and contractors flexibility in designing drainage solutions to best fit their projects’ exact requirements.

CMP and PVC Pipe for Pipe Reline

Lining inadequate or failing structures with corrugated metal material or plastic pipe uses little of the available area, thereby preserving the maximum amount of the original opening. Due to the hydraulic efficiency of Contech products, often a smaller structure provides the same hydraulic capacity as the original because of the low Manning “n” factors of A-2000™ and A2™ Liner PVC pipes and HEL-COR® and ULTRA FLO® CMP. Existing culverts and arches are generally lined with structures of the same shape, though slightly smaller in size. Rectangular openings can be lined with round, elliptical or pipe arch structures. Corrugated metal structures can fit almost any existing shape.

The Contech Advantage

Agency/Regulatory Guidance

Our team is ready to provide you with expert advice and assistance on local regulatory requirements, resulting in faster approvals.


Solution Development

Our engineers can review your requirements, weigh all options, and recommend the optimal solution to integrate with your site designs.

Technical Expertise

Our engineers can assist by providing product specific engineering calculations such as hydraulics, buoyancy, foundation reactions, and unit sizing.

Cost Estimates

We can quickly provide engineer’s cost
estimates to assist with your solution
selection process.

Site Specific Drawings

Our engineers can provide site-specific drawings for proposals, project meetings, and submittals, helping you be more efficient with your time.

On-site Assistance

Contractors know time is money, so we provide preconstruction meetings, delivery coordination, and on-site installation support to ensure a timely, smooth installation.