Metal Pipe (CMP)

Currently, NTPEP is auditing Corrugated Metal Pipe manufacturers, which includes conformance sample testing. Audit and test protocols are described in the “Project Work Plan.” All audit requirements conform with the latest version of AASHTO Standard Specification M 36. The Work Plan can be found by clicking on “Documents” on the right side menu of this web page.

The NTPEP Technical Committee responsible for authoring the Project Work Plan convenes yearly at the  NTPEP Annual Meeting. During this working meeting, the Project Work Plan is discussed, changes made, and shortly thereafter balloted for adoption. Improvements are immediately implemented in the next available audit tour. When compared to other standards development exercises, the NTPEP process is agile, effective and efficient.​

NTPEP Designated Lab:

  • Missouri Department of Transportation

NTPEP - Metal Pipe

Committee Name:
NTPEP-Technical Committee on Corrugated Metal Pipe
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Work Plan

NTPEP tests products according to a Project Work Plan, which describes the laboratory and/or field test protocols used to conduct the evaluation. The Project Work Plan is a consensus-based document, and includes peer review and input from industry experts. Each Project Work Plan is adopted after receiving at least two-thirds affirmative support from 52 AASHTO member states. The Project Work Plan is the basis for host states to conduct their testing and evaluation. When implemented by state DOTs, their own state standard specifications may supersede the NTPEP Project Work Plan. Industry is advised to be aware of state-level requirements, which may supersede basic NTPEP testing.

NTPEP Committee Work Plan for​ Evaluation of Corrugated Metal Drainage Pipe​​ (CMP-20-01)

User Guide

CMP User Guide

Please go to NTPEP DataMine.

Please go to NTPEP DataMine.

Industry Resources

Associations that would like to be affiliated with the NTPEP Corrugated Metal Pipe program should contact Matt Bluman ( for additional information.