Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The latest general information on the Coronavirus (COVID-19) is available on Coronavirus.gov. For PHMSA contact information during the COVID-19 health emergency, please visit our page.

United States Department of Transportation United States Department of Transportation

DOT FRP-2 Standard, Basic Requirements For Fiber Reinforced Plastic Type 3HW Composite Cylinders

January 14, 1987

This is the basis requirements (standard) by OHM for design, construction and manufacturing Hoop wrapped Fiber Reinforced Composite (HW) Cylinders (FRP-2).

Key Words: composite cylinder, E glass, S glass, cycling, fiber stress, aluminum liner, hoop, hoop wrapped


If you have any technical questions not addressed by this or associated documents, contact Mark Toughiry, 202-366-4545.

Last updated: Monday, November 27, 2017