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Welcome & Overview

U.S. Steel, SeAH, and POSCO are proud to announce the creation of a new joint venture, United Spiral Pipe LLC., to produce high quality large diameter DSAW pipe primarily for the North American oil and gas industry. USP utilizes an advanced and automated two step process for making spiral welded pipe.  Our broad-size range, robust capacity, pipe-coating capabilities, and strategic location will make United Spiral Pipe a strong presence in the rapidly growing North-American line pipe market. 

POSCO and U.S. Steel, both world class steel makers, supply United Spiral Pipe with the highest quality hot rolled coils.  Our superior resources enable us to meet our customer's demands for pipe precision and integrity. The success of United Spiral Pipe is grounded in our core values of Safety, Quality, Customer Service, and Environmental Awareness. 

Welcome to United Spiral Pipe, LLC.

President                           Yeoung Tae Yoo

VP Admin & Finance         John Pentin

Email: Execs at United Spiral Pipe


On March 22, 2007 U.S. Steel, SeAH, and POSCO formed a joint venture to develop high-end DSAW custom steel line pipe facility. USP broke ground February 29, 2008. United Spiral Pipe is capable of producing 300,000 net tons of spiral welded pipe annually in diameters (OD) ranging from 24" to 64", wall thickness' from .281" to 1", and grades up to X80.

USP started commercial production in January 2010 and has completed three API 5L projects.