Welded steel pipe provides a very effective way to transfer liquids and air. Steel Pipe is pound per pound stronger than any other type of pipe. Pipe can be designed to handle both internal and external pressures of most applications. Welded steel pipe offers many advantages, such as: strength, economy, lightweight and ease of installation. Skyline Steel is SPFA certified and manufactures hydrotested pipe for a variety of applications. We produce 10-3/4" OD – 90" OD hydrotested pipe using a Double Submerged Arc Weld process in both Spiralweld and Rolled & Welded Pipe. Hydrotested pipe lengths range from 30' – 60', wall thickness from .250" – 2.0" wall and produced per AWWA C200/ ASTM A139/ASTM A134.