Our welded steel pressure pipe is manufactured per the AWWA C200 Standard and mortar-lined in accordance with AWWA C205 for maximum durability. It’s available with either a polyurethane coating (per AWWA C222) or a three-layer tape system coating (per AWWA C214). Longer lengths (up to 50 feet) result in fewer joints and faster installation.
Welded steel pipe is designed for internal pressure using the hoop stress formula. For external loads and as a flexible pipe, steel pipe is designed using the Iowa equation to estimate and limit pipe deflection. For handling purposes, minimum wall thickness should be considered to ensure limited deflection and damage during pipe handling.
Steel pipe is designed in accordance with AWWA Manual M11. The basis of the design provides a safety factor comparable to other waterworks pipe materials for normal service conditions and surge or water hammer. The stress in the steel components at working pressure is limited to one half the yield strength of the steel.
The methods used for producing steel pipe were introduced in the early 1850s and have evolved into the modern processes we use today.
Thompson Pipe Group offers two primary types of steel pipe joints: the rubber gasket joint and the lap-welded joint. The rubber gasket joint is Thompson Pipe Group’s standard joint for small diameter steel pipe. For larger diameter pipe, Thompson Pipe Group uses the lap-welded joint.
Water transmission and distribution lines
Process lines in water and wastewater treatment plants
Industrial process lines.