Krah Structured Pipe
Krah structured HDPE pipe made with the exclusive Krah mandral technology.
Krah Pipes are manufactured with high-quality polyethylene materials, typical composition is 100% virgin HDPE with a cell classification of PE445574C. This high-density, polyethylene material provides excellent properties for water and sewer application. ASTM D-3350 classification considers density, melt index, flexural modulus, tensile strength at yield, slow crack growth resistance, and hydrostatic strength.
Since 1968, Krah has been at the forefront of developing and manufacturing Krah helical extrusion pipe production technology in Germany. In 2020, KrahUSA expanded its operations to Prineville, Oregon, and started production of the same high-quality extrusion pipes. This development marked a significant milestone as it established KrahUSA as the sole provider of extruded, spiral wound pipes in the United States.
Krah’s production technology employs a helical extrusion (spiral wound) process capable of manufacturing a variety of pipes, including profiled pipes for gravity applications, solid wall pressure pipes, and specialized wall structures for producing fittings, manholes, and accessories. Thanks to continuous technological advancements and ongoing development efforts, Krah Pipes can now be produced with a seamless, smooth, and inspection-friendly inner surface. Additionally, these pipes feature integrated socket spigots suitable for electro fusion jointing and other types of joining technologies. This production method offers the flexibility to design pipes that are customized and cost-effective, specifically tailored to meet the demands of various applications through innovative wall structures.
The Krah pipe system is designed to meet the requirements of both standard pipes and engineered, tailor-made pipe systems, ensuring it can accommodate a wide range of needs and applications.