The ISO (International Organization for Standardization) and ASTM (American Standards and Testing Materials) International standards have historically evolved independently of each other. When there was no conflicting engineering or manufacturing differences, this separation did not present any issues to the design, manufacturing or specify community. This situation, however, does not exist when it pertains to corrugated HDPE (High Density Polyethylene) and PP (Polypropylene) storm and sanitary sewer pipe. The ISO standards try to address this product as a modification of solid wall HDPE and PP pipe with stiffening ribs. The ASTM standards, on the other hand, address each HDPE and PP product as a wholly unique manufacturing product with distinct engineering and design properties. With corrugated HDPE and PP becoming one of the predominate products in the world, the ISO standards have effectively eliminated the use of this product in many markets. This paper addresses the short comings in both standards and the need to modify specifically the ISO standards to address the engineering requirements, which are necessary for the successful long-term performance of corrugated HDPE and PP pipe.
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