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The ASTM standard for vertical polyethylene storage tanks, and what it means when you compare tanks.
ASTM D 1998 is the American Society for Testing and Materials standard for rotationally molded vertical polyethylene storage tanks over 500 gallons. It applies to tanks made from crosslinked polyethylene (XLPE) and non-crosslinked polyethylene (HDPE), with closed or open tops.
The standard sets minimum wall thicknesses based on the tank’s height, outside diameter and specific gravity rating, and it builds in a significant safety factor by using conservative values for resin properties.
Bailiff-molded HDPE vertical tanks of 500 gallons and larger, including double wall tanks built only from Bailiff-molded tanks, are built to ASTM D 1998-21 wall thickness specifications. Each tank’s detail page shows this when it applies.
Two tanks can look alike while one has thinner walls. When you compare quotes, ask whether each vertical polyethylene tank meets ASTM D 1998.
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