ASTM D7570-17 PDF Download

When pile floor coverings are subjected to various levels of moisture and heat, the ASTM D7570-17 standard provides a method for assessing the possible dimensional changes and deformations. As variations in dimensions can affect the appearance and functionality of the product, this test method is crucial for quality and cost control throughout the production of pile yarn floor coverings.

Given that the estimations of between-laboratory precision are acceptable and this test method is often used in the trade for this purpose, the standard declares that it is suitable for acceptance testing of commercial shipments. Comparative tests should be run if there are notable discrepancies in test findings between two or more laboratories to ascertain whether there is a statistical bias. In these situations, samples ought to be taken from the same batch of material and ought to be as homogeneous as feasible. To find and correct any bias, the lab findings should be evaluated using a statistical test for unpaired data with a predetermined probability level.

This test procedure is intended primarily for floor coverings created from machine-made pile yarn and is suitable for all varieties of pile floor coverings, including carpet modules.