This specification covers the requirements for five classes (based on density) of flexible polyurethane foams of the polyester type, in the form of blocks, slabs, sheets, and shapes cut from these. Each class is subdivided, according to the hardness of the foam, into two grades.
NOTE
a) The title of the standard referred to by number in the specification is given in appendix A.
b) Requirements that must be specified by the purchaser are listed in appendix B.