{"data":{"id":"us/40-cfr-60.681","jurisdiction":"us","citation":"40 CFR 60.681","heading":"Definitions.","body":"As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part.\nGlass pull rate means the mass of molten glass utilized in the manufacture of wool fiberglass insulation at a single manufacturing line in a specified time period.\nManufacturing line means the manufacturing equipment comprising the forming section, where molten glass is fiberized and a fiberglass mat is formed; the curing section, where the binder resin in the mat is thermally “set;” and the cooling section, where the mat is cooled.\nRotary spin means a process used to produce wool fiberglass insulation by forcing molten glass through numerous small orifices in the side wall of a spinner to form continuous glass fibers that are then broken into discrete lengths by high velocity air flow.\nWool fiberglass insulation means a thermal insulation material composed of glass fibers and made from glass produced or melted at the same facility where the manufacturing line is located.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 60—STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES","Subpart PPP—Standard of Performance for Wool Fiberglass Insulation Manufacturing Plants"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"bb768908541dc7bdd2990e368fc6774fefa152e27f6a8d218faaf5b25ff67476","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-60.680","next":"us/40-cfr-60.682"},"notice":"GroundRules: Original legal text. Not legal advice."}