{"data":{"id":"us/46-cfr-153.407","jurisdiction":"us","citation":"46 CFR 153.407","heading":"Special requirements for sounding tube gauges.","body":"(a) A sounding tube installed as a restricted gauge must extend to within one meter (approx. 39.4 in.) of the bottom of the tank.\n(b) A sounding tube must not be installed on a tank whose relief valve setting exceeds 28 kPa (approx. 4 psig) unless it is specifically permitted by the Commandant (CG-ENG).\n(c) A sounding tube must have no perforations in the tube wall.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER O—CERTAIN BULK DANGEROUS CARGOES","PART 153—SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS","Subpart B—Design and Equipment"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-46.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:22Z","sha256":"7353bbcedba32829d832d251b160f010e92c355989516c28bb2f25886b9b6e16","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-153.406","next":"us/46-cfr-153.408"},"notice":"GroundRules: Original legal text. Not legal advice."}