{"data":{"id":"us/46-cfr-153.556","jurisdiction":"us","citation":"46 CFR 153.556","heading":"Special requirements for sulfuric acid and oleum.","body":"(a) Except as prescribed in paragraphs (b) and (c) of this section, containment systems carrying sulfuric acid, oleum, or contaminated sulfuric acid are approved by the Commandant (CG-ENG) on a case by case basis.\n(b) A containment system carrying sulfuric acid may be:\n(1) Made of unlined steel if the cargo composition is between 70 and 80 or between 90 and 100 percent acid by weight;\n(2) Lined with lead if the cargo composition does not exceed 96 percent acid by weight; or\n(3) Lined with natural rubber or neoprene if the cargo composition does not exceed 51 percent acid by weight.\n(c) A containment system for oleum may be of unlined steel if the concentration of free sulfur trioxide in the oleum exceeds 20 percent by weight.","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":"18bb69cf93281bad89cf5b37b67adf791c338171555722e43c9222666d0e2edf","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-153.555","next":"us/46-cfr-153.557"},"notice":"GroundRules: Original legal text. Not legal advice."}