{"operation":"document","citation":"49 CFR 179.301","title":"Individual specification requirements for multi-unit tank car tanks.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"(a) In addition to § 179.300 the individual specification requirements are as follows:\n\nDOT specification 106A500-X 106A800-X 110A500-W 110A600-W 110A800-W 110A1000-W Minimum required bursting pressure, psig (1) (1) 1250 1500 2000 2500 Minimum thickness shell, inches 13⁄32 11⁄16 11⁄32 3⁄8 15⁄32 19⁄3","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-179-301.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-179-301.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-179-301","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-179.301","body":"(a) In addition to § 179.300 the individual specification requirements are as follows:\n\nDOT specification 106A500-X 106A800-X 110A500-W 110A600-W 110A800-W 110A1000-W Minimum required bursting pressure, psig (1) (1) 1250 1500 2000 2500 Minimum thickness shell, inches 13⁄32 11⁄16 11⁄32 3⁄8 15⁄32 19⁄32 Test pressure, psig (see § 179.300-16) 500 800 500 600 800 1000 Safety relief devices, psig (see § 179.300-15) Start-to-discharge, or burst maximum, p.s.i. 375 600 375 450 600 700 Vapor-tight, minimum psig 300 480 300 360 480 650 1 None specified.\n\n(b) [Reserved]\n\n[29 FR 18995, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 179-10, 36 FR 21355, Nov. 6, 1971; Amdt. 179-40, 52 FR 13049, Apr. 20, 1987; 65 FR 58632, Sept. 29, 2000; 66 FR 45390, Aug. 28, 2001]","truncated":false,"body_characters":792}