{"operation":"document","citation":"98-0217","title":"Polar Service Centers — Hazardous Materials Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"1998-09-04","effective_on":null,"summary":"98-0217 response to Polar Service Centers concerning 172.102.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-98-0217.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-98-0217.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-98-0217","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/1998/980217.pdf","body":"<<<PAGE 1>>>\n\n-\n•\nU.S. Department\nof Transportation\n400 Seventh Street, S.W.\nWashington, D.C.\n20590\nSEP - 4 1998\nMr. Mark Hughes\nPolar Service Centers\nReference No. 98-0217\n120 Cedar Spring Road\nSpartanburg, SC 29302\nDear Mr. Hughes:\nThis is in response to your letter of July 30, 1998, regarding a suitable corrosion allowance for sulfuric\nacid in MC 307 cargo tanks under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-\n180). Specifically, you ask whether an MC 307 cargo tank, with a minimum shell thickness of .172\ninches and a shell diameter of 50 inches, has a suitable corrosion allowance for sulfuric acid in\nconcentrations up to 65.25 percent.\nThe answer is yes. An MC 307 cargo tank having a minimum sheil thickness of .172 inches and a shell\ndiameter of 50 inches has a suitablé corrosion allowance for sulfuric acid or spent sulfuric acid in\nconcentrations up to 65.25 percent as specified in Special Provision B84 (§ 172.102).\nI hope this answers your inquiry. If we can be of further assistance, please contact us.\nSincerely,\nDelmer F. Billings\nChief, Standards Development\nOffice of Hazardous Materials Standards\n\n<<<PAGE 2>>>\n\nE7/31/1998 11:43\n8645834365\nPAGE 02/02\nPOLAR\n98-0217\n120 CEDAR SPRING ROAD\nTELEPHONE: 864573-0315\nSPARTANGUAG, 3Ç 283DE\nGENVICE CENTERS\nTOLL FREE: 1-800-055-8556\nTELEFAX: 854S83-4385\nGeorge\n§ 172.101 (S)\nDabe July 30,1998\nSulfuric Acid\nDirector Office Hazardous Materials Standards\nUS DOT/RSPA DHM-10\n4007th Street, SW.\nWashington DC. 20590-0001\nSubject - MC 307 for Sulfuric Acid service\nDear Mr Edd Mazzullo\nAfter reviewing the above subject with one of your DOT specialist over the phone.\nI was told I conld request a written statement from your office regarding the subject. The\nspecifications are as follows, MC 307 - 4700Gal trailer that has passed all inspections per section\n• 180.407, with a min. shell and head thicknass of 172 inches, shell dia is 50\", ring spacing is 39\",\nshel material is 316 SS. Irailer is to be used in sulfuric acid service of more than 51 percent acid.\nAtter reviewing Hazardous Materials tablé, Special Provisions and Packaging Authorizations it\nstates that a NIC 307 with suitable corrosion allowance is approved for this service I refered to\nthe material thiokness charts for MC 312 to verify suitable corrosion allowance due to the fact\nthat the industry has always used MC 312 trailers to transport sulfuric acid and MC 307 does not\nshow sufficient thickness. The volume capacity in gatlons per inch is in the less than 10 range and\nthe product weight in pounds per gallon is in the 13 to 16 range therefore the minimum shell\nthickness stated in the table is 8 GA or decimal equivalent of .164 inches and a minimum in service\nthickness of .148 inches. Please advisc if the above subject unit is approved for sulfuric acid of\nmore than 51%.\nIf you require any further information please call mo at 1-800-955-8558 ext 4. Necding a\nresponse as quickly as possible thank you for your time.\nSincerely Yours\nMark Hughes\nBATON ROUGE. LA • HOUSTON, TX - MAFIETTA, OH - SPARTANBURG, 6C • STE. GENEVIEVE, MO • WEST CHESTEA, PA\nPRODUCTION FACILITIES IN OPOLE, MN. HOLDINBFORO, MN AND ERRINGFIELD, MO WITH SERVICE CENTERS IN","truncated":false,"body_characters":3206}