Guidanceguidance
13-0013
Global Products and Services, Baker Hughes — Hazardous Materials Safety Interpretation
Current as of source date Government source
RegulusPipeline researchRegulusPipeline research13-0013
Page 1U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration 1200 New Jersey Avenue, SE Washington, D.C. 20590 APR 1 0 2013 Mr. Aubrey R. Campbell Senior Dangerous Goods Safety Advisor Global Products and Services, Baker Hughes 2001 Rankin Road Houston, TX 77073 Ref No. 13-0013 Dear Mr. Campbell: This responds to your December 10, 2012letter requesting clarification ofthe Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to accumulators. In your letter, you describe and provide a picture illustrating two accumulators that are part of a "Thumper Unit" that is used at well drilling sites as an integral component of the oilfield operation. Each accumulator is offered for transport pre-charged with nitrogen gas to a maximum pressure of2,000 psig (at 70°F). Additionally, each has a manufacturer's burst pressure rating of 12,000 psig, which is six times greater than the maximum pre-charged pressure. Based on this information, it is your understanding that the "Thumper Unit" is excepted from the requirements of the HMR as specified in§ 173.306(f). Your understanding is correct. In accordance with § 173 .306( ±)(1 ), accumulators installed in motor vehicles, construction equipment, and assembled machinery and designed and fabricated with a burst pressure of not less than five times their charged pressure at 70 °F., when shipped, are not subject to the requirements of the HMR. Based on the information you provided, the "Thumper Unit" meets the conditions for exception from the HMR. I hope this information is helpful. If you have further questions, please contact this office. Sincerely, ;?425~ Robert Benedict Chief, Standards Development Branch Standards and Rulemaking Division#
Page 2ber ~w1~~V1 .SI/3 .3o[Jf~) Accumulaforr l:? -DO l3 fl:t:~:<cJ BAKER HUGHES 2001 Rankin Road Houston, TX 77073 Phone: (713) 879-2658 December 10, 2012 Office of Hazardous Materials Standards Pipeline and Hazardous Materials Safety Administration, Attn: PHH-10 U.S. Department of Transportation East Building, 1200 New Jersey Avenue, SE Washington, DC 20590-0001 Re: Letter of Interpretation Dear Office of Hazardous Materials Standards: Baker Hughes, Inc. (BHI) requests a letter of interpretation regarding the provisions in Title 49 Code of Federal Regulation (CFR) Part 173.306(f)(1) applicable to limited quantities of compressed gases. Specifically, BHI offers an accumulator called the "Thumper Unit" for transport with Nitrogen compressed gas, 2.2, pre-charged to a maximum of 2000 psig. The Thumper Unit (see attached photo) is used at oil and natural gas well sites as an integral component of the oilfield operation. The manufacturer's burst pressure rating on each accumulator cylinder (2) in the Thumper Unit is 12,000 psig {see attached specification sheet.) We calculated the burst pressure as six times greater than the maximum pre-charged pressure at 70 degrees. Given this calculation, we understand that the Thumper Unit, as described, is excepted for all requirements of subchapter C according to Part 173.306(f)(1). Please provide clarification of this determination. Sincerely, Senior Dangerous Goods Safety Advisor Global Products and Services, Baker Hughes#
Page 4090A80 Accumulators a,ooo Psi t2o7 aar) 'Tobul r ~~;~~~----------_G_--~-~--.-~-AP._'A_C_ITY--+-F-LU-ID_c_Ar-·P._'A~C-ITY~~~~D~RY~-,WE--~-I~G~HT~~~~~~~-~A~-~D~I--M_E=N~S~IO~N----~_,B,_.------------=-1 Gallon I Liters Lbs. Kg. ln. mm. ln. mm. l 090A30-20NV1K ! 612 10,030 2.5 l 9 192 87 22 559 23.25 591 I 090A30-40NV1K 1,191 19,515 5 19 ' 256 ' 116 34.625 879 35.875 912 i 090A30-60NV1K 1.765 28,925 7.5 28 320 145 47.25 1200 48.5 1,232 i ---~--------1----+---~r-----+----1-----+-----+-----~--~ I 090A30-80NV1K l 2,347 38,465 10 38 385 175 60 1524 61.25 1,556 i lo9oA30-100NV1K I 2,918 47,819 12.5 47 448 203 72.5 1841 73.75 1,873 I j 090A30-120NV1 K l 3,495 ·-5-7·,-26-6--+ 1---15-+--5-7--ir-5-13-~2-3-2--+-8-5-.1-25-t--21_6_2 -t--8-6.-37-5-+-2-, 1_9_4___, 1----------+-----+----+----·-~~----+----+-----t-------+---+------l-----------l 090A30-140NV1K I 4,071 66,713 17.5 66 576 I 261 97.75 2483 ' 99 2,515 :----------- ---·-------+----+-------!·-------+ -----~-----tf--------t-------i 090A30-160NV1K : 4,648 76,160 20 76 641 291 110.375 2804 111.625 2,835 ; . ---+----"·-------------------- ---·--·--!---·---+----+------ ····· -----+----+- ti90A30-200N:'1KII, 5,806 95,148 25 95 770 349 I 135.75 3499 137 3,480 ~90A30-240NV1K : 6,959 114,042 30 114 898 407 161 4089 162.25 4,121 I l 090A30-320NV1K I 9,265 151,831 40 I ~151 1,154 523 211.5 5372 212.75 5,404 L~90A3E~-~~~~ 11 ,571 189_,6_19 ___ _,___5_0 __ _,___1 8_9____c_1 ,4_1_1 _ ___,__ ____ 6_4_0 ___ -<-~2_6 __ 2____, ____ 6~6_55_~..__26_3_.2_5 __,__6_,6_87____,1 ---------A -----B----___ __, _ __,, -L-1-1/4" (32mm) I SAE2" 4-BOLT l 9" DIA · J ' 1 , ., (229mm) !· hI . ~'·· , : -. -, ~ I ' -. '"' ·,,~''·,--.,, I J~"f--L~-~L..li/'---'/ :LlJL' c..." <L.L.! .....2:\-~:- - - ~ ~ / ~ -,,_ ~.. )·""'-) ~ ,.,.--..,//<.--.....,./ / ,r:-:-,;/ ,...-..c,> \.,~) (,~/. (~Q) (!!) (1f) lj_~) (.~~) GENERAL DESIGN DATA MAXIMUM WORKING PRESSURE .................................................................................. 3,000 PSI MAXIMUM PROOF PRESSURE ........................................................................................ 4,500 PSI MINIMUM BURST PRESSURE ......................................................................................... 12,000 PSI (207 Bar) (310 Bar) (827 Bar) OPERATING TEMPERATURE (Buna/Nitrile) ........................................................ -20° TO +200° F (-28~ to 939 C) STANDARD SEAL MATERIAL FOR PETROLEUM BASE OIL. SEALS AVAILABLE FOR OTHER FLUIDS. NOTE: Optional porting/mounting configurations available on request 090A30_1112 Phone: 803-245-5111 Fax: 803-245-2838 Tobul Accumulator, Inc. Bamberg, sc USA www.Tobul.com#
Page 5080A30 Accumulators a,oooPSI(2o7aar> 'Tobul 090A30 SERIES PARTS BREAKDOWN (CATALOG STANDARD 090A30·*NV1K) -- 11TEM NO. PART NO. DESCRIPTION NO. REQ'D ' 1 HG61MB23-K HEAD, FLUID, 2" SAE 4 BLT CODE 61 1 2 SB4T112 I SEAL, BACKUP, TEFLON 2 ~ 3 S04N112 SEAL, 0-RING, HEAD, BUNA-N 2 C72TA61-176 CYLINDER, 090A30-20, 2.5 GALLON, 9 LITER C72TA61-277 CYLINDER, 090A30-40, 5 GALLON, 19 LITER C72TA61-378 CYLINDER, 090A30-60, 7.5 GALLON, 28 LITER C72TA61-480 CYLINDER, 090A30-80, 10 GALLON, 38 LITER I C72TA61-580 CYLINDER, 090A30-100, 12.5 GALLON, 47 LITER I C72TA61-681 CYLINDER, 090A30-120, 15 GALLON, 57 LITER 4 ; 1 ! C72TA61-782 CYLINDER, 090A30-140, 17.5 GALLON, 66 LITER I ! C72TA61-883 CYLINDER, 090A30-160, 20 GALLON, 76 LITER C72TA61-1 086 CYLINDER, 090A30-200, 25 GALLON, 95 LITER C72TA61-1288 CYLINDER, 090A30-240, 30 GALLON, 114 LITER C72TA61-1692 CYLINDER, 090A30-320, 40 GALLON, 151 LITER C72TA61-2096 CYLINDER, 090A30-400, 50 GALLON, 189 LITER 5 P61MH33T PISTON, ALUMINUM 1 6 SB4T113 SEAL, BACKUP, TEFLON 6 ST4N114 SEAL, PISTON, "T'' SEAL, BUNA-N 3 7 3A-175 BALL, CHECK VALVE 2 S01V.114 SEAL, 0-RING, CHECK VALVE, VITON® 2 8 3A-24 SCREW, RETAINING, CHECK VALVE 2 4A-135 SPRING, CHECK VALVE 2 9 NP-300 NAMEPLATE 1 10 HG61MB23-1 HEAD, GAS, Y2-20 1 OPT DR-ASSY-32 RUPTURE DISK ASSM (OPTIONAL) 3200 PSI 1 12 B-.37GB 16S6-B BOLT, CARBON STEEL, 3/8-16 x% 2 13 3A-283 SS VALVE, GAS, 3K, V2-20 UNF-3A 1 14 3A-754D GUARD, VALVE, ALUMINUM 1 -- ---~' (*DENOTES INSERTION POINT FOR UNIT VOLUME DESIGNATION, i.e., 80 = 10 GALLON VOLUME) COMPLETE SEAL KITS NEW PART NUMBER TYPE OLD PART NUMBER SK090A30-NT BUNA-N 9A30-G40T-NST SK090A30-VT VITON® 9A30-G40T-ETI SK090A30-ET EPR 9A30-G40T-HTI Specify seal material by selecting appropriate material code- "N"= Buna-N; "B"= Butyl; "E"= EPR; "V"= FKM (Viton®) 090A30_1112 Phone: 803-245-5111 Fax: 803-245-2838 Tobul Accumulator, Inc. Bamberg, sc USA www.Tobul.com#
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