{"operation":"document","citation":"PI-09-0006","title":"State of Colorado Public Utilities Commission — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2009-02-20","effective_on":null,"summary":"PI-09-0006 response to State of Colorado Public Utilities Commission concerning 192.8.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-09-0006.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-09-0006.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-09-0006","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/2009/PI-09-0006.pdf","body":"<<<PAGE 1>>>\n\nU.S. Department\nof Transportation\nPipeline and Hazardous\nMaterials Safety\nAdministration\n1200 New Jersey Ave. S E\nWashington. DC 20590\nFEB 2 0 2009\nMr. Stephan Pott, PE\nChief, Gas Pipeline Safety\nState of Colorado Public Utilities Commission\n1560 Broadway, Suite 250\nDenver, CO 80202\nRef. No.: PI-08-0010\nDear Mr. Pott:\nThe Pipeline and Hazardous Materials Safety Administration (PHMSA) reviewed your\nDecember 11, 2008, letter transmitting an October 22, 2008, petition received by the Colorado\nPublic Utilities Commission (CO-PUC) from DCP Midstream for a finding that the endpoint of\nthe gathering designation for an intrastate gas pipeline should be extended beyond a gas\nprocessing plant. Specifically, DCP Midstream requested a finding that the gathering\ndesignation for a rural section of the ANGI intrastate pipeline be extended an additional 7.8\nmiles from the DCP Midstream Greeley Plant to the DCP Midstream Mewboum Gas Plant, both\nof which are located in Weld County, Colorado.\nPer 49 CFR § 192.8 (a)(2) and Section 2.2 (a)(I)(A) of API RP 80, DCP Midstream included\ndocumentation they feel demonstrates that extending the gathering designation an additional 7.8\nmiles from the Greely Plant to the Mewboum Plant was justified based on sound engineering\nprinciples.\nAdditional correspondence with DCP Midstream determined the following:\n• The Greeley Plant separates the methane out and sells it there; the liquids are placed in\ntanks at the facility and eventually transported to the intended destination via truck.\n• The remainder of the gas, including 90% ethane, 5% methane, and 2% C02 is then\ntransported to the Mewboum Plant for additional processing.\n• The normal operating pressure ofthe line is apPJ:oximately 300 psig, down to\napproximately 150 psig when delivered to the downstream plant\nBased on the information provided in DCP Midstream's petition, the additional correspondence,\nand your recommendation, PHMSA finds that extending the endpoint of the gathering\ndesignation for the ANGI gas pipeline an additional 7.8 miles to the Mewbome Plant is\nwarranted as long as the current operating parameters and operating pressures remain the same.\nAccordingly, to the extent this condition is met, PHMSA grants the petition. IfDCP Midstream\n\n<<<PAGE 2>>>\n\nPage 2\nMr. Stephan Pott, PE\nState of Colorado Public Utilities Commission -- ANGI Intrastate Pipeline\nRef. No.: PI-08-0010\nmakes any significant changes to the operation of this line, such as increasing the pressure to\nwhere the ethane might be in a liquid super critical phase, DCP Midstream will be required to\ncontact the CO-PUC and/or PHMSA's Western Region to make a new detennination.\nSincerely,\n\"--I Director, Office of Regulations\n\n<<<PAGE 3>>>\n\nPUBLIC UTiUTIES COMMISSION Department of Regulatory Agencies . -=\nD. Rico Munn • . . ,\nRon Binz, Chairman Executive Director i ~~ .,.\nJames K. Tarpey, Commissioner • , •\nMatt Baker, Commissioner\nDoug Dean, Director\nBill Ritter, Jr.\nGovemor\nDecember 9,2008\nMr. Jeffrey D. Wiese\nAssociate Administrator for Pipeline Safety\nU.S. Department of Transportation\nPipeline and Hazardous Materials Safety Administration, PHP-l\nEast Building, 2nd Floor\n1200 New Jersey Ave., SE\nWashington, DC 20590\nDEC 1 12008\nRE: Petition for Review-DCP Midstream\nANGI Pipeline\nOn October 22, 2008 DCP Midstream, a gathering and processing company operating in several\nproducing gas field in Colorado has, under § 190.9, petitioned the Public Utilities Commission\n(PUC), for a review of extending the endpoint of gathering beyond a processing plant. This\nrequest for review involves a rural 7.8 mile long pipeline system between the DCP Midstream\nGreeley and the Mewbourn Gas Plants located in Weld County, Colorado.\nAlthough § 190.9 was not adopted by the Public Utilities Commission, Pipeline Safety staff has\nreviewed the petition from DCP Midstream (attached) under the alternative PUC rule 4904,4\nCode of Colorado Regulations (CCR) 723-4 Rules Regulating Gas Utilities and Pipeline\nOperators.\nThis review does not address applicability of §40-1-1 03, C.R.S. or whether it is a Henshaw\npipeline, and pertains only to pipeline safety regulations found under 4 Code of Colorado\nRegulations (CCR) 723-4 Rules Regulating Gas Utilities and Pipeline Operators.\nThe endpoint of gathering, under § 192.8(a)(2) and API Recommended Practice (RP) 80, may\nnot extend beyond the first downstream natural gas processing plant, unless the operator can\ndemonstrate, using sound engineering principles, that gathering extends to a further downstream\nplant.\nThis system was reviewed using guidelines found in API RP 80, a field review, and as required\nunder § 192.8(a)(2) an analysis by the DCP Midstream engineering Department.\n1560 Broadway, Suite 250, Denver, Colorado 80202, 303-894-2000\nwww.dora.state.co.uslpuc Fax 303-894-2065\nTTY Users 711 (Relay Colorado) Transportation Fax 303-894-2071\nPermit and Insurance (Outside Denver) 1-800-888-0170 Consumer Affairs (Outside Denver) 1-800-456-0858\nConsumer Affairs 303-894-2070\n\n<<<PAGE 4>>>\n\nMr. Jeffrey D. Wiese\nPage 2\nDecember 9,2009\nUnder Rule 4904 the Chief of the PUC Gas Pipeline Safety section, has reviewed and agrees\nwith the following facts:\n• DCP Midstream is aware of PUC rule 4952(c) as it applies to the ANGI pipeline.\n• The ANGI pipeline is a 7.8 mile long rural (Class 1 as defined under § 192.5) gathering\nline connecting the Greeley and Mcwbourn Gas Plants.\n• The ANGI system's method of construction and materials used has been reviewed by the\nDCP Midstream Director of Asset Integrity and maximum allowable operating pressure\ndetermined in compliance with § 192.619.\n• The request is consistent with the \"gathering function\" as described in RP-80 2.4.2.\n• The dethanizer residue gas stream components from the Greeley Gas Plant to the\nMewboum Gas Plant is 98.68% ethane, propane, and carbon dioxide.\n• The gross dry heating value of the dethanizer residue gas stream from the Greeley Gas\nPlant at 14.65 psi a is 1764.3 BTU.\n• The Mewbourn Gas Plant is not a production treatment facility but is designed to treat,\ndehydrate, and process gas.\n• The Mewbourn Gas Plant is a defined and recognized gathering endpoint.\n• Raw, untreated gas from local producing natural gas wells flows directly into the ANGI\npipeline, commingled, and final treatment, dehydration, and processing take place at the\nMewbourn Plant. Final treated residue gas is sold to an intrastate and interstate pipeline.\n• Pipeline markers are located and maintained at each public road and railroad crossing in\ncompliance with § 192.707(d) and PUC Rule 4952(c).\nBased on these factors I recommend that the request to designate the 7.8 mile ANGI pipeline\nsystem as a gathering pipeline as it applies to § 192.8(a)(2) be approved.\n:Si;4Wtr\nStephan Port, PE\nChief, Gas Pipeline Safety\nCc: Mr. Chris Hoidal, Regional Director\nPHMSA Western Region\n\n<<<PAGE 5>>>\n\ndc::p\nMidstream\",\nOctober 22, 2008\nVIA CERTIFIED MAIL\nRETURN RECEIPT REQUESTED\nTracking Number 91 71082133393290942642\nSteve Pott, Chief\nColorado Public Utilities Commission\n1560 Broadway, Suite 250\nDenver, CO 80202\nZDLt) CC1 23 Hi 3: 21\nRe: Classifying Gathering Line under 192.8(a)(2)\nDCP Midstream\nWeld County Gathering System\nWeld County, Colorado\nDear Mr. Pott:\nDCP Midstream (DCP) is petitioning the Colorado Public Utilities Commission (PUC) for\na review for approval under § 190.9 for extending the endpoint of gathering beyond the\nfirst processing plant as defined under § 192.8(a)(2).\nThe following information has been attached to this letter in order to support this petition:\n1) Schematic illustrating 6\" line between Greeley Plant and Mewbourn Plant\n(Figure 1)\n2) Gas Analysis of the ethane stream (showing CO2)\n3) Analysis to identify regulated onshore gathering lines §192.8(b)(1) (DCP\nForm 45)\nDCP has evaluated this onshore gathering line using 49 CFR Part 192 and API RP 80 to\ndetermine if the specified line would qualify as an onshore gathering line in accordance\nwith 49 CFR 192.8(a)(2). The enclosed information supports DCP's request to classify\nthe 6-inch pipeline between the Greeley and Mewbourn plants as gathering.\nFigure 1 schematic describes the justification for two plants to complete the processing.\nDCP plans to take the ethane stream off of the Greeley plant process and transport the\ngas stream via the 6-inch pipeline to the inlet of the Mewbourn plant. This ethane\nstream will be commingled with the other gas gathered from the area and treated,\ndehydrated, and processed at the Mewbourn Plant as a combined stream. It is\nnecessary to recombine the ethane stream with the other unprocessed gas because the\nstream contains approximately 2.5 mole percent CO2. DCP believes this is adequate\nengineering justification to classify the 6-inch pipeline as gathering and move the\nendpoint of gathering to the Mewbourn Plant.\n\n<<<PAGE 6>>>\n\nOCP is documenting the line and its current regulatory status as follows and on the\nattached documentation (Form 45).\nThe usage of the line meets the criteria as defined in ~OT § 192.8 (a)(2):\nThe endpoint of gathering, under section 2.2(a)(1)(A) of API RP 80, may not extend\nbeyond the first downstream natural gas processing plant, unless the operator can\ndemonstrate, using sound engineering principles, that gathering extends to a further\ndownstream plant.\nThe line is a 6\" diameter steel pipeline, 0.188 w.t., grade X42 with a MAOP of 1,440 psi.\nThe pipeline operates between 60% SMYS and is Class 1.\nOCP respectfully requests that the PUC review this packet as cited in DOT §190.9(a) to\ndetermine if this meets \"sound engineering principles\" to justify the further downstream\nplant as the endpoint of gathering:\nIn circumstances where a rule contained in parts 192, 193 and 195 of this chapter\nauthorizes the Administrator to make a finding or approval, an operator may petition the\nAdministrator for such a finding or approval\nIn addition, the PUC rule §4904 provides for this same interpretation process under the\nstate rule.\n(a) An operator may request a regulatory interpretation of any of these rules by\nsubmitting a written request to the Chief The requestor shall include his or her return\naddress and the specific application and rule reference with the request.\nIf you have any questions regarding the regulatory justification for line, please do not\nhesitate to contact me at (303) 605-1979. Please direct your written response to\nOCP Midstream\nJeannette Jones\n370 1 ih Street, Suite 2500\nDenver, CO 80202\nSincerely,\n~~\nDirector - Asset Integrity\nOCP Midstream\nAttachments:\nOCP Midstream Onshore Gas Gathering Line Evaluation Forms\nSchematic of line (Figure 1)\nGas Analysis of Ethane Stream (Greeley Plant)\nCc: J. Kuchinski (OCP), T. Olin (OCP), C. Smith (DCP)\nPage 2of2\n\n<<<PAGE 7>>>\n\nDCP Form 45 c:lc::p Midstream.\nGas Pipeline Maximum Allowable Operating Pressure and % of SMYS Calculations\nRecord Retention: Completed MAOP Calculation Forms are kept all file with the asset/or the lif e of the pipelille and made available.\nupon request. for impecfiofl.\nCells requiring user entry; Used to automatically calculate MAOP - Blue\nCells with automatic calculations based on info provided - Yellow\n~~~----~~~~--~~~~--~~~----------------------------~-------------------.------,\nPODS Pipeline Segment Name ..;;;B;.;;I ______________________________ _\nPipeline System ANGI Weld County\n()perating Asset\nPODS Station Begin: ~~~~~~~~~~~~~\n40° 21' 49.10\" N\nEnd: 104°44'8.03\"W 40° 16'3.21\"N\nDate Constructed (nunldd/yyyy)\no\nr Gas Transmission Line (Complete Sections 3 and 5)\nr All transmission lines are regulated by DOT regardless of class location\nDesignated Start and End Points for regulated segments must be either latitude/longitude coordinates, or stationing addresses.\nRegulated Start Point: __ __ Regulated End Point:\nP' Onshore Gas Gathering (Complete Sections 3, 4, and 5)\nr Offshore Gas Gathering (Complete Sections 3 and 5)\nr Tl - M\nD = 61-6 (in.)\nt = 0.1 (in.)\nS = 42 000 (psi)\nP'Steel (Complete Section 3A)\nr Plastic (Complete Sections 3B)\nSection 3A: Calculations for Steel Pipelines:\nOutside Diameter of Pipe:\nNominal Wall Thickness of Pipe:\nSpecified Minimum Yield Strength (SMYS) for Steel:\nS = 24,000 Grade Unknown\nS = 30,000 Grade A\nS = 35,000 Grade B\nS = 42,000 Grade X42\nS = 46,000 Grade X46\nS = 52,000 Grade X52\nr Design Factor Override - check to override current class location and default to class 3 design factor\nDesign Factor Used for Steel based on Class Location: F = 0.72 I\nF = 0.72 for Class 1 Locations F '\" 0.50 for Class 3 Locations\nF '\" 0.60 for Class 2 Locations F '\" 0.40 for Class 4 Locations\nLongitudinal Joint Factor (Using § 192.113): E=\nE '\" 1.0 for Seamless, ERW, or DSA W\nE = 0.8 for other pipe manufactwing specification and pipe>4 inches\nE = 0.6 for furnace butt-weld\nE = 0.6 for other pipe manufactwing process and pipe 4 inches or less\nto I\nTemperature Derating Factor (Using § 192.115):\nT = 1.000 for 250 OF or less\nT = 0.967 for 300 OF\nT '\" 0.933 for 350 O F\nT =\nT = 0.900 for 400 O F\nT = 0.867 for 450 OF\nDCP Form 45 §192.603(b)\nPage 1 of 3\nRev 3 June 2007\n\n<<<PAGE 8>>>\n\n1,716.3 I(psig)\n2,018.181(psig)\n[ 2.22o.o l(psig)\nHTFIL--_I_ .lo--,I\nDCP Form 45 c:Jcp\nGas Pipeline Maximum Allowable Operating Pressure and % of SMYS Calculations\nMidstream_\nCompare 1 - 5 to define lowest MAOP:\n2 SI\nI.\nDesign MAOP =\nx F x E x T\nD\n2.\nTestMAOP =\nHydrates, prf}!!ure\nHTF\nHydrotest Pressure*\n.. Corrected test pressure at maximum elevation (lowest pressure) in test section.\nWhere HTF= hydrotest factor detcnnincd under § 192.619(a)(2)\n(Use §192.619(a)(2» summarized below for HTF:\nSegment Segment\nClass Installed before Installed after Converted under\nLocation (Nov 12, 1970) (Nov 12, 1970) §192.15\n1 1.10 1.10 1.25\n2 1.25 1.25 1.25\n3 1.40 1.50 1.50\n4 1.40 1.50 1.50\n3. Operating Limited MAOP = MAOP limited by pipeline / system, fitting, or equipment.\nItcm Flange Rating Pressure Rating I, .0 I (psig)\n4. MAOP of Pipeline = Lowest of 1,2, and 3: MAOP = 1,440.00 I (psig)\n5. lfno test records exist, use grandfathered MAOP (§ 192.619(a)(3» based on 5 year previous operating pressure:\nMonthlDayfYear: ________ Highest Operating Pressure: MAOP for Steel Pipeline based on lowest of 1 to 5:\n6. Pressure at 100% Hoop Stress:\n2 Sf\nP 1OO \". '\" -0 I (psig)\n:==1 , = 44=0=.0~1 (psig)\n2,383.7 I (psig)\nWhere: P J()()\"1n = Pressure that creates 1 00% hoop stress\nS = Tensile strength ofthe pipe\nD = Outside Diameter\nt = wall thickness\nMAOP x 100\n7. Hoop Stress as a Percentage of SMYS =\n~OO%\nBased on #7: P' MAOP produces a hoop stress >= 20% ofSMYS\nr MAOP produces a hoop stress <20%\n60.41 1% SMYS\nD =~ (in.)\nt = (in.)\nT = Degrees Fahrenheit\nSDR=\nS = (psi)\nr F = 0.25 for Wet Gas Service\nI I (psig)\nSection 38: Calculations for Plastic Pipelines:\nOutside Diameter of Pipe:\nNominal Wall Thickness of Pipe:\nSoil Temperature (for PE3408 pipe only, for all other pipe, eoter 100)\nStandard Dimension Ratio:\nLong Term Hydrostatic Strength:\nDesign Service Factor: 1. Design MAOP \"\"\nP' F = 0.32 for DIy Gas Service\n2 SI\n-----x F\n(D - t)\n2. Alternate method for determining design pressure using SDR of plastic pipe.\n'--\n__ .....,1 (psig)\nDesign MAOP = 2 S x F\n(SDR - 1)\nDCP Form 45 §192.603(b) Page 20f3 Rev 3 June 2007\n\n<<<PAGE 9>>>\n\nc:Jcp Midstream_\n'--\n__ -JI(psig)\n'--_-.;...-\\!(psig)\nI (psig)\n:======~I (psig)\nDCP Form 45\nGas Pipeline Maximum Allowable Operating Pressure and % of SMYS Calculations\n3. Hydra test pressure\nTestMAOP =\nHTF\nHydrotest Pressure'\"\n'\" Corrected test pressure at maximum elevation (lowest pressure) in test section.\nWhere HTF~ Hydrotest factor determined under §192.619(a)(2)(i)\n(Use § 192.619(a)(2)(i» HTF = 1.5 for all plastic pipelines regardless of class location.\n4. Operating Limited MAOP = MAOP limited by pipeline / system, fitting, or equipment.\nItem\nPressure Rating\n5. MAOP of Pipeline = Lowest of 1,2,3, and 4:\nMAOP \"\"\n6. lfno test records exist, use grandfathercd MAOP (§ 192.619(a)(3» based on highest operating pressure the 5 years\nprior to July, I 1970 for transmission pipelines or the 5 years prior March 15, 2006 for gathering pipelines.\nMonthlDaylY ear: Highest Operating Pressure: I (psig)\nMAOP for Plastic Pipeline based on lowest of I to 6: I (psig)\nr MAOP is >= 125 psig\nr MAOP is <125 psig\n[Sf. · 0 HR ·\nDetermine if Pipeline is Regulated Type A or Type B based on MAOP or Percent SMYS and class location\nDesignated Start and End Points for regulated segments must be either latitude/longitude coordinates, or stationing addresses.\nr N/A; Onshore vacuum line operating <0 psig; Exempt from DOT Part 192\nP\" N/A; Onshore gathering line in Class I location; not regulated\nr Regulated Type A steel & produces hoop stress >= 20% SMYS or Plastic & MAOP>'\" I 25 psig; Class 2,3, or 4\nRegulated Start Point: Regulated End Point:\nr Regulated Type B steel & produces hoop stress < 2oolo SMYS or Plastic & MAOP<125 psig; Area I (Class 3 or 4)\nRegulated Start Point: Regulated End Point:\nr Regulated Class 2 Type B steel & produces hoop stress < 2oolo SMYS or Plastic & MAOP<125 psig; Area 2\nr Area 2 (a) Method = 220 yd by I mile; II to 45 houses (Traditional Class 2 Calculation)\nr Area 2 (b) Method = ISO ft by I mile; II to 45 r Area 2 (c) Method = ISO ft by 1000 feet 5+ houses\nRegulated Start Point: Regulated End Point:\nr Not Regulated Class 2 Type B; Area 2 Method used; Insufficient house count\nr Area 2 Method = 150 ft by I mile; 10 or fewer houses r Area 2 Method 0: ISO ft by 1000 feet; <5 houses\n~~.'\" An\nDale:\nate.\nDCP Form 45 §192.603(b) Page 3 of 3 Rev 3 June 2007\n\n<<<PAGE 10>>>\n\n.-: \"\n~~: (: c ~ ;\nI' '-lLl'l ii \"\nFIGURE 1\nEXTEND GATHERING TO\nMEWBOURN GAS PLANT\nUNDER DOT 192.8 (a)(2)\n~\nI (GA THERING SYSTEM)\n1---\nDC? MIDSTREAM\nGREELEY GAS PLANT\nPROCESSING AND\nFRACTIONA TION\nN w.'\ns\n-\nI\nI\n\\ ~I--__ (_GA_T_H_ER_ING SYSTEM)\n-\n(GATHERING SYSTEM) / !\n_ I ''-----I..-t\n~I--L.....,.\n1\nDC? MIDSTREAM\nMEWBOURN GAS PLANT\nTREA TlNG D£HYDRA nON\nRESIDUE GAS .... .= ___ --f AND PROCESSING I---Ip~ NGL\nSCHEMATIC\nMEWBOURN GAS PLANT ADDITON\nWELD GATHERING SYSTEM\ndi:;p Midstream.\nWeld County\nCOLORADO\nDWG NO. \\data\\Drawlngs\\Standords\\J_Jones\\MewbournSchematic\n\n<<<PAGE 11>>>\n\n,\nNATURAL GAS ANALYSIS\nPROJECT NO. 200810091\nCOMPANY NA MF. : Dcr MIOSTREAM - LP\nACCOUNT NO.\nPRODUCER\nGREELEY PLANT\nLEASE NO.\nNAMEIl>ESCKIP : DETHANIZER OVERIIEAD\n'\"PlELDDATA'''\nSAMPl.ED BY\nD.S.\nSAM PLE PR ES\n278\nSAMPLE TEMP\n67\nCOMMENTS\nS POt'\nANALYS IS NO.: 01\nANALYSIS DATE; OCTonER IG. 20 0~\nSAMPLF DATE : OCTOBER 15.2008\nTO:\nCYLI NDER NO. 0 ·8\nCOMPONENTS\nAMfl lENT TEMP.:\nGRAVITY\nVAPOR PRES.\nGPM @\n14.65\nHELIUM\nHYDROGEN\nOXYGEN/ARGON\nNITROGEN\nCO2\nMETHANE\nETHANE\nPROPANE\nISOBUTANE\nN-BUTANE\nISOPF.NTANE\nN·PENTANE\nHeXANES+\nNORM\nMOLE%\n0.00\n0.00\n0.00\n0.01\n2.50\n1.31\n90.90\n5 28\n0.00\n0.00\n0.00\n0.00\n0.00\n100.00\n(;PM (a!\n14.13\n24. IKO\n1.4·17\n0.000\n0.000\n0.000\n0.000\n0.000\n24 .312\n1.455\n0.000\n0.000\n0.000\n0.000\n0000\nTOTAL\nI3TU@60DWF\nGROSS DRY REAL =\nGROSS WET REA L =\n25.627\n14.65\n25 .767\n14.73\nRELATIVE DENSITY (AIR- I @14('96PSIA60F) :\n1764.3\n17JJ.5\nI 'c)78 3\n1774.0\n1741. 1\nCOM PRESSIBILITY FACTOR\n0.991 4 5\nNOtE.- R/;.'FERENCE CPA 1161(ASTM DI 9<15). ]U5, a 117] CURRENr PUBLICi nONS\n\n<<<PAGE 12>>>","truncated":false,"body_characters":19117}