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§195.406 Maximum Operating Pressure, Guidance
|Enforcement Guidance||O&M Part 195|
|Section Title||Maximum Operating Pressure|
|ExistingCodeLanguage||(a) Except for surge pressures and other variations from normal operations, no operator may operate a pipeline at a pressure that exceeds any of the following:
(1) The internal design pressure of the pipe determined in accordance with §195.106. However, for steel pipe in pipelines being converted under §195.5, if one or more factors of the design formula (§195.106) are unknown, one of the following pressures is to be used as design pressure:
(i) Eighty percent of the first test pressure that produces yield under section N5.0 of Appendix N of ASME B31.8, reduced by the appropriate factors in §§195.106(a) and (e); or
(ii) If the pipe is 323.8 mm (12: in) or less outside diameter and is not tested to yield under this paragraph, 1379 kPa (200 psig).
(2) The design pressure of any other component of the pipeline.
(3) Eighty percent of the test pressure for any part of the pipeline which has been pressure tested under Subpart E of this part.
(4) Eighty percent of the factory test pressure or of the prototype test pressure for any individually installed component which is excepted from testing under §195.305.
(5) For pipelines under §§195.302(b)(1) and (b)(2)(i), that have not been pressure tested under Subpart E of this part, 80 percent of the test pressure or highest operating pressure to which the pipeline was subjected for 4 or more continuous hours that can be demonstrated by recording charts or logs made at the time the test or operations were conducted.
(b) No operator may permit the pressure in a pipeline during surges or other variations from normal operations to exceed 110 percent of the operating pressure limit established under paragraph (a) of this section. Each operator must provide adequate controls and protective equipment to control the pressure within this limit.
|Origin of Code||Original Code Document, 35 FR 17183, 11-07-70|
|Last Amendment||Amdt. 195-65, 63 FR 59475, 11-04-1998.|
|Interpretation: PI-91-008 Date: 03-25-1991The operator of a regulated pipeline may not own the device on a refiner’s grounds that is necessary to control pressure is responsible for compliance with Part 195 standards governing that device, because the operator is using or relying on the device to operate its pipeline according to §195.406(b).|
|Advisory Bulletin/Alert Notice Summaries||Advisory Bulletin ADB-11-01, Establishing Maximum Allowable Operating Pressure or Maximum Operating Pressure Using Record Evidence, and Integrity Management Risk Identification, Assessment, Prevention, and MitigationPHMSA is issuing an Advisory Bulletin to remind operators of gas and hazardous liquid pipeline facilities of their responsibilities, under Federal integrity management (IM) regulations, to perform detailed threat and risk analyses that integrate accurate data and information from their entire pipeline system, especially when calculating Maximum Allowable Operating Pressure (MAOP) or Maximum Operating Pressure (MOP), and to utilize these risk analyses in the identification of appropriate assessment methods, and preventive and mitigative measures.|
a. Kinder Morgan Energy Partners, LP [4-2006-5023] (Aug. 31, 2010): Inherent in the requirement imposed under 49 C.F.R. § 195.406(b)—i.e., to provide adequate controls and protective equipment to ensure that the pressure in a pipeline during surges or other variations from normal operations does not exceed 110 percent of the established maximum operating pressure—is an obligation on the part of the operator to use reasonable means to determine what controls and protective equipment are adequate for a particular pipeline system and to document the basis for that determination. CO/CP
b. Enterprise Products Operating, LLC [4-2007-5015] (Dec. 2, 2009): An operator must consider the potential for pressure surges in making a determination under 49 C.F.R. § 195.406(b) about the adequacy of the controls and protective equipment for a particular pipeline system. CO/CP
c. Dixie Pipeline Company [2-2004-5009] (Oct. 21, 2004): The pressure of a pipeline may not exceed the maximum operating pressure (MOP) as established under 49 C.F.R. § 195.406(a) during normal operations. The pressure of a pipeline may not exceed 110 percent of MOP during surges or other variations from normal operations under 49 C.F.R. § 195.406(b). CP
|Examples of aProbable Violation||
|Examples of Evidence||