Operations and Maintenance Guidance 49 CFR 192 …

1 Operations and Maintenance Guidance 49 cfr 192 (Subparts L & M) Introduction The materials contained in this document consist of Guidance , techniques, procedures and other information for internal use by the phmsa pipeline safety enforcement staff. This Guidance document describes the practices used by phmsa pipeline safety investigators and other enforcement personnel in undertaking their compliance, inspection, and enforcement activities and is intended to be used solely as a reference by phmsa personnel. This document is Government property and is to be used in conjunction with official duties. The Federal pipeline safety regulations (49 CFR Parts 190-199) discussed in this Guidance document contains legally binding requirements.

2 This document is not a regulation and creates no new legal obligations. In the event of a conflict between this document and any regulation, the document would not be controlling. The materials in this document are explanatory in nature and reflect phmsa s current application of the regulations in effect at the time of the issuance of the Guidance to the implementation scenarios presented in the materials. Alternative approaches are not precluded if they satisfy the requirements of the applicable regulation(s). Nothing in this Guidance document is intended to diminish or otherwise affect the authority of phmsa to carry out its statutory, regulatory or other official functions or to commit phmsa to taking any action that is subject to its discretion.

3 Nothing in this document is intended to and does not create any legal or equitable right or benefit, substantive or procedural, enforceable at law by any person or organization against phmsa , its personnel, State agencies or officers carrying out programs authorized under Federal law. Decisions about specific investigations and enforcement cases are made according to the specific facts and circumstances at hand. Investigations and compliance determinations often require careful legal and technical analysis of complicated issues. Although this Guidance document serves as a reference for the staff responsible for investigations and enforcement, no set of procedures or policies can replace the need for active and ongoing consultation with supervisors and colleagues in enforcement matters.

4 Comments and suggestions for future changes and additions to this Guidance document are invited and should be forwarded to your supervisor. The materials in this Guidance document may be modified or revoked without prior notice by phmsa management. _____ 2 THIS DOCUMENT IS FOR INTERNAL USE WITHIN phmsa ONLY Operations and Maintenance Guidance 49 cfr 192 (Subparts L & M) Table of Contents Keyword Index .. 4 Terms and Definitions .. 6 Procedural Manual General Provisions .. 35 (a) Procedural Manual General O&M Plan .. 37 (b) Procedural Manual For Operations , Maintenance , and Emergencies .. 39 (c) Procedural Manual - Abnormal Operations .. 43 (d) Procedural Manual Safety Related Condition Reports.

5 45 (e) Procedural Manual Surveillance, Emer. Response, & Accident Investigation .. 48 Change in Class Location: Required Study .. 49 Change in Class Location: Confirmation or Revision of MAOP .. 52 Underwater Inspection and Re-burial of Pipelines in Gulf of Mexico and its Inlets .. 58 Continuing Surveillance .. 62 Damage Prevention Program .. 66 Emergency Plans .. 70 Public Awareness .. 74 Investigation of Failures .. 80 Maximum Allowable Operating Pressure: Steel or Plastic Pipelines .. 82 Odorization of Gas .. 86 Tapping Pipelines Under Pressure .. 91 Purging of Pipelines .. 92 93 Transmission Lines: Patrolling .. 96 Transmission Lines: Leakage Surveys .. 99 3 THIS DOCUMENT IS FOR INTERNAL USE WITHIN phmsa ONLY Line Markers for Mains and Transmission Lines.

6 101 Transmission Lines: Record Keeping .. 106 Transmission Lines: General Requirements for Repair Procedures .. 107 Transmission Lines: Permanent Field Repair of Imperfections and Damages .. 109 Transmission Lines: Permanent Field Repair of Welds .. 111 Transmission Lines: Permanent Field Repair of Leaks .. 113 Transmission Lines: Testing of Repairs .. 115 Abandonment or Inactivation of Facilities .. 117 Compressor Stations: Inspection and Testing of Relief Devices .. 120 Compressor Stations: Gas Detection .. 124 Pressure Limiting and Regulating Stations: Inspection and Testing .. 126 Pressure Limiting and Regulating Stations: Capacity of Relief Valves .. 131 Valve Maintenance : Transmission Lines.

7 134 Vault Maintenance .. 136 Prevention of Accidental Ignition .. 137 4 THIS DOCUMENT IS FOR INTERNAL USE WITHIN phmsa ONLY Keyword Index Abandonment .. 4, 115, 116 Abnormal Operations .. 35, 36, 39, 42 Accident Investigation .. 39, 46, 93 Bottle .. 6, 8, 32, 37, 38 Class Location .. 17, 47, 48, 49, 50, 51, 52, 53, 54, 55, 60, 61, 81, 82, 84, 86, 94, 95, 96, 97, 99, 101, 102 Computerized records .. 33 Damage Prevention .. 67 Emergency Plan .. 35, 46, 70 Gas Detection .. 123 Grandfathered .. 47, 51, 81, 82 Gulf of Mexico .. 56, 57 Hoop Stress .. 19, 47, 51 Hot Tapping .. 15, 29, 89 Leak Survey .. 61, 97, 98 Line Markers .. 99 MAOP .. 19, 37, 47, 48, 49, 51, 54, 55, 81, 82, 83, 86, 105, 112, 119, 121, 124, 126, 128, 130, 131 Maps.

8 33, 37, 55, 70, 71, 96, 102 MOP .. 19 MP5 .. 47, 48, 49, 82, 83 National Response Center .. 56, 57, 58 NDT .. 4, 21, 61, 89, 107, 110, 111, 114 O&M Manual .. 36, 40, 42, 45, 46, 66, 96 Odorization .. 22, 61, 87 Over-pressure Protection .. 54, 119, 125, 126, 129, 130 Patrol .. 49, 61 Patrolling .. 93, 96, 104 Pipe .. 11, 12, 16, 21, 23, 26, 38, 83, 92, 95, 102 Pipeline Repair .. 105, 107, 109, 111 Pressure Gradient .. 48 Pressure Reduction .. 50, 61 5 THIS DOCUMENT IS FOR INTERNAL USE WITHIN phmsa ONLY Procedures .. 35, 36, 39, 40, 42, 45, 46, 133 Purging .. 25, 90 Safety-Related Condition .. 45 SCADA .. 7, 9, 29, 70, 83 SMYS .. 20, 28, 29, 47, 50, 51, 54, 105, 106, 107, 108, 109, 111, 119, 124, 126 Surveillance.

9 46 Valves .. 19, 35 Welding .. 26, 31, 107, 109 Enforcement Manual: Code Compliance Guidelines: Gas 07-18-2005 Page: 6 Term Definition THIS DOCUMENT IS FOR INTERNAL USE WITHIN phmsa ONLY Abandoned Pipeline A pipeline that has been physically separated from its source of gas or hazardous liquid and is no longer maintained under regulation 49 CFR Parts 192 or 195, as applicable. Abandoned pipelines are usually purged of the gas or liquid and refilled with nitrogen, water, or a non-flammable slurry mixture. In 49 CFR Part 192 Abandoned means permanently removed from service. Active Corrosion Active corrosion describes an ongoing electro-chemical process whereby microscopic metal particles are removed from ferrous-based materials.

10 Corrosion can occur in moist atmospheric conditions but is more prevalent in subterranean environments. Active corrosion within the pipeline industry is a serious threat to pressure containing structures that, unless controlled, could result in a condition that is detrimental to public safety. Actual wall thickness The measured wall thickness of pipe from its inner surface to its outer surface. This measured dimension must be within tolerances stated in the manufacturer s specification. Actual wall thickness of installed pipe can be determined by using an ultra-sonic thickness gauge (UT gauge). Actuator A component designed to provide the mechanical energy to physically move a connected device. In the oil and gas industry, actuators are used extensively to move valves to their open and closed positions.