B L A N K 
i

Guide for 

Gas Transmission 

and 

Distribution Piping 

Systems 

2009 Edition 

January 2009 

Author: 

Gas Piping Technology Committee (GPTC) Z380 

Accredited by ANSI 

Secretariat: 

American Gas Association 

Approved by 

American National Standards Institute (ANSI) 

March 25, 2009 

ANSI/GPTC Z380.1-2009 

Catalog Number: Z380109 
GPTC GUIDE FOR GAS TRANSMISSION AND 

DISTRIBUTION PIPING SYSTEMS: 2009 Edition 

ii

PLEASE NOTE 

Addenda to this Guide will also be issued periodically to enable users to keep the Guide up-to-date 

by replacing the pages that have been revised with the new pages. It is advisable, however, that 

pages which have been revised be retained so that the chronological development of the Federal 

Regulations and the Guide is maintained. 

CAUTION 

As part of document purchase, GPTC (using AGA as Secretariat) will try to keep purchasers 

informed on the current Federal Regulations as released by the Department of Transportation (DOT). 

This is done by periodically issuing addenda to update both the Federal Regulations and the guide 

material. It is the responsibility of the purchaser to obtain a copy of any addenda. Addenda are 

posted on the Committee’s webpage at www.aga.org/gptc. The GPTC assumes no responsibility in 

the event the purchaser does not obtain addenda. The purchaser is reminded that the changes to 

the Regulations can be timely noted on the Federal Register's web site. 

No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, 

without the prior written permission of the American Gas Association. 

Participation by state and federal agency representative(s) or person(s) affiliated with industry is not to be 

interpreted as government or industry endorsement of the guide material in this Guide. 

Conversions of figures to electronic format courtesy of ViaData Incorporated. 

Copyright 2009 

THE AMERICAN GAS ASSOCIATION 

400 N. Capitol St., NW 

Washington, DC 20001 

All Rights Reserved 

Printed in U.S.A.
i

Guide for 

Gas Transmission 

and 

Distribution Piping 

Systems 

2009 Edition 

Addendum 1, May 2009 

an American National Standard 

Author: 

Gas Piping Technology Committee (GPTC) Z380 

Accredited by ANSI 

Secretariat: 

American Gas Association 

Approved by 

American National Standards Institute (ANSI) 

October 9, 2009 

ANSI/GPTC Z380.1-2009, Addendum No.1-2009 

Catalog Number: Z38010901 
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

ii

PLEASE NOTE

Addenda to this Guide will also be issued periodically to enable users to keep the Guide up-to-date 

by replacing the pages that have been revised with the new pages. It is advisable, however, that 

pages which have been revised be retained so that the chronological development of the Federal 

Regulations and the Guide is maintained.

CAUTION

As part of document purchase, GPTC (using AGA as Secretariat) will try to keep purchasers informed 

on the current Federal Regulations as released by the Department of Transportation (DOT). This is 

done by periodically issuing addenda to update both the Federal Regulations and the guide material. 

It is the responsibility of the purchaser to obtain a copy of any addenda. Addenda are posted on the 

Committee’s webpage at www.aga.org/gptc. The GPTC assumes no responsibility in the event the 

purchaser does not obtain addenda. The purchaser is reminded that the changes to the Regulations 

can be timely noted on the Federal Register's web site.

No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, 

without the prior written permission of the American Gas Association.

Participation by state and federal agency representative(s) or person(s) affiliated with industry is not to be 

interpreted as government or industry endorsement of the guide material in this Guide.

Conversions of figures to electronic format courtesy of ViaData Incorporated.

Copyright 2009

THE AMERICAN GAS ASSOCIATION

400 N. Capitol St., NW

Washington, DC 20001

All Rights Reserved

Printed in U.S.A.
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

iii

CONTENTS

Page

PREFACE......................................................................................................................................... xiii

HISTORY .......................................................................................................................................... xiii

FOREWORD....................................................................................................................................xiv

LETTER TO GAS PIPING TECHNOLOGY COMMITTEE FROM 

THE U.S. DEPARTMENT OF TRANSPORTATION ....................................................xv

AMERICAN GAS ASSOCIATION (AGA) NOTICE AND DISCLAIMER....................xvi

EDITORIAL CONVENTIONS OF THE GUIDE.................................................................. xvii

EDITORIAL NOTES FOR THE HISTORICAL RECONSTRUCTION OF 

PARTS 191 AND 192...................................................................................................................xix

HISTORICAL RECONSTRUCTION OF PART 191..........................................................xix

HISTORICAL RECORD OF AMENDMENTS TO PART 191 ........................................xxi

HISTORICAL RECONSTRUCTION OF PART 192.........................................................xxv

HISTORICAL RECORD OF AMENDMENTS TO PART 192 .....................................xxxv

GAS PIPING TECHNOLOGY COMMITTEE MEMBERSHIP LIST............................. lvii

PART 191 -- ANNUAL REPORTS, INCIDENT REPORTS, AND SAFETY-RELATED

CONDITION REPORTS........................................................................................................... 1 

 191.1 Scope........................................................................................................................... 1 

191.3 Definitions .................................................................................................................... 2 

191.5 Telephonic notice of certain incidents ......................................................................... 3 

191.7 Addressee for written reports ...................................................................................... 4 

191.9 Distribution system: Incident report ............................................................................. 5 

191.11 Distribution system: Annual report............................................................................... 5 

191.13 Distribution systems reporting transmission pipelines; transmission or gathering 

 systems reporting distribution pipelines ............................................................. 6 

191.15 Transmission and gathering systems: Incident report ................................................ 6 

191.17 Transmission and gathering systems: Annual report.................................................. 7 

191.19 Report forms ................................................................................................................ 7 

191.21 OMB control number assigned to information collection ............................................ 7 

191.23 Reporting safety-related conditions............................................................................. 8 

191.25 Filing safety-related condition reports.......................................................................... 9 

191.27 Filing offshore pipeline condition reports................................................................... 10
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

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PART 192 -- MINIMUM FEDERAL SAFETY STANDARDS.......................................... 13 

SUBPART A -- GENERAL .................................................................................................................. 13 

192.1 What is the scope of this part?.................................................................................. 13 

192.3 Definitions .................................................................................................................. 15

192.5 Class locations........................................................................................................... 23 

192.7 What documents are incorporated by reference partly or wholly

 in this part? ....................................................................................................... 24 

192.8 How are onshore gathering lines and regulated onshore gathering

 lines determined? ............................................................................................. 29 

192.9 What requirements apply to gathering lines?............................................................ 31

192.10 Outer continental shelf pipelines........................................................................... 32

192.11 Petroleum gas systems ............................................................................................. 33

192.12 (Removed) ................................................................................................................. 35

192.13 What general requirements apply to pipelines regulated under this part? ............... 36

192.14 Conversion to service subject to this part.................................................................. 37

192.15 Rules of regulatory construction................................................................................ 38

192.16 Customer notification................................................................................................. 38

192.17 (Removed) ................................................................................................................. 39

SUBPART B -- MATERIALS............................................................................................................... 41

192.51 Scope......................................................................................................................... 41

192.53 General ...................................................................................................................... 41

 192.55 Steel pipe ................................................................................................................... 42

192.57 (Removed and reserved)........................................................................................... 43

192.59 Plastic pipe................................................................................................................. 43

192.61 (Removed and reserved)........................................................................................... 44

192.63 Marking of materials .................................................................................................. 44

192.65 Transportation of pipe................................................................................................ 45

SUBPART C -- PIPE DESIGN............................................................................................................. 47

192.101 Scope......................................................................................................................... 47

192.103 General ...................................................................................................................... 47

192.105 Design formula for steel pipe..................................................................................... 48

192.107 Yield strength (S) for steel pipe ................................................................................. 49

192.109 Nominal wall thickness (t) for steel pipe.................................................................... 50

192.111 Design factor (F) for steel pipe .................................................................................. 50

192.112 Additional design requirements for steel pipe using alternative maximum

 allowable operating pressure ........................................................................... 52

192.113 Longitudinal joint factor (E) for steel pipe.................................................................. 57

192.115 Temperature derating factor (T) for steel pipe .......................................................... 58

 192.117 (Removed and reserved)........................................................................................... 58

 192.119 (Removed and reserved)........................................................................................... 58

 192.121 Design of plastic pipe................................................................................................. 58

192.123 Design limitations for plastic pipe .............................................................................. 62

192.125 Design of copper pipe................................................................................................ 65

SUBPART D -- DESIGN OF PIPELINE COMPONENTS .................................................................. 67

192.141 Scope......................................................................................................................... 67

192.143 General requirements................................................................................................ 67

192.144 Qualifying metallic components................................................................................. 68

192.145 Valves......................................................................................................................... 69

192.147 Flanges and flange accessories................................................................................ 70
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

v

192.149 Standard fittings ......................................................................................................... 74

192.150 Passage of internal inspection devices ..................................................................... 74

192.151 Tapping ...................................................................................................................... 75

192.153 Components fabricated by welding ........................................................................... 77

192.155 Welded branch connections...................................................................................... 77

192.157 Extruded outlets ......................................................................................................... 81

192.159 Flexibility..................................................................................................................... 82

192.161 Supports and anchors................................................................................................ 85

192.163 Compressor stations: Design and construction ........................................................ 86

192.165 Compressor stations: Liquid removal........................................................................ 88

192.167 Compressor stations: Emergency shutdown ............................................................ 88

192.169 Compressor stations: Pressure limiting devices ....................................................... 89

192.171 Compressor stations: Additional safety equipment................................................... 90

192.173 Compressor stations: Ventilation............................................................................... 91

192.175 Pipe-type and bottle-type holders .............................................................................. 92

192.177 Additional provisions for bottle-type holders.............................................................. 93

192.179 Transmission line valves ........................................................................................... 94

192.181 Distribution line valves ............................................................................................... 95

192.183 Vaults: Structural design requirements ..................................................................... 96

192.185 Vaults: Accessibility.................................................................................................... 97

192.187 Vaults: Sealing, venting, and ventilation.................................................................... 98

192.189 Vaults: Drainage and waterproofing.......................................................................... 99

192.191 Design pressure of plastic fittings.............................................................................. 99

192.193 Valve installation in plastic pipe ................................................................................. 99

192.195 Protection against accidental overpressuring ......................................................... 100

192.197 Control of the pressure of gas delivered from high-pressure 

 distribution systems ........................................................................................ 102

192.199 Requirements for design of pressure relief and limiting devices ............................ 103

192.201 Required capacity of pressure relieving and limiting stations ................................. 105

192.203 Instrument, control, and sampling pipe and components....................................... 107

SUBPART E -- WELDING OF STEEL IN PIPELINES..................................................................... 109

192.221 Scope....................................................................................................................... 109

192.223 (Removed) ............................................................................................................... 109

192.225 Welding procedures................................................................................................. 109

192.227 Qualification of welders............................................................................................ 110

 192.229 Limitations on welders ............................................................................................. 110

192.231 Protection from weather .......................................................................................... 111

192.233 Miter joints................................................................................................................ 112

192.235 Preparation for welding............................................................................................ 112

192.237 (Removed) ............................................................................................................... 113

192.239 (Removed) ............................................................................................................... 113

192.241 Inspection and test of welds .................................................................................... 113

 192.243 Nondestructive testing ............................................................................................. 114

192.245 Repair or removal of defects ................................................................................... 115

SUBPART F -- JOINING OF MATERIALS OTHER THAN BY WELDING..................................... 117

192.271 Scope....................................................................................................................... 117

192.273 General .................................................................................................................... 117

192.275 Cast iron pipe........................................................................................................... 119

192.277 Ductile iron pipe ....................................................................................................... 119

192.279 Copper pipe.............................................................................................................. 119

192.281 Plastic pipe............................................................................................................... 120
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

vi

192.283 Plastic pipe: Qualifying joining procedures.............................................................. 124

192.285 Plastic pipe: Qualifying persons to make joints....................................................... 127

192.287 Plastic pipe: Inspection of joints ............................................................................. 128

SUBPART G -- GENERAL CONSTRUCTION REQUIREMENTS FOR TRANSMISSION

LINES AND MAINS ................................................................................................................... 129

192.301 Scope....................................................................................................................... 129

192.303 Compliance with specifications or standards .......................................................... 129

192.305 Inspection: General.................................................................................................. 129

192.307 Inspection of materials ............................................................................................ 130

192.309 Repair of steel pipe.................................................................................................. 130 

192.311 Repair of plastic pipe ............................................................................................... 132

192.313 Bends and elbows.................................................................................................... 133

192.315 Wrinkle bends in steel pipe...................................................................................... 134

192.317 Protection from hazards .......................................................................................... 134

192.319 Installation of pipe in a ditch..................................................................................... 136

192.321 Installation of plastic pipe......................................................................................... 138

192.323 Casing...................................................................................................................... 143

 192.325 Underground clearance........................................................................................... 144

192.327 Cover........................................................................................................................ 145

192.328 Additional construction requirements for steel pipe using alternative

 maximum allowable operating pressure ........................................................ 146

SUBPART H -- CUSTOMER METERS, SERVICE REGULATORS, AND SERVICE LINES ........ 149

192.351 Scope....................................................................................................................... 149

192.353 Customer meters and regulators: Location............................................................. 149

192.355 Customer meters and regulators: Protection from damage ................................... 151

192.357 Customer meters and regulators: Installation ......................................................... 153

192.359 Customer meter installations: Operating pressure ................................................. 154

192.361 Service lines: Installation ......................................................................................... 155

192.363 Service lines: Valve requirements ........................................................................... 158

192.365 Service lines: Location of valves ............................................................................. 159

192.367 Service lines: General requirements for connections to main piping ..................... 159

192.369 Service lines: Connections to cast iron or ductile iron mains.................................. 161

192.371 Service lines: Steel .................................................................................................. 161

192.373 Service lines: Cast iron and ductile iron .................................................................. 161

192.375 Service lines: Plastic ................................................................................................ 162

192.377 Service lines: Copper .............................................................................................. 162

192.379 New service lines not in use .................................................................................... 163

192.381 Service lines: Excess flow valve performance standards....................................... 163

192.383 Excess flow valve customer notification.................................................................. 166

SUBPART I -- REQUIREMENTS FOR CORROSION CONTROL.................................................. 169

192.451 Scope....................................................................................................................... 169

192.452 How does this subpart apply to converted pipelines and regulated

 onshore gathering lines? ................................................................................ 169

192.453 General .................................................................................................................... 170

192.455 External corrosion control: Buried or submerged pipelines 

 installed after July 31, 1971............................................................................ 170

192.457 External corrosion control: Buried or submerged pipelines

 installed before August 1, 1971...................................................................... 172
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

vii

192.459 External corrosion control: Examination of buried pipeline when exposed ............ 173

192.461 External corrosion control: Protective coating......................................................... 174

192.463 External corrosion control: Cathodic protection ...................................................... 175

192.465 External corrosion control: Monitoring..................................................................... 176

192.467 External corrosion control: Electrical isolation......................................................... 181

192.469 External corrosion control: Test stations ................................................................. 184

192.471 External corrosion control: Test leads..................................................................... 184

192.473 External corrosion control: Interference currents.................................................... 185

192.475 Internal corrosion control: General .......................................................................... 186

192.476 Internal corrosion control: Design and construction of transmission line ............... 189

192.477 Internal corrosion control: Monitoring ...................................................................... 190

192.479 Atmospheric corrosion control: General.................................................................. 191

192.481 Atmospheric corrosion control: Monitoring.............................................................. 192

192.483 Remedial measures: General.................................................................................. 193

192.485 Remedial measures: Transmission lines ................................................................ 193

192.487 Remedial measures: Distribution lines other than cast iron or

 ductile iron lines .............................................................................................. 195

192.489 Remedial measures: Cast iron and ductile iron pipelines....................................... 196

192.490 Direct assessment ................................................................................................... 197

192.491 Corrosion control records ........................................................................................ 197

SUBPART J -- TEST REQUIREMENTS .......................................................................................... 199

192.501 Scope....................................................................................................................... 199

192.503 General requirements.............................................................................................. 199

192.505 Strength test requirements for steel pipeline to operate at a

 hoop stress of 30 percent or more of SMYS ................................................. 200

192.507 Test requirements for pipelines to operate at a hoop stress less than

 30 percent of SMYS and at or above 100 p.s.i. (689 kPa) gage................... 203

192.509 Test requirements for pipelines to operate below 100 p.s.i. (689 kPa) gage......... 203

192.511 Test requirements for service lines ......................................................................... 204

192.513 Test requirements for plastic pipelines.................................................................... 204

192.515 Environmental protection and safety requirements................................................. 205

192.517 Records.................................................................................................................... 208

SUBPART K -- UPRATING .............................................................................................................. 209

192.551 Scope....................................................................................................................... 209

192.553 General requirements.............................................................................................. 209

192.555 Uprating to a pressure that will produce a hoop stress of

 30 percent or more of SMYS in steel pipelines.............................................. 211

192.557 Uprating: Steel pipelines to a pressure that will produce a hoop stress less

 than 30 percent of SMYS: plastic, cast iron, and ductile iron pipelines......... 213

SUBPART L -- OPERATIONS .......................................................................................................... 217

192.601 Scope....................................................................................................................... 217

192.603 General provisions................................................................................................... 217

192.605 Procedural manual for operations, maintenance, and emergencies...................... 218

192.607 (Removed and reserved)......................................................................................... 226

192.609 Change in class location: Required study ............................................................... 226

192.611 Change in class location: Confirmation or revision of 

 maximum allowable operating pressure ........................................................ 226
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

Addendum 1, May 2009 viii

192.612 Underwater inspection and re-burial of pipelines in the Gulf of Mexico

 and its inlets.................................................................................................... 228

192.613 Continuing surveillance........................................................................................229(a)

192.614 Damage prevention program................................................................................... 231

192.615 Emergency plans ..................................................................................................... 237

192.616 Public awareness..................................................................................................... 247

192.617 Investigation of failures ............................................................................................ 250

192.619 Maximum allowable operating pressure: Steel or plastic pipelines ........................ 252

 192.620 Alternative maximum allowable operating pressure for certain steel pipelines...... 254

192.621 Maximum allowable operating pressure: High-pressure 

 distribution systems ........................................................................................ 262

192.623 Maximum and minimum allowable operating pressure: Low-pressure

 distribution systems ........................................................................................ 263

192.625 Odorization of gas.................................................................................................... 263

192.627 Tapping pipelines under pressure........................................................................... 266

192.629 Purging of pipelines ................................................................................................. 268

SUBPART M -- MAINTENANCE....................................................................................................... 269

192.701 Scope....................................................................................................................... 269

192.703 General .................................................................................................................... 269

192.705 Transmission lines: Patrolling.................................................................................. 273

192.706 Transmission lines: Leakage surveys ..................................................................... 274

192.707 Line markers for mains and transmission lines....................................................... 275

192.709 Transmission lines: Record keeping ....................................................................... 276

192.711 Transmission lines: General requirements for repair procedures .......................... 276

192.713 Transmission lines: Permanent field repair of imperfections and damages .......... 277

192.715 Transmission lines: Permanent field repair of welds .............................................. 279

192.717 Transmission lines: Permanent field repair of leaks ............................................... 280

192.719 Transmission lines: Testing of repairs..................................................................... 280

192.721 Distribution systems: Patrolling................................................................................ 281

192.723 Distribution systems: Leakage surveys .................................................................. 282

192.725 Test requirements for reinstating service lines ....................................................... 284

192.727 Abandonment or deactivation of facilities................................................................ 284

192.729 (Removed) ............................................................................................................... 288

192.731 Compressor stations: Inspection and testing of relief devices................................ 288

192.733 (Removed) ............................................................................................................... 288

192.735 Compressor stations: Storage of combustible materials ........................................ 288

192.736 Compressor stations: Gas detection....................................................................... 289

192.737 (Removed) ............................................................................................................... 289

192.739 Pressure limiting and regulating stations: Inspection and testing ........................... 289

192.741 Pressure limiting and regulating stations: Telemetering or recording gauges ....... 292

192.743 Pressure limiting and regulating stations: Capacity of relief devices...................... 294

192.745 Valve maintenance: Transmission lines.................................................................. 295

192.747 Valve maintenance: Distribution systems ............................................................... 296

192.749 Vault maintenance................................................................................................... 297

192.751 Prevention of accidental ignition.............................................................................. 299

192.753 Caulked bell and spigot joints.................................................................................. 302

192.755 Protecting cast-iron pipelines................................................................................... 303

192.761 (Removed) ............................................................................................................... 303
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

ix

SUBPART N -- QUALIFICATION OF PIPELINE PERSONNEL ..................................................... 305

192.801 Scope....................................................................................................................... 305

192.803 Definitions ................................................................................................................ 306

192.805 Qualification program............................................................................................... 309

192.807 Recordkeeping......................................................................................................... 315

192.809 General .................................................................................................................... 316

SUBPART O – GAS TRANSMISSION PIPELINE INTEGRITY MANAGEMENT........................... 319

192.901 What do the regulations in this subpart cover?....................................................... 319

192.903 What definitions apply to this subpart?.................................................................... 320

192.905 How does an operator identify a high consequence area?..................................... 323

192.907 What must an operator do to implement this subpart?........................................... 329

192.909 How can an operator change its integrity management program?......................... 331

192.911 What are the elements of an integrity management program?.............................. 332

192.913 When may an operator deviate its program from certain requirements

 of this subpart? ............................................................................................... 335

192.915 What knowledge and training must personnel have to carry out an

 integrity management program?.................................................................... 336

192.917 How does an operator identify potential threats to pipeline integrity

 and use the threat identification in its integrity program? .............................. 338

192.919 What must be in the baseline assessment plan? ................................................... 339

192.921 How is the baseline assessment to be conducted?................................................ 344

192.923 How is direct assessment used and for what threats? ........................................... 345

192.925 What are the requirements for using External Corrosion Direct

 Assessment (ECDA)? .................................................................................... 346

192.927 What are the requirements for using Internal Corrosion Direct

 Assessment (ICDA)?...................................................................................... 353

192.929 What are the requirements for using Direct Assessment for Stress

 Corrosion Cracking (SCCDA)? ...................................................................... 355

192.931 How may Confirmatory Direct Assessment (CDA) be used?................................. 356

192.933 What actions must an operator take to address integrity issues?.......................... 357

192.935 What additional preventive and mitigative measures must an

 operator take?................................................................................................. 358

192.937 What is a continual process of evaluation and assessment to 

 maintain a pipeline’s integrity? ....................................................................... 364

192.939 What are the required reassessment intervals? ..................................................... 366

192.941 What is a low stress reassessment?....................................................................... 370

192.943 When can an operator deviate from these reassessment intervals?..................... 372

192.945 What methods must an operator use to measure program

 effectiveness?................................................................................................. 374

192.947 What records must an operator keep? ................................................................... 375

192.949 How does an operator notify PHMSA? .................................................................... 377

192.951 Where does an operator file a report? .................................................................... 378

SUBPART P – GAS DISTRIBUTION PIPELINE INTEGRITY MANAGEMENT (IM) ..................... 379

APPENDICES TO PART 192

Appendix A (Removed and reserved)................................................................................... 381

Appendix B Qualification of Pipe ........................................................................................... 383

Appendix C Qualification of Welders for Low Stress Level Pipe .......................................... 387

Appendix D Criteria for Cathodic Protection and Determination of Measurements ............. 391

Appendix E Guidance on Determining High Consequence Areas and on

 Carrying out Requirements in the Integrity Management Rule.................... 393
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

Addendum 1, May 2009 x

GUIDE MATERIAL APPENDICES

Guide Material Appendix G-191-1 Telephonic notice worksheet ...................................... 401

Guide Material Appendix G-191-2 Distribution system incident report.............................. 403

Guide Material Appendix G-191-3 Distribution system annual report ............................... 405

Guide Material Appendix G-191-4 Transmission and gathering systems

 incident report..................................................... 407

Guide Material Appendix G-191-5 Transmission and gathering systems

 annual report ...................................................... 409

Guide Material Appendix G-191-6 Determination of reporting requirements

 for safety-related conditions .............................. 411

Guide Material Appendix G-191-7 Safety-related condition report to United States

 Department of Transportation............................ 413

Guide Material Appendix G-192-1 Summary of references and related sources ............. 415

Guide Material Appendix G-192-1A Editions of material specifications, codes and 

 standards previously incorporated by reference

 in the Regulations........................................................ 439

Guide Material Appendix G-192-2 Specified minimum yield strengths ............................. 443

Guide Material Appendix G-192-3 Flexibility factor k and stress 

 intensification factor i ......................................... 447

Guide Material Appendix G-192-4 Rules for reinforcement of welded branch 

 connections ........................................................ 451

Guide Material Appendix G-192-5 Pipe end preparation................................................... 461

Guide Material Appendix G-192-6 Substructure damage prevention guidelines for

 directional drilling and other trenchless

 technologies ....................................................... 467

Guide Material Appendix G-192-7 Large-scale distribution outage response and 

 recovery.............................................................. 469

Guide Material Appendix G-192-8 Distribution Integrity Management Program

 (DIMP) ................................................................ 473

Guide Material Appendix G-192-9 Test conditions for pipelines other 

 than service lines ............................................... 501

Guide Material Appendix G-192-10 Test conditions for service lines.................................. 503

Guide Material Appendix G-192-11 Gas leakage control guidelines 

 for natural gas systems ...................................... 505

Guide Material Appendix G-192-11A Gas leakage control guidelines

 for petroleum gas systems................................. 527

Guide Material Appendix G-192-12 Planned shutdown....................................................... 547

Guide Material Appendix G-192-13 Considerations to minimize damage by outside 

 forces.................................................................. 551

Guide Material Appendix G-192-14 [Reserved] ................................................................... 555

Guide Material Appendix G-192-15 Design of uncased pipeline crossings of 

 highways and railroads....................................... 557

Guide Material Appendix G-192-15A Horizontal directional drilling (HDD)

 for steel pipelines................................................ 561

Guide Material Appendix G-192-15B Horizontal directional drilling (HDD) 

 for plastic pipe ................................................564(a)

Guide Material Appendix G-192-16 Substructure damage prevention guidelines .............. 565

 Guide Material Appendix G-192-17 Explicit requirements for reports, inspections, 

 tests, written procedures, records

 and similar actions............................................. 569

Guide Material Appendix G-192-18 Cast iron pipe .............................................................. 575
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

Addendum 1, May 2009 xi

Guide Material Appendix G-192-19 Memorandum of understanding between the 

 Department of Transportation and the

 Department of the Interior regarding

 outer continental shelf pipelines ...................... 579

Guide Material Appendix G-192-20 Fusion equipment maintenance/repair inspection

 form..................................................................... 583

Guide Material Appendix G-192-21 [Reserved] ................................................................... 585

Guide Material Appendix G-192-M SI (metric) units ........................................................... 587

INDEX............................................................................................................................................... 591
GPTC GUIDE FOR GAS TRANSMISSION AND

DISTRIBUTION PIPING SYSTEMS: 2009 Edition

xii

Reserved