1、Recommended Practice for Construction Parallel to Existing Underground Transmission PipelinesAPI RECOMMENDED PRACTICE 1172 FIRST EDITION, APRIL 2014Special NotesAPI publications necessarily address problems of a general nature. With respect to particular circumstances, local, state, and federal laws
2、 and regulations should be reviewed.Neither API nor any of APIs employees, subcontractors, consultants, committees, or other assignees make any warranty or representation, either express or implied, with respect to the accuracy, completeness, or usefulness of the information contained herein, or ass
3、ume any liability or responsibility for any use, or the results of such use, of any information or process disclosed in this publication. Neither API nor any of APIs employees, subcontractors, consultants, or other assignees represent that use of this publication would not infringe upon privately ow
4、ned rights.API publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with this publication and hereby
5、 expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any authorities having jurisdiction with which this publication may conflict.API publications are published to facilitate the broad availability of proven, sound engineering and ope
6、rating practices. These publications are not intended to obviate the need for applying sound engineering judgment regarding when and where these publications should be utilized. The formulation and publication of API publications is not intended in any way to inhibit anyone from using any other prac
7、tices.Any manufacturer marking equipment or materials in conformance with the marking requirements of an API standard is solely responsible for complying with all the applicable requirements of that standard. API does not represent, warrant, or guarantee that such products do in fact conform to the
8、applicable API standard.Users of this Recommended Practice should not rely exclusively on the information contained in this document. Sound business, scientific, engineering, and safety judgment should be used in employing the information contained herein. All rights reserved. No part of this work m
9、ay be reproduced, translated, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher. Contact the Publisher, API Publishing Services, 1220 L Street, NW, Washington, DC 20005.Copyrig
10、ht 2014 American Petroleum InstituteForewordNothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publi
11、cation be construed as insuring anyone against liability for infringement of letters patent.Shall: As used in a standard, “shall” denotes a minimum requirement in order to conform to the specification.Should: As used in a standard, “should” denotes a recommendation or that which is advised but not r
12、equired in order to conform to the specification. This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an API standard. Questions concerning the interpretation of the content of this p
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15、from the API Standards Department, telephone (202) 682-8000. A catalog of API publications and materials is published annually by API, 1220 L Street, NW, Washington, DC 20005.Suggested revisions are invited and should be submitted to the Standards Department, API, 1220 L Street, NW, Washington, DC 2
16、0005, standardsapi.org.iiiContentsPage1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Normative References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Terms, Definitions, Acronyms, and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.1 Terms and Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2 Acronyms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Parallel Construction Excavation Damage Prevention Guidelines . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Preliminary Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Final Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Preconstruction Activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 Construction Activities . . . . . . . . . .
21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128.1 Construction in All Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128.2 Construction in the E
22、ncroachment Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128.3 Construction in the Active Excavation Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148.4 Construction in the Excava
23、tion Tolerance Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 Post-construction Activities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Annex A (informative) Planni
24、ng and Design Review Meeting(s) Agenda . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Annex B (informative) Post-construction Review and Lessons Learned Meeting Agenda . . . . . . . . . . . . . . . . 19Figures1 Proposed Facility and Associated Survey Corridor . . . . . . . . . . . .
25、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Proposed Facility Along with Associated Survey Corridor and Due Diligence Corridor . . . . . . . . . . . . . . 73 A Preexisting Pipeline Affected by the Proposed Facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26、 . . . . . . . . 94 An Access Road in the Vicinity of the Existing and Proposed Pipeline. . . . . . . . . . . . . . . . . . . . . . . . . . . 105 Edge of Construction Activities for the Proposed Pipeline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Encroachment Areas
27、 of the Existing Pipeline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 Active Excavation Area and the Excavation Tolerance Zones of an Existing Pipeline. . . . . . . . . . . . . . . 15vviIntroductionTransmission pipelines 1move large amounts of
28、liquids (petroleum, petroleum products, anhydrous ammonia, or carbon dioxide) and natural gas from producing and/or refining locations to local “outlets,” such as bulk storage terminals (for liquids) and natural gas distribution systems. Transmission pipelines are downstream from gathering pipelines
29、 (which aggregate gas and liquids from producing areas, for further transmission). Transmission pipelines typically occupy long right of ways. This recommended practice (RP) does not address construction activities in close proximity to distribution systems (which distribute gas through a network of
30、 smaller, local pipelines for residential and commercial use). Outside force damage to underground pipelines and other underground facilities can occur during construction activities, including but not limited to excavation activities. Significant challenges are faced by existing facility owners and
31、 operators, line locators, design professionals, one-call center employees, excavators and contractors, and other stakeholders to prevent damage to underground facilities during construction. These challenges are magnified when construction occurs parallel to existing underground facilities. Paralle
32、l construction in this environment requires enhanced communication and coordination to avoid excavation damage.Damage prevention is a shared responsibility.This RP is intended to address the unique challenges for damage prevention posed by construction of any project parallel to an existing undergro
33、und hazardous liquid or gas transmission pipeline (a.k.a. “transmission pipelines”), by providing guidance to designers, constructors, operators, and regulators to reduce risks and improve the safety of affected people, property, the environment, and pipelines. Advanced planning, continuous communic
34、ation, use of one-call systems, accurately locating and marking facilities, safe digging practices, and other tactics are expected to reduce construction related damage.Representatives from natural gas and liquid petroleum transmission companies, local distribution companies, gathering systems, and
35、the U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration (U.S. DOT PHMSA), together with respective trade associations (AGA, AOPL, API, and INGAA), have developed this RP. The working group was formed in early 2012. This RP has been developed specifically for the
36、protection of carbon dioxide and energy transmission pipelines operating in the United States, but it may also have use in the protection of other underground facilities. Certain Common Ground Alliance (CGA) Best Practices and Pipelines and Informed Planning Alliance (PIPA) RPs may also enhance comm
37、unications and coordination of construction parallel to existing pipelines. Readers are encouraged to become aware of and implement the respective practices where appropriate. Some of these practices are referenced in this document. This document contains practices in addition to those required or r
38、ecommended by CGA or PIPA. This RP is composed of a main body and annexes. The main body of this document contains the general recommendations. The annexes provide additional information and resources.1Transmission pipeline systems can be classified as either “intrastate pipelines,” located within o
39、ne states borders, or “interstate pipelines” crossing more than one states borders. vii1Recommended Practice for Construction Parallel to Existing Underground Transmission Pipelines1 ScopeConstruction activities parallel to existing transmission pipelines, for any distance, are the focus of this rec
40、ommended practice (RP). Activity of concern includes construction activity that could impact an existing facility, such as excavation or movement of equipment across the pipeline or within the easement that could affect the safe operation of the existing pipeline. This RP is intended as a resource t
41、o assist all parties to safely manage construction activities of new or modified facilities parallel to existing underground transmission pipelines. Legislation and regulation related to excavation damage prevention varies by jurisdiction. For example, damage prevention regulations in Texas are diff
42、erent than in Louisiana. This RP shall not be construed as proposing deviation from any jurisdictional requirements. Likewise, nothing in this RP prevents the parties from agreeing to additional or more stringent measures, regardless of minimum regulatory expectations. The primary emphasis of these
43、guidelines is on the interaction between existing transmission pipeline operators and those planning to construct in a parallel fashion. These activities may involve many different parties. Contractors working on behalf of the constructing party, including environmental and survey professionals, des
44、ign engineers, construction contractors, and operators of excavation and earth moving equipment, should engage in work practices that are in conformance with these guidelines, and apply vigilance in identifying unanticipated circumstances that may indicate a problem. This RP refers to all of these e
45、ntities as the “constructing party.” These guidelines have been developed such that they can be incorporated into contract documents executed with contractors and subcontractors by whichever party is involved in or responsible for construction activities.2 Normative ReferencesNo other document is id
46、entified as indispensable or required for the application of this standard.3 Terms, Definitions, Acronyms, and Abbreviations3.1 Terms and DefinitionsFor the purposes of this document, the following definitions apply.3.1.1 areasA measured distance from the existing transmission pipeline.3.1.1.1 activ
47、e excavation areaAn area where the edge of the construction activities (including, but not limited to, excavation) is within 25 ft of the centerline of existing pipeline facilities, unless site-specific conditions require additional clearance. 3.1.1.2 encroachment area 1The area where the impact of
48、proposed construction activity is within 50 ft of the centerline of the existing facility, or within the existing pipeline facilitys right-of-way (ROW) or other easement, whichever is greater. 3.1.2 corridorStrip of land were a proposed facility is to be located.1The definition of “encroachment” app
49、lies only to this document and is not a legal definition.2 API RECOMMENDED PRACTICE 11723.1.2.1 survey corridorThe corridor width typically used for biological surveys or environmental impact statements, which should be wide enough to include the potential routes that the proposed project could reasonably be expected to take, including the potentially impacted surrounding areas by project reroutes or temporary construction activities. NOTE The survey corridor width may vary from 100 ft to 1000 ft or more, based on the existence of wetlands, vegetative cover, topography, geology, pipe
