1、Designation: F 2350 04Standard Practice forSelection of Natural Gas Pipelines Suitable for Installationof Optical Fiber Systems1This standard is issued under the fixed designation F 2350; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis
2、ion, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice specifically addresses the criteria fordetermining the suitability of natural gas pipe
3、lines for use asconduits for optical fiber cable systems, as opposed to stan-dards for the operation and maintenance of such a system.1.2 The values stated in inch-pound units are to be regardedas the standard. The values provided in parentheses are forinformation purposes only.1.3 This practice doe
4、s not apply to natural gas transmissionlines.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regula
5、tory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 1600 Terminology for Abbreviated Terms Relating toPlasticsF 412 Terminology Relating to Plastic Piping Systems2.2 Other References:3Code of Federal Regulations (CFR) 49, Part 192 Transpor-tation of Natural or other Gas by Pip
6、eline, MinimumFederal Safety Standards3. Terminology3.1 Definitions are in accordance with Terminology F 412and abbreviations are in accordance with Terminology D 1600,unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 distribution linea pipeline other than a gatheri
7、ng ortransmission line.3.2.2 gasnatural gas.3.2.3 high-pressure distribution systema distribution sys-tem in which the gas pressure in the main is higher than thepressure normally provided to the customer (that is, higher thanutilization pressure).3.2.4 installerthe person(s) or body installing the
8、opticalfiber system within the natural gas pipeline.3.2.5 local distribution company (LDC)the owner/operator of the natural gas piping system within a specificgeographic area.3.2.6 low-pressure distribution systema distribution sys-tem in which the gas pressure in the main is substantially thesame a
9、s the pressure provided to the customer.3.2.7 maina distribution line that serves as a commonsource of supply for more than one service line.3.2.8 maximum actual operating pressurethe maximumpressure that occurs during normal operations over a period ofone year.3.2.9 maximum allowable operating pres
10、sure (MAOP)themaximum pressure at which a pipeline or segment of a pipelinemay be operated under CFR 49, part 192.3.2.10 optical fiber cablea cable formed of one or morestrands of optical fiber for transmission of data, video, audio,voice, and other information.3.2.11 optical fiber systema group of
11、components thatcomprises the elements necessary to enable Optical FiberCable to be installed, maintained, and operated inside a gaspipeline.3.2.12 operatora person who engages in the transporta-tion of gas.3.2.13 pipe (piping)any pipe or tubing used in the trans-portation of gas.3.2.14 pipelineall p
12、arts of those physical facilitiesthrough which gas moves in transportation, including pipe,valves, and other appurtenance attached to pipe, compressorunits, metering stations, regulator stations, delivery stations,holders, and fabricated assemblies.1This practice is under the jurisdiction of ASTM Co
13、mmittee F36 on Technologyand Underground Utilities and is the direct responsibility of Subcommittee F36.40on Deployment of Optical Fiber Systems in Natural Gas Pipelines.Current edition approved July 1, 2004. Published July 2004.2For referenced ASTM standards, visit the ASTM website, www.astm.org, o
14、rcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 2
15、0401.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.15 service linea distribution line that transports gasfrom a common source of supply to a customer meter or theconnection to a customers piping, whichever is farther down-strea
16、m.3.2.16 transmission linea pipeline, other than a gatheringline, that: (a) Transports gas from a gathering line or storagefacility to a distribution center, storage facility, or large volumecustomer that is not downstream from a distribution center; or(b) Operates at a hoop stress of 20 % or more o
17、f SMYS.4. Summary of Practice4.1 The optical fiber systems in existing gas pipelines shallbe designed and installed so that they have a minimal effect onpipeline performance, and current and future gas deliverycapability, and no effect on their structural integrity. Theirdesign and installation shal
18、l also allow for the safe and efficientoperation and maintenance of the pipeline, and provide for thesafe and efficient operation of the optical fiber system. The firststep in the evaluation process is an analysis of the capacity ofthe gas piping to confirm available capacity for the installationof
19、an optical fiber system. The ultimate success of theinstallation and operation of both the optical fiber and gaspipeline systems depends upon the proper evaluation andselection of appropriate pipelines. The steps in the selectionprocess include evaluation of the following items:4.1.1 Pipeline integr
20、ity and useful life,4.1.2 Standards for installed components,4.1.3 Standards for gas quality,4.1.4 Standards for the safe use of optical fibers in flam-mable atmospheres,4.1.5 Determine franchise and right of way impacts,4.1.6 Installation of the optical fiber system,4.1.6.1 Confirming the pipeline
21、networks capacity,4.1.6.2 Selection of pipeline,4.1.6.3 Determine custody/ownership transfer point,4.1.6.4 Installation of the optical fiber system, and4.1.7 Documentation of cable routing.5. Significance and Use5.1 This practice is intended to assist engineers, LDCs andinstallers in determining the
22、 suitability of gas pipelines for asecondary use as carriers for optical fiber systems. It must bekept in mind that the primary use of the gas pipelines is todeliver natural gas to the end customer. Any secondary use ofthe system shall have minimal impact on its primary function.It is up to the engi
23、neer to decide upon the order of operationsand any exceptions that may be involved in the selectionprocess.5.2 Before the selection procedure begins, the LDC musthave developed an explicit agreement authorizing an installerto place optical fiber cables within their piping system.5.3 The relevant LDC
24、 engineers should also be cognizant ofhow the installation of optical fiber cable will impact the futuregas deliverability, operation, maintenance, and rehabilitationneeds of the pipelines to be used as carriers of optical fibersystems.6. Selection of Pipeline6.1 The following is a list of issues an
25、d criteria to considerwhen selecting a gas pipeline for use as a carrier of optical fiberconduit or cable, or both:6.1.1 Gas QualityFree or disassociated hydrogen at highconcentrations in the gas stream may affect optical fibersystems by diffusion through polyethylene components. Theoperator or opti
26、cal fiber owner should confirm gas quality inrelation to the optical fiber system being used, to ensure thatthere will be no interference from hydrogen.6.1.2 Franchise ImpactsThe LDC operator should con-firm the terms of their franchise agreement to determine if theinsertion of optical fiber systems
27、 is permitted under thatagreement. Similarly, easements that are part of a planned routeshould be examined to confirm that they allow the gas operatorto install an optical fiber system.6.1.3 Pipeline CapacityThe operator should conduct anetwork analysis to confirm that any loss of capacity from useo
28、f an optical fiber system does not hinder current or near-futurepeak day deliverability to customers, and that any bypassing orsystem pressure reduction required during installation will notaffect that particular seasons gas deliverability.6.1.4 Maximum Operating Pressure of the System andRatings of
29、 the Optical Fiber SystemThis confirms that thesystem components or their installation methods do not exceedtheir pressure ratings.6.1.5 Number and Position of ValvesThe ability to installstraight runs may be important for project economics. Know-ing where valves are installed will allow planning to
30、 circum-vent the valves, or to reposition them to maximize installationeffectiveness.6.1.6 Number and Position of Elbows and Other FittingsThe optical fiber system installation may have difficulty navi-gating certain elbows or fittings (especially if there are drips,and so forth). It will be importa
31、nt to identify those fittings forconstruction planning purposes.6.1.7 Method of Attaching Installation FittingsSome op-tical fiber systems may be optimized for a certain gas pipingmaterial. The need for transition, or different fittings will needto be identified, and relevant planning undertaken.6.1
32、.8 Determine Custody/Ownership Transfer PointIssuesAny agreements with installers/owners of an opticalfiber system should clearly define the ownership transfer point;that is, the point at which the facility no longer belongs to theLDC, but to the operator of the optical fiber system. Typicallythis w
33、ill also be the demarcation of responsibility for operationand maintenance of the optical fiber system.6.1.9 Impact on Pipeline IntegrityAs with any operationon or attachment to a gas pipeline system, the impact onshort-and long-term pipeline integrity must be considered.Careful attention should be
34、paid to plastic pipeline made frommaterial that is susceptible to brittle cracking, unprotected steeland older cast-iron pipes.6.1.10 Pipeline Integrity Monitoring RequirementsGaspipelines may be required to be assessed for structural integrityon a periodic basis. The optical fiber system installati
35、on shallnot preclude these types of inspections.F23500427. Keywords7.1 conduits; criteria; installation; natural gas; pipeline;selectionASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this stan
36、dard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and
37、if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, w
38、hich you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F2350043
