ASTM F905-2004(2011) Standard Practice for Qualification of Polyethylene Saddle-Fused Joints《聚乙烯鞍形熔融接头质量鉴定规程》.pdf

1、Designation: F905 04 (Reapproved 2011)An American National StandardStandard Practice forQualification of Polyethylene Saddle-Fused Joints1This standard is issued under the fixed designation F905; the number immediately following the designation indicates the year of originaladoption or, in the case

2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice describes test criteria suitable for qualifi-cation of polyethylene saddle-fuse

3、d joints. These tests may beconducted by suppliers or users to qualify saddle-fused jointsin accordance with the requirements found in the Departmentof Transportation (DOT) Code of Federal Regulations (CFR)Title 49, Part 192.283. At the discretion of the end user, thesetests may also be conducted by

4、 users to qualify personnelmaking saddle fusion joints per DOT CFR 49, Part 192.285.1.2 The impact resistance test described is a nonstandardtest. This is not the only test that may be used to qualify saddlefusion joints per DOT regulations.1.3 The values stated in inch-pound units are to be regarde

5、das the standard. The values given in parentheses are mathemati-cal conversion to SI units that are provided for informationonly and are not considered standard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the us

6、er of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD2513 Specification for Po

7、lyethylene (PE) Gas PressurePipe, Tubing, and FittingsD2683 Specification for Socket-Type Polyethylene Fittingsfor Outside Diameter-Controlled Polyethylene Pipe andTubingD3261 Specification for Butt Heat Fusion Polyethylene(PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe andTubing2.2 DOT Doc

8、ument:49 CFR, Part 192, Minimum Federal Safety Standards forGaslines32.3 PPI Technical Report:TR-41/2002 Generic Saddle Fusion Joining Procedure forPolyethylene Gas Piping3. Significance and Use3.1 The tests described in this practice are intended topresent a method of satisfying the requirements of

9、 DOT CFRTitle 49, Parts 192.283 and 192.285.3.2 The sustained pressure test is intended to meet the bursttest requirements of Part 192.283.3.3 The impact resistance test is intended to meet the forcerequirements of Part 192.283 as follows:3.3.1 “. . . For procedures intended for lateral pipe connec-

10、tions, subject a specimen joint made from pipe sections joinedat right angles according to the (joining) procedure to a forceon the lateral pipe until failure occurs in the specimen. Iffailure initiates outside the joint area, the (joining) procedurequalifies for use.”4. Materials4.1 Pipe and fittin

11、gs shall meet the requirements of Speci-fication D2513.4.2 The outlet portion of a saddle fitting shall conform toSpecification D2683 for socket-fusion outlets or SpecificationD3261 for butt-fusion outlets.4.3 The radius of the saddle portion of the fitting shall fit thepipe size to which it is inte

12、nded to be joined. The surfacecontact area of the saddle portion of the fitting and thethickness of saddle portion shall be sufficient to meet thequalification requirements of this practice.4.4 Qualification tests shall be conducted on all saddlefittings with different base areas. Only the largest o

13、utletdiameter shall be tested per fitting type if base areas are thesame.5. Procedure5.1 General:5.1.1 Conduct each qualification test with the polyethylenesaddle fitting fused to a polyethylene pipe that has a maximum1This practice is under the jurisdiction of ASTM Committee F17 on PlasticPiping Sy

14、stems and is the direct responsibility of Subcommittee F17.60 on Gas.Current edition approved April 1, 2011. Published June 2011. Originallyapproved in 1984. Last previous edition approved in 2004 as F905 04. DOI:10.1520/F0905-04R11.2For referenced ASTM standards, visit the ASTM website, www.astm.or

15、g, orcontact 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,

16、DC 20401, http:/www.access.gpo.gov.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.pressure rating equal to or greater than that for which the gasdistribution system is designed.NOTE 1It is recommended that the Generic Saddle Fusion

17、JoiningProcedure, developed by PPI (TR-41/2002), be used for selected polyeth-ylene gas piping products. While other joining procedures can also beused, the use of this PPI procedure is intended to help DOT expedite thequalification of gas pipeline operators and add some uniformity to theindustry.5.

18、1.2 Allow the saddle-fused joint to cool to room tempera-ture prior to testing.5.1.3 For each qualification test, tap the polyethylene pipewith the largest size hole used in the gas distribution system forthat fitting.5.1.4 Quantity of specimens to be tested in each testdescribed in this practice ha

19、s been omitted due to the variedgoals of users of these tests. When these tests are utilized forqualification of a joining procedure (Part 192.283), a minimumof six specimens should be evaluated with each test type used.For qualification of a joiner (Part 192.285), a minimum of onespecimen should be

20、 evaluated for each test type used. Forqualification of the joint design by the manufacturer, as manytests as are needed may be run, but not less than six of each testtype.5.2 Sustained Pressure Test:5.2.1 The minimum length of unreinforced pipe on bothsides of any saddle fitting shall be equal to t

21、hree times thediameter of the pipe, but in no case less than 12 in. (305 mm).Test multiple saddle fittings, if desired, on the same pipespecimen as long as they are separated by at least three pipediameters. Make all saddle-fused joints with the pipe at themaximum allowable operating pressure of the

22、 gas distributionsystem. If tubing intended to be fused to the outlet of the saddlefitting has a higher SDR than the pipe, cap the saddle fittingoutlet and do not use the tubing.5.2.2 Test specimens for 1000 h using the equipment,procedures, and failure definition as specified in Test MethodD1598 at

23、 23C (73F). Hold systems having a hydrostaticdesign basis of 1250 psi (8.6 MPa) at a hoop stress of 1320 psi(9.1 MPa) based on the actual pipe dimensions. Hold systemshaving a hydrostatic design basis of 1600 psi (11.0 MPa) at ahoop stress of 1600 psi (11.0 MPa) based on the actual pipedimensions.5.

24、3 Impact Resistance Test:5.3.1 Center and fuse the saddle fitting on a piece ofunreinforced pipe that has a minimum length on both sides ofany saddle fitting equal to three times the diameter of the pipe,but in no case less than 12 in. (305 mm).5.3.1.1 Firmly secure the pipe so that movement does no

25、toccur during impact. Suggested methods of securing the pipeare shown in Fig. 1. Other methods for securing the pipe mayalso be used.5.3.2 Drop a weight in a vertical free-fall from a height of atleast 10 in. (250 mm). Position the weight so that it strikes thestack of the saddle fitting 2 in. (50 m

26、m) from the pipe. For largediameter saddle fittings, that is, 3-in. (76-mm) outlet or greater,socket or butt fuse a nipple (whose length is five times theoutside diameter) to the outlet and position the weight so thatit strikes the center of the nipple. Adjust the drop height orweight, or both, unti

27、l failure occurs in the specimen by eithertearing out the pipe wall, tearing the fitting, or bending thenipple at least 45 from the horizontal axis. Conduct impactevaluations on large diameter saddle fittings in two ways: (1)with the pipe parallel (axial) to the vertical path of the fallingweight; a

28、nd (2) with the pipe perpendicular (radial) to the pathof the falling weight. The fused joint made between the pipeand saddle fitting shall not fail when impacted with a forcesufficient to break the body or other portion of the specimens.Tests of 500 ftlbf or higher impact with no failures shall bec

29、onsidered as “pass.”NOTE 2Specimens that appear to fail at the joint may actually betearing out the pipe wall. If the failure mode is questionable, the fittingsupplier should be consulted.FIG. 1 Suggested Methods of Securing Pipe AssemblyF905 04 (2011)26. Qualification Requirements6.1 Qualification

30、requirements are outlined in DOT CFRTitle 49, Part 192.283.7. Precision and Bias7.1 The impact test described in this practice is a nonstan-dard test. Reproducibility between test laboratories is notrequired because the end result of this test is qualitative (that is,a type of failure mode), not qua

31、ntitative. A precision and biasstatement is, therefore, not required for this nonstandard test.8. Keywords8.1 fusion; joints; polyethylene; qualification; saddleASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this sta

32、ndard. Users of this standard 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 revi

33、ewed every five years andif 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 theresponsib

34、le technical committee, which 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 Co

35、nshohocken, 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F905 04 (2011)3