ASTM F905-2004 Standard Practice for Qualification of Polyethylene Saddle-Fused Joints《聚乙烯鞍形熔融接头的合格证明的标准实施规程》.pdf

1、Designation: F 905 04An American National StandardStandard Practice forQualification of Polyethylene Saddle-Fused Joints1This standard is issued under the fixed designation F 905; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the

2、 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 describes test criteria suitable for qualifi-cation of polyethylene saddle-fused joints. These

3、 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 users to quali

4、fy 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 regardedas the standar

5、d. 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 user of this stan

6、dard 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:2D 1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD 2513 Specification for Thermoplastic G

7、as Pressure Pipe,Tubing, and FittingsD 2683 Specification for Socket-Type Polyethylene Fittingsfor Outside Diameter-Controlled Polyethylene Pipe andTubingD 3261 Specification for Butt Heat Fusion Polyethylene(PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe andTubing2.2 DOT Document:49 CFR, P

8、art 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 DOT CFRTitle 4

9、9, 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-tions, subject

10、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 fittings shall meet t

11、he requirements of Speci-fication D 2513.4.2 The outlet portion of a saddle fitting shall conform toSpecification D 2683 for socket-fusion outlets or SpecificationD 3261 for butt-fusion outlets.4.3 The radius of the saddle portion of the fitting shall fit thepipe size to which it is intended to be j

12、oined. 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 outletdiamete

13、r shall be tested per fitting type if base areas are thesame.5. Procedure5.1 General:1This practice is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.Current edition approved Sept. 1, 2004. Published September 2004

14、. Originallyapproved in 1984. Last previous edition approved in 2003 as F 905 03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page

15、 onthe ASTM website.3Available from the Superintendent of Documents, U.S. Government PrintingOffice, Washington, DC 20402.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.1.1 Conduct each qualification test with the polyethylenesadd

16、le fitting fused to a polyethylene pipe that has a maximumpressure rating equal to or greater than that for which the gasdistribution system is designed.NOTE 1It is recommended that the Generic Saddle Fusion JoiningProcedure, developed by PPI (TR-41/2002), be used for selected polyeth-ylene gas pipi

17、ng 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.5.1.2 Allow the saddle-fused joint to cool to room tempera-ture prior to testing.5.1.3 For eac

18、h 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 has been omitted due to the variedgoals of users of these tests. When these tests are utilized

19、 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 evaluated for each test type used. Forqualification of the joint design by the manufacturer

20、, 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 three times thediameter of the pipe, but in no case less than 12 in. (305 mm).Test multiple s

21、addle 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 gas distributionsystem. If tubing intended to be fused to the outlet of the saddlefitting h

22、as 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 MethodD 1598 at 23C (73F). Hold systems having a hydrostaticdesign basis of 1250 psi (8.6 MPa) at a hoop s

23、tress 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.5.3 Impact Resistance Test:5.3.1 Center and fuse the saddle fitting on a piece ofunreinforced

24、 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 notoccur during impact. Suggested methods of securing the pipeare shown in Fig. 1. Other meth

25、ods 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 mm) from the pipe. For largediameter saddle fittings, that is, 3-in. (76-mm) outlet or great

26、er,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, until failure occurs in the specimen by eithertearing out the pipe wall, tearing the fitting, o

27、r 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; and (2) with the pipe perpendicular (radial) to the pathof the falling weight. The fused joi

28、nt 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 beconsidered as “pass.”NOTE 2Specimens that appear to fail at the joint may actually beFIG. 1

29、Suggested Methods of Securing Pipe AssemblyF905042tearing out the pipe wall. If the failure mode is questionable, the fittingsupplier should be consulted.6. Qualification Requirements6.1 Qualification requirements are outlined in DOT CFRTitle 49, Part 192.283.7. Precision and Bias7.1 The impact test

30、 described in this practice is a nonstand-ard test. Reproducibility between test laboratories is notrequired because the end result of this test is qualitative (that is,a type of failure mode), not quantitative. A precision and biasstatement is, therefore, not required for this nonstandard test.8. K

31、eywords8.1 fusion; joints; polyethylene; qualification; saddleASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such

32、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 andif not revised, either reapproved or withdrawn. Your comments are invited

33、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, which you may attend. If you feel that your comments have not received a fa

34、ir 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).F905043