1、Designation: C 444M 03METRICStandard Specification forPerforated Concrete Pipe Metric1This standard is issued under the fixed designation C 444M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number i
2、n parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers perforated concrete pipe in-tended
3、to be used for underdrainage.1.2 This specification is the metric counterpart of Specifi-cation C 444.2. Referenced Documents2.1 ASTM Standards:C 822 Terminology Relating to Concrete Pipe and RelatedProducts23. Terminology3.1 DefinitionsFor definitions of terms relating to con-crete pipe, see Termin
4、ology C 822.4. Classification4.1 Pipe manufactured to this specification shall be of twoclasses, Type 1 and Type 2, describing two arrangements ofperforations for pipe manufactured to the standard specifica-tions for plain or reinforced concrete pipe, and their classifi-cations.4.1.1 Type 1 perforat
5、ed pipe shall have circular perforationsconforming to 6.1 and Table 1.4.1.2 Type 2 perforated pipe shall have slotted perforationsconforming to 6.2 and Table 2.4.1.3 It is intended that perforated pipe shall be specified byreference to this specification and the specification for the typeand class o
6、f pipe desired.NOTE 1Example: “Perforated concrete pipe shall conform to therequirements of Specification C 444M Type 2, and all applicable require-ments of Specification C 14M, Class 2.”5. Basis of Acceptance5.1 The acceptability of the pipe shall be determined by theresults of all applicable tests
7、 (Note 2) prescribed for the typeand class of pipe specified, and by inspection to determinewhether the pipe conforms to this specification as to design andfreedom from defects.1This specification is under the jurisdiction of ASTM Committee C13 onConcrete Pipe and is the direct responsibility of Sub
8、committee C13.01 onNonreinforced Concrete Sewer, Drain, and Irrigation Pipe.Current edition approved January 10, 2003. Published June 2003. Originallyapproved in 1980. Last previous edition approved in 1995 as C 444M 95.2Annual Book of ASTM Standards, Vol 04.05.TABLE 1 Number of Rows of Perforations
9、 RequiredInternal DesignatedDiameter,mmRows of Perforations100 4150 4200 4250 6300 6350 6375 6400 6450 8500 8525 8600 8675 and larger space rows approximately 150 mmTABLE 2 Requirements for Length and Spacing of SlotsInternal DesignatedDiameter,mmSlot Length,mmSlot Spacing,Amm100 25 75150 38 75200 5
10、0 100250 50 100300 75 150350 75 150375 75 150400 75 150450 75 150500 75 150525 75 150600 75 150675 and larger 100 150ASee 6.2 for exceptions for plain-end pipe.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 2It is intended that
11、 all tests will be applicable except thosehaving to do with permeability and the hydrostatic test.6. Perforations6.1 Type 1Perforations shall be circular, not more than 8mm or less than 5 mm in diameter, and arranged in rowsparallel to the axis of the pipe. Perforations shall be 75 mmcenter-to-cente
12、r, along rows. The spigot or tongue end shall notbe perforated for a length equal to the depth of the socket, ordepth of the groove plus 19 mm and perforations shall continueat uniform spacing along the length of the barrel. The numberof rows shall be as shown in Table 1. The rows shall be spacedove
13、r not more than 165 of circumference. Rows shall besymmetrically arranged with respect to the intended top orbottom of the pipe.6.2 Type 2Slots shall be circumferential in direction, notmore than 5 mm or less than 3 mm in width, and of the lengthsshown in Table 2. There shall be two rows of slots, s
14、paced 165apart, and centered, in the case of elliptically reinforced pipe,about the minor axis of the reinforcing. Slots shall be spaced asshown in Table 2, except as modified herein for plain-end pipe.The distance from the spigot end, or from the shoulder of thetongue end, to the first pair of slot
15、s shall be not more than 25mm greater than the specified slot spacing, nor less than 25 mmless than the specified slot spacing. Slots shall continue atuniform spacing along the length of the barrel.6.2.1 Slots in plain-end pipe shall be spaced as shown inTable 2 except that smaller spacing shall be
16、used wherenecessary to provide not less than three equally spaced slots ineach row. Slots shall be centered with respect to the ends of thepipe and there shall be not more than the specified slot spacingfrom the pipe end to the first pair of slots, or less than one halfof the slot spacing employed.6
17、.3 The manufacturer shall submit to the owner for ap-proval, prior to manufacture, sizes and arrangements of perfo-rations other than specified herein.7. Joints7.1 The joints shall be of such design and the ends of theconcrete pipe sections so formed that the pipe can be laidtogether to make a conti
18、nuous line of pipe compatible with thepermissible variations given in Section 8.8. Permissible Variation in Dimensions8.1 The permissible variation in circular perforation size orslot width shall be as specified in Section 6. Slot lengthtolerance is + 6 mm or 3 mm. Variation in row spacing, or inthe
19、 spacing of holes or slots in any row, shall be 613 mmexcept as required to provide specified cover for reinforcingsteel.9. Repairs9.1 Pipe repaired because of imperfections in manufactureor damage during handling will be acceptable, if in the opinionof the owner, the repairs are sound and properly
20、finished andcured and the repaired pipe conforms to the requirements ofthis specification.10. Marking of Rejected Specimens10.1 All rejected pipe shall be marked clearly by the ownerand shall be replaced by the manufacturer with pipe that willmeet the requirement of this specification, without addit
21、ionalcost to the owner.11. Inspection11.1 The quality of all materials and the finished pipe shallbe subject to inspection and approval by the owner. Suchinspection shall be performed at the point of manufacture ordelivery. The method of marking as to acceptance or rejectionof the pipe shall be agre
22、ed upon, prior to inspection, betweenthe owner and manufacturer. Rejected pipe shall be replaced bythe manufacturer with pipe that meets the requirements of thisspecification.12. Rejection12.1 Pipe shall be subject to rejection due to any of theapplicable causes for rejection listed for the type and
23、 class ofpipe specified, or any of the following:12.1.1 Variations in dimensions exceeding those specified inSections 6 and 8, or12.1.2 Spalls more than 19 mm in diameter or 5 mm indepth caused by making perforations or slots.13. Keywords13.1 concrete pipe; perforated; subsurface drainage;underdrain
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27、ittee 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).C444M032
