1、Designation: A795/A795M 08 (Reapproved 2012)A795/A795M 13Standard Specification forBlack and Hot-Dipped Zinc-Coated (Galvanized) Welded andSeamless Steel Pipe for Fire Protection Use1This standard is issued under the fixed designation A795/A795M; the number immediately following the designation indi
2、cates the yearof original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers black and hot-d
3、ipped galvanized welded and seamless steel pipe in NPS 1/2 to NPS 10, inclusiveDN 15 to DN 250, inclusive (Note 1), with wall thicknesses as given in Table 1 and Table 2. Pipe having other wall thicknessesmay be furnished provided such pipe complies with all other requirements of this specification
4、and the outside diameter is as givenin Table 2. Pipe ordered under this specification is intended for use in fire protection systems. The pipe may be bent, but it is notintended for bending made at ambient temperature wherein the inside diameter of the bend is less than twelve times the outsidediame
5、ter of the pipe being bent (Note 2).NOTE 1The dimensionless designators NPS (nominal pipe size) and DN (nominal diameter) have been substituted in this standard for such traditionalterms as “nominal diameter,” “size,” and “nominal size.”NOTE 2Successful bending of pipe is a function of equipment and
6、 technique as well as pipe properties.1.2 This pipe is suitable for joining by the following methods:1.2.1 Light-Weight Fire Protection Pipe Rolled groove, welding, and fittings for plain end pipe. See Table 1 for dimensions.1.2.2 Standard-Weight Fire Protection PipeCut or rolled groove, threading,
7、welding, and fittings for plain end pipe. See Table2 for dimensions.1.2.3 For pipe having dimensions other than those of Table 1 and Table 2, the joining method must be compatible with the pipedimensions. A complete listing of standard light weight dimensions appears in ASME B36.10 and B36.19.1.3 Th
8、e following safety hazards caveat pertains only to the test method portion, Sections 8, 9, and 10, of this specification:Thisstandard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate
9、 safety and health practices and determine the applicability of regulatory limitations priorto use.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system may not be e
10、xact equivalents; therefore, each system shall be usedindependently of the other. Combining values from the two systems may result in non-conformance with the standard.2. Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating on Iron and Steel Articles with Zinc or Z
11、inc-Alloy CoatingsA700 Practices for Packaging, Marking, and Loading Methods for Steel Products for ShipmentA751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsA865 Specification forThreaded Couplings, Steel, Black or Zinc-Coated (Galvanized)Welded or Seamless, for U
12、se in Steel PipeJointsB6 Specification for ZincE213 Practice for Ultrasonic Testing of Metal Pipe and TubingE309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic SaturationE570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products1 This specifica
13、tion is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.09on Carbon Steel Tubular Products.Current edition approved Sept. 1, 2012May 1, 2013. Published November 2012June 2013. Originally approved in 1982. La
14、st previous edition approved in 20082012 asA795/A795M08. 08 (2012). DOI: 10.1520/A0795_A0795M-08R12.10.1520/A0795_A0795M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, re
15、fer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all c
16、hanges accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100
17、Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.2 ASME Standards:B1.20.1 Pipe Threads, General Purpose, Inch3B36.10 Welded and Seamless Wrought Steel Pipe3B36.19 Stainless Steel Pipe32.3 Federal Standard:Fed. Std. No. 123 Marking for Shipments (Civil Agencies)42.4 M
18、ilitary Standards:MIL-STD-129 Marking for Shipment and Storage4MIL-STD-163 Steel Mill Products, Preparation for Shipment and Storage43. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 defectan imperfection of sufficient size or magnitude to be cause for rejection.3 Available from
19、 American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.4 Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.TABLE 1 Dimensions, Wei
20、ghts, and Test Pressure For Light-Weight Fire Protection PipeSchedule 10ANPSDesignatorDNDesignatorOutside Diameter Nominal Wall Thickness Weight Plain EndTest PressureFurnace-WeldedSeamless andElectric-Resistance-Weldedin. mm in. mm lb/ft kg/m psi kPa psi kPa34 20 1.050 26.7 0.083 2.11 0.86 1.28 500
21、 3400 700 48001 25 1.315 33.4 0.109 2.77 1.41 2.09 500 3400 700 4800114 32 1.660 42.2 0.109 2.77 1.81 2.69 500 3400 1000 6900112 40 1.900 48.3 0.109 2.77 2.09 3.11 500 3400 1000 69002 50 2.375 60.3 0.109 2.77 2.64 3.93 500 3400 1000 6900212 65 2.875 73.0 0.120 3.05 3.53 5.26 500 3400 1000 69003 80 3
22、.500 88.9 0.120 3.05 4.34 6.46 500 3400 1000 6900312 90 4.000 101.6 0.120 3.05 4.98 7.41 500 3400 1200 83004 100 4.500 114.3 0.120 3.05 5.62 8.37 500 3400 1200 83005 125 5.563 141.3 0.134 3.40 7.78 11.58 B B 1200 83006 150 6.625 168.3 0.134 3.40 9.30 13.85 B B 1000 69008 200 8.625 219.1 0.188C 4.78
23、16.96 25.26 B B 800 550010 250 10.750 273.1 0.188C 4.78 21.23 31.62 B B 700 4800A Schedule 10 corresponds to Schedule 10S as listed in ANSI B36.19 for NPS 34 through 6 DN 20 through 150 only.B Furnace-welded pipe is not made in sizes larger than NPS 4 DN 100.C Not Schedule 10.TABLE 2 Dimensions, Wei
24、ghts, Test Pressures For Standard-Weight Fire Protection PipeSchedule 30 and Schedule 40NPSDesignatorDNDesignatorSpecified OutsideDiameterNominal WallThicknessA Weight Plain EndWeight Threadedand CoupledBTest PressureFurnace-WeldedSeamless andElectric-Resistance-Weldedin. mm in. mm lb/ft kg/m lb/ft
25、kg/m psi kPa psi kPa12 15 0.840 21.3 0.109 2.77 0.85 1.27 0.85 1.27 700 4800 700 480034 20 1.050 26.7 0.113 2.87 1.13 1.69 1.13 1.68 700 4800 700 48001 25 1.315 33.4 0.133 3.38 1.68 2.50 1.68 2.50 700 4800 700 4800114 32 1.660 42.2 0.140 3.56 2.27 3.39 2.28 3.40 1000 6900 1000 6900112 40 1.900 48.3
26、0.145 3.68 2.72 4.05 2.73 4.07 1000 6900 1000 69002 50 2.375 60.3 0.154 3.91 3.66 5.45 3.69 5.50 1000 6900 1000 6900212 65 2.875 73.0 0.203 5.16 5.80 8.64 5.83 8.68 1000 6900 1000 69003 80 3.500 88.9 0.216 5.49 7.58 11.29 7.62 11.35 1000 6900 1000 6900312 90 4.000 101.6 0.226 5.74 9.12 13.58 9.21 13
27、.71 1200 8300 1200 83004 100 4.500 114.3 0.237 6.02 10.80 16.09 10.91 16.25 1200 8300 1200 83005 125 5.563 141.3 0.258 6.55 14.63 21.79 14.82 22.07 C C 1200 83006 150 6.625 168.3 0.280 7.11 18.99 28.29 19.20 28.60 C C 1200 83008 200 8.625 219.1 0.277A 7.04 24.72 36.82 25.57 38.09 C C 1200 830010 250
28、 10.750 273.1 0.307A 7.80 34.27 51.05 35.78 53.29 C C 1000 6900A NPS 12 through 6 DN 15 through 150Schedule 40; NPS 8 and 10 DN 200 and 250Schedule 30.B Based on 20-ft 6.1-m lengths.C Furnace-welded pipe is not made in sizes larger than NPS 4 DN 100.A795/A795M 1323.1.2 imperfectionany discontinuity
29、or irregularity found in the pipe.4. Classification4.1 Pipe may be furnished in the following types (Note 3):4.1.1 Type FFurnace-butt welded, continuous welded,4.1.2 Type EElectric-resistance-welded, or4.1.3 Type SSeamless.NOTE 3See Annex A1 for definitions of the types of pipe.5. Ordering Informati
30、on5.1 Orders for material under this specification should include the following, as required, to describe the desired materialadequately:5.1.1 Quantity (feet, metres, or number of lengths),5.1.2 Name of material (steel pipe),5.1.3 Type (seamless, electric-resistance-welded, or furnace-welded),5.1.4
31、Grade (seamless and electric-resistance-welded only),5.1.5 Size (NPS or DN designator and weight class; standard weight or light weight; or outside diameter) and wall thickness(Table 1 and Table 2),5.1.6 Finish (black, galvanized, or other type of coating as specified by the purchaser),5.1.7 Length
32、(specific or random),5.1.7.1 Grade for Type E and Type S,5.1.8 End finish,5.1.8.1 Plain end, square cut,5.1.8.2 Plain end, beveled,5.1.8.3 Cut groove (Note 4),5.1.8.4 Rolled groove (Note 4),5.1.8.5 Threads only,5.1.8.6 Threaded and coupled, and5.1.8.7 Couplings power tight.NOTE 4Type of groove speci
33、fied by the purchaser.5.1.9 ASTM designation.6. Materials and Manufacture6.1 The steel for both welded and seamless pipe shall be made by one or more of the following processes: open-hearth,electric-furnace, or basic-oxygen.6.2 Welded pipe NPS 4 DN 100 and under may be furnace-welded or electric-res
34、istance welded. Welded pipe over NPS 4 DN100 shall be electric-resistance-welded.6.3 The weld seam of electric-resistance-welded pipe in Grade B shall be heat treated after welding to a minimum of 1000 F540 C so that no untempered martensite remains, or otherwise processed in such a manner that no u
35、ntempered martensiteremains.7. Chemical Composition7.1 The steel shall conform to the requirements as to chemical composition specified in Table 3.7.2 An analysis of two pipes from each lot of 500 lengths, or fraction thereof, may be made by the purchaser. The chemicalcomposition thus determined sha
36、ll conform to the requirements specified in Table 3.TABLE 3 Chemical RequirementsComposition, max, %C Mn P SType E (electric-resistance-welded pipe) otherwise thelength shall be rejected. For pipe produced in multiple lengths, retests may be cut from each end of each individual length in themultiple
37、. Such tests shall be made with the weld alternately 0 and 90 from the line of direction of force. Each length that exhibitsfailure shall be rejected.18. Inspection18.1 The inspector representing the purchaser shall have free entry at all times while work is being performed, to all parts ofthe manuf
38、acturers works that concern the manufacture of the material ordered. The manufacturer shall afford the inspector allreasonable facilities to satisfy him that the material is being furnished in accordance with this specification. All tests (exceptproduct analysis) and inspection shall be made at the
39、place of manufacture prior to shipment, unless otherwise specified, and shallbe so conducted as not to interfere unnecessarily with the operation of the works.18.2 For Government Procurement Only Except as otherwise specified in the contract, the contractor is responsible for theperformance of all i
40、nspection and test requirements specified herein and may use his own or any other suitable facilities for theperformance of the inspection and test requirements specified herein, unless disapproved by the purchaser at the time of purchase.The purchaser shall have the right to perform any of the insp
41、ections and tests at the same frequency as set forth in this specification,where such inspections are deemed necessary to assure that material conforms to prescribed requirements.A795/A795M 13619. Rejection19.1 Each length of pipe received from the manufacturer may be inspected by the purchaser and,
42、 if it does not meet therequirements of this specification based on the inspection and test methods as outlined herein, the length may be rejected and themanufacturer shall be notified. Disposition of rejected pipe shall be a matter of agreement between the manufacturer and thepurchaser.19.2 Pipe fo
43、und in fabrication or in installation to be unsuitable for the intended use, under the scope and requirements of thisspecification, may be set aside and the manufacturer notified. Such pipe shall be the subject of a mutual investigation as to thenature and severity of the deficiency and the forming
44、or installation, or both conditions involved. Disposition shall be a matter ofagreement.20. Certification20.1 The producer or supplier shall, upon request, furnish to the purchaser a certificate of inspection stating that the materialhas been manufactured, sampled, tested, and inspected in accordanc
45、e with this specification, and has been found to meet therequirements.21. Product Marking21.1 Each length of pipe shall be legibly marked by rolling, stamping, or stenciling to show the name or brand of themanufacturer, the kind of pipe, that is, continuous-welded, electric-resistance-welded A, elec
46、tric-resistance-welded B, seamless A,or seamless B. Grade A or B for Type E or S pipe, the ASTM designation, the length, and the letters “NH” if not hydrostaticallytested. Bundled pipe NPS 112 DN 40 and smaller may have this information marked on a tag, securely attached to each bundle.21.2 When pip
47、e sections are cut into shorter lengths by a subsequent processor for resale as material, the processor shall transfercomplete identifying information to each unmarked cut length, or to metal tags securely attached to bundles of unmarked smalldiameter pipe. The same material designation shall be inc
48、luded with the information transferred and the processors name,trademark, or brand shall be added.21.3 Bar CodingIn addition to the requirements in 21.1 and 21.2, bar coding is acceptable as a supplemental identificationmethod. The purchaser may specify in the order a specific bar coding system to be used.22. Packaging, Package Marking, and Loading22.1 When specified in the purchase order, packaging, marking, and loading of shipment shall be in accordance with thoseprocedures of Practices A700.22.2 For Government ProcurementWhen speci
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