1、W-C-571C 57 7777774 0000150 2 U i fl j47- 07 w-c-571c January 15, 1981 SUPERSEDING Fed. Spec. W-C-571b November 23, 1960 FEDERAL SPECIFICATION CONDUIT AND FITTINGS, NONMETAL, RIGID; (ASBESTOS-CEMENT OR FIRE CLAY CEMENT), (FOR ELECTRICAL PURPOSES) This specification was approved by the Commissioner,
2、Federal Supply Service, General Services Administra-tion, for the use of all Federal agencies. 1. .SCOPE AND CLASSIFICATION 1.1. Scope. This specification covers conduit, aSbeStOS-CeMent or fire clay cement, and fittings of equivalent material for use in the installation of electrical wires and cabl
3、es, underground burial. 1.2 Classification. types and sizes -see 6.2). The conduit and fittings shall be of the following Type I - Intended for use encased in concrete after installation. Sizes - 3, 3+2, 4, 5, and 6 inches; Type II - Intended for Instailation directly in earth without concrete encas
4、ement. Sizes - 3, 4, 5, and 6 inches. 1.2.1 Definitive part number. Items furnished in accordance with this specification shall be identified by a definitive part number (DPN). This number is inthded for cataloging and ordering purposes; it is not intended for surface printing on items in accordance
5、 with this specification. The DPN shall consist of the Federal Specification symbol plus the specification part number (SPN) (see 1.2D2). The DPN shall be written as indicated below (see 6.5): 5 - DPN W-C-571C xx Fed. Spec. symbol “1 I o SPN (see 1.202) I 1.202 Specification part number. The SPN sha
6、ll be a two position numeric code which identifies items ip accordance with this specification (see table I). FSC 5975 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-W-C-571C 57 M 777777li 0000151 Y M, Sizes in inches for conduit SPN SPN SPN Ends SF
7、N 1-45. 30. 22-1/P 11-1/4* 3 inoh o1 11 21 31 41 51 61 71 I 81 4 inch 05 15 25 35 45 55 65 75 I 85 5 inch 07 17 27 37 47. 57 67 77 I 87 6 inch . o9 i9 29 39 49 591 69 79 I 89 Size in inches for conduit SPN SPN SPN Ends SPN 45“ 30. 22-l/2 11-1/4O 3 inch 02 , 12 22 32 42. 52 62 72 I 82 4 inch 04 14 24
8、 34 44 54 64 74 I 84 5 inch 06 16 26 36 46 56 66 76 I 86 ,6 inch . 08 . 18 28 -38 48 58 68 78 I 88 Type I conduit and fittings SPNs Type I Conduit Reducer Increaser Bell Adapter, * Bends SPN 3-1/2 inch O3 13 23 33 43 53 63 73 I 83 Type II condiiit and fittiws SPNs Bends SPN Type II Conduit Reducer I
9、ncreaser Bell Adapter W-C -571 C TABLE I. Specification part number identification. . 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issues in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. (Activities out
10、side the Federal Government may obtain copies of Federal specifications, standards, and comercial item descriptions as out1 ined under General Information in the Index of Federal specifications , standards and commercial item descriptions. The Index, which includes cumulative bimonthly supplements a
11、s issued, is for sale on a subscription basis by tht. Superintendent of Documents, U.S. Government Printing Office, Nash- ington, DC 20402. (Single copies of this specification, other specifications, and commercial item descriptions required by activities outside the Federal Government for bidding p
12、urposes are available without charge from General Services Administration Business Service Centers in Boston; New York; Philadelphia; Washington, DC; Atlanta; Chicago; Kansas City, MO; Fort Worth; Houston; Denver; San Francisco; Los Angeles; and Seattle., WA. (Federal Government activities may obtai
13、n copies of Federal specifications, standards, and commercial item descriptions, and the Index of Federal Specifications, Standards and Comercial Item Descriptions from established di s tri bu ti on poi n t s i n t hei r agenci es. ) Military Standards: MIL-STD-105 - Sampling Procedures and Tables f
14、or Inspection by MIL-STD-129 - Marking for Shipment and Storage. Attributes. (Copies of Mi 1 itary specifications and standards required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2 I Pro
15、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-W-C -5 71 C / 2.2 Other publications. The following document.foms a part of this specification to the extent specified herein. Unless. a specific issue is identified, the issue in effect on date of invitat
16、ion for bids or, request for proposal shall apply. Underwriterss Laboratories, Inc., (UL): UL 651 - Standard for Rigid Nonmetallic Conduit. (Application for copies should be addressed to the Underwriters Labora- tories, Inc., 333 Pfingsten Road, Northbrook, IL 60062.) 3. REQUIREMENTS 3.1 Description
17、. The conduit shall be a uniform cylindrical tube composed of an intimate mixture of cement, silica and asbestos, or of finely ground soapstone, clay, and cement well mixed and thoroughly cured and ranging in length from 5 to 13 feet. 3.2 First article. When specified (see 6.2.11, the contractor sha
18、ll furnish a complete conduit or conduit fitting of the type and size required for first article inspection and approval (see 4.2.1 and .6.4). 3.3 Codes and standards compliance. Electrical conduits and fittings (asbestos-cement or fire clay cement) shall meet the applicable requirements of UL 651.
19、3.3.1 UL certification. Prior to approval of the first article if one is submitted, or prior to approval of the first shipment, the contractor shall submit to the contracting officer or his authorized representative, satis- factory evidence that the type I and II conduit fittings he proposes to furn
20、ish under this specification complies with requirements of UL 651 as applicable. be the UL label or UL listing mark, or a certified test report from a recognized independent testing laboratory acceptable to-the contracting officer, stating that the type I and II conduit and fittings have been tested
21、 , Acceptable evidence of meeting the requirements of UL 651 shall and conform ta UL 651 as applicable (see 6.3). 3.4 Standard commercial product. The conduit and fittihgs shall, :as a minimum, be in accordance with the requirements of-this specification and , shall be the manufacturers standard com
22、mercial product. Additional or better features which are not specifically prohibited by this specification but which are a part of the manufacturers standard commercial product, shall be included in the conduit and fittings being furnished. A standard commercial product is a product which has been s
23、old or is being currently offered for sale on the commercial market through advertisements or manufacturers catalogs, or brochures, and represents the latest production model. 3.5 Interchangeability of items. All conduits and fittings of the same classification, furnished under a specific contract,
24、shall be identical to the extent necessary to insure interchangeability of component parts, assemblies, accessories, and spare parts. No deviations shall be acceptable without prior written approval of the contracting officer. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
25、thout license from IHS-,-,-W-C-571C 57 7777774 0000153 B I w-c-571c 3.6 MaWirL8. Mterials used shall be fie fiom defaOt8 whioh would rdVOr8ely affeot the perfomanor or waintainabillty of Individual oomponents or of the overall aseeibly*, Materials not speolfied herein shall be of the same quality us
26、ed for the intended purpose in oommeroial praotloe. Unless otherwise speoified herein, all equipment, materlal, and artloles inoorporatsd in the work oovered by this speoifioatlon are to be new-and fabrioated using materials produood *om reoovered raaterlals to the maximm extent possible without Jeo
27、pardizing the intended use . The term “reoovered materials“ means aiateria18 whioh have been oolleoted or rooovered and it shall not corrode oable sheaths (see 4.6.1). 3.9 Joints., The ends of eaoh length of oonduit shall be either straight 3.10 Chemioal resistanoe. The finished oonduit shall not be
28、 damaged when 3.11 Alkalinity. .The oonduit shall be tested to determine the alkalinity (see 4.6.2). 3.12 Absorption. The water absorption of the oonduit at 48 hours shall be not more than 30 percent, when subjected to the. test specified (see 4.6.3) . 3.13 Composition, .dimensions, and thickness. C
29、omposition, dimensions, and thickness of wall for types I and II conduit shall be as follows: I . s.4 _ , I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- . u-c-571 59 m qvq97L1 000035q T w-c -5 71 c 3.13.1 Composition. The conduit shall be compos
30、ed of an intimate mixture of portland cement, silica, and asbestos fiber, or of finely ground soapstone, - I clay, and cement well mixed and thoroughly cured. completely free fkom organic and metallic substances. 6, 6-1/2, 10, or 13 feet as specified (see 6.2). The material shall be 3.13.2 Length. T
31、he nominal overall length of the conduit shall be 4, 5, Nominal inside diheter 3 3-1/2 * 4 5 . 16 3.13.3 Tolerance in length. A tolerance of 2 1 inch is permissible in the pipe. length specified. 9 Type I Type II Mi-nimum wall thickness Minimum wall thickness (ichr (inch) . 22 032 .22 - .22 032 25 .
32、35 25 35 -. 3.13.4 Thickness of wall. The minimum wall thickness of the barrel of the conduit shall be not less than indicated in table II; Nominal inside diamet er - (inches ) 3 3-1/2 4 5 6 Free span of flexural test Minimum test application Rate of load specimen load pounds/minute Type.?- pe II Ty
33、pe 1 Type II Type I Type II (pounds) (pounds) 30 30 ri50 . 850 400 750 30 30 500 1100 500 750 42 42 700 900 500 1000 48 48 900 1500 500 1000 54 54 . * 1300 , 2000 750 1000 - rinches 1 *es 1- 3.15 Crushing strength. such as to withstand the loads set forth in table IV when the conduit is subj.ected t
34、o the test specified (see 4.6.5). The crushing strength of the conduit shall be Nominal inside diamet er (inches 1 3 3-1/2 4 5 6 - Rate of load application Minimum crushing loads pounds /minute Type I Type II Type I Type rI 50 O 1200 500 500 500 _ 500 - 500 1200 500 500 500 900 500 500 500 800 500 5
35、00 -(pounds j pounds) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-w-c-57lC 3.16 Identification markinq. Identification shall be permanently and legibly marked directly on the conduit or fittings at the source of manu- facture. Identification shal
36、l include the manufacturers name and trademark to be readily identifiable to the manufacturer. In addition, information required by UL 651, as applicable, shall be included on the oonduit or fittings. . 3.17 Workmanship. The conduit bore shall have a smooth surfaoe, and shall be st,raight, true, and
37、 free from obstructions. conduit shall be rounded and smoothed, a,nd all conduit edges shall be cut at right angles to the axis of the conduit. 811 inside edges of the 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the
38、 contractor is responsible for the perform- ance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the contractor may use his own or, any other other facil ities suitable for the performance of the inspection requirements speci fi ed heyei n
39、, un1 esc di sapproved by the Government. The Government re- serves the right to perform any of the inspections set forth in the speci- fication where such inspections are deemed necessary to assure supplies and services conform to prescribed reauirements. 4.1.1 Standards oompliance. Proof of compli
40、ance with the stan&ar.ds cited in 3.3 shall be made available to the contracting officer or his authorized representative. evidence of compliance. C-ertification specified under 3.3.1 will be acbepted as 4.2 Classification of inspection. The inspection requirements specified herein shall be classifi
41、ed as follows: (a) First artioe inspection (see 4.2.1). (b) Quality Conformance inspection (see 4.2.2) . 4.2.1 First,article inspection, First article inspection shall be performed on one type and size of conduit or fitting when a first article sample is required (see 3.2 and 6.2). examination of 4.
42、5 and the tests of 4.6. The first article may be a standard production item from the suppliers current inventory provided the conduit or fitting meets the requirements of this specification and is representative of the design, construction, and manufacturing technique applicable to the remaining typ
43、e and size of conduit or fitting to be furnished under the contract. This inspectfon shall include the 4.2.2 Quality conformance inspection, Quality conformance inspection shall be performed on the conduit or fittings seiected in accordance with 4.4. inspection shall include the examination of 4.5 a
44、nd the tests of 4.6. This 4.3 Inspection lot. All units of the same type and size offered to the Government at one time shall be considered a lot for purpose of inspection. The sample unit shall be one complete conduit or fitting. 6 Provided by IHSNot for ResaleNo reproduction or networking permitte
45、d without license from IHS-,-,-W-C-572C 57 W 7777774 000015h 3 w-c -57ic 4.4 Sampling. A random sample of conduit or fittings shall be selected 4.4.1 Sampling for examination. Examination of the conduit or fittings from each lot in accordance with MIL-STD-105. shall be based on inspection level II a
46、nd an Acceptable Quality Level (AQL) of 2.5 percent defective. 4.4.2 Sampling for.tests. Tests of the conduit or fitting shall be based on inspection level S-3 and an AQL of 4.0 percent defective. 4.5 Examination. Each sample seiacted in-accordance with 4.4.1 shall be examined for compliance with th
47、e requirements in section 3 of this specification. product to comply with specified requirements OF any necessary redesign or modification following failure to meet specified requirements shall receive particular attention for aequacy and suitability. encompass all visual examination and dimensional
48、 measur-ements. Any redesign or modification of the suppliers standard This inspection shall 4.6 Tests. Each sample selected in accordance with 4.4.2 shall be tested Tests shall be conducted as to determine compliance with this specification. specified in 4.6.1 through 4.6.6. at least 18 hours at ro
49、om temperature prior to testing. the flexural and crushing tests shall be substantial and rigid throughout, so that the distribution of the load shall not be affected appreciably by the deformation or yielding of any part of the machine. All test specimens shall be conditioned for The machines used for 4.6.1 Chemical properties test. Six-inch lengths shall be immersed in solutions 0.1 normal of any ground acid, alkali, o
