ISO 2701-1977 Drawn wire for general purpose non-alloy steel wire ropes Terms of acceptance《一般用途非合金钢丝绳用拉拨钢丝 验收条件》.pdf

1、I. INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION .MEXYHAPOJWAR OPTAHWAUWR ITO CXAHAAPTI13AUUA.ORGANISATION INTERNATIONALE DE NORMALISATION Drawn wire for general purpose non-alloy steel wire ropes - Terms of acceptance Fils trkfilh pour ciibles dusages courants en acier non a

2、llie - Conditions de rkeption First edition - 1977-12-15 iii UDC 677.721 : 62-426 : 620.11 Ref. No. IS0 2701-1977 (E) E 0) ; 5 Descriptors : wire rope, wire, steel products, unalloyed steels, receiving, acceptance inspection, sampling. ij E: Price based on 2 pages Copyright International Organizatio

3、n for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FOREWORD IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (IS0 member bodies). The work of

4、 developing International Standards is carried out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison

5、 with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. International Standard IS0 2701 was developed by Technical Committee ISO/TC

6、 105, Steel wire ropes, and was circulated to the member bodies in December 1976. It has been approved by the member bodies of the following countries : Australia Germany Austria India Belgium Israel Canada Italy Chile Mexico Czechoslovakia Poland France Romania South Africa, Rep. of Spain Sweden Tu

7、rkey United Kingdom Yugoslavia The member body of the following country expressed disapproval of the document on technical grounds : U.S.A. 0 International Organization for Standardization, 1977 l Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under l

8、icense with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-INTERNATIONAL STANDARD IS0 2701-1977 (E) Drawn wire for general purpose non-alloy steel wire ropes - Terms of acceptance 1 SCOPE AND FIELD OF APPLICATION This International Standard specifies the terms

9、of acceptance for drawn wire intended for the manufacture of general purpose non-alloy steel wire ropes, as specified in IS0 2232. 2 REFERENCE IS0 2232, Drawn wire for general purpose non-alloy steel wire ropes - Specifications. 3 DEFINITIONS For the purpose of this International Standard, the follo

10、wing definitions apply. 3.1 lot : A definite quantity of wire of the same nominal diameter, grade and finish, presented for control and manufactured under conditions which are presumed uniform. 3.2 unit; unit of product : - Coil of single length of wire of which the mass or length is variable or fix

11、ed, or - Bobbin : variable or fixed quantity of single length of wire which is put on a bobbin with flanges, or - Cheese wound coil : variable or fixed quantity of single length of wire, which is wound on a cardboard centre. 3.3 basic sampling unit : A mass (m,), expressed in kilograms, having by co

12、nvention a value equal to 100 d, d being the diameter of the wire, expressed in millimetres. 3.4 size of lot (IV) : A number deduced from the convention mentioned in 3.3.) This number is calculated using the formula N=lOx! d where m is the mass of the lot, in tonnes. 3.5 test piece : A length of wir

13、e sufficient for one test of one characteristic. 3.6 test length : A length of wire sufficient to provide all the test pieces needed for one test of all characteristics. 3.7 sample : All test lengths intended to provide information on the lot. 3.8 size of sample (n) : The number of test lengths. 3.9

14、 defect : Non-conformity of the result of a test with the specification for a characteristic. 3.10 defective length : A test length showing one or more defects. 4 TESTS AND RETESTS Tests are carried out for each characteristic given in IS0 2232. A retest shall be carried out if a defect is due to an

15、 error in the manner in which the test piece was taken or the test carried out. 1) Relation between the size of lot and the basic sampling unit : m=NXm, X lW3=NX 1OOdX 10m3 Hence, N=lO; 1 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo

16、reproduction or networking permitted without license from IHS-,-,-IS0 2701-1977 (E) 5 SAMPLING AND CRITERIA OF CONFORMITY The evidence of the wire manufacturers test in accordance with an agreed method may be accepted by the rope maker. Where the rope maker wishes to have acceptance tests carried ou

17、t, the size of sample and the acceptance criteria shall be as given in the table. To ensure representative sampling, the test lengths shall be taken at random. If the number of defectives is greater than is shown in the third column of the table, then all the units (units of product) shall be tested

18、 (100 %), but only for the defective characteristic(s). In the case where one (or more) of these new tests is (or are) not satisfactory, the unit(s) represented by this test length does (do) not conform. of lot (N) Size Number of defectives for of sample conformity non- (n)” conformity 6 ACCEPTANCE

19、OR REFUSAL Acceptance or refusal of a lot which does not conform is decided by agreement between the interested parties. 2to 15 8 16to 50 13 51 to 90 20 91 to 150 32 151 to 280 50 281 to 500 80 l If the size of a lot is less than n, a test shall be carried out on each unit. 2 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-