1、UDC 621.882.343 :621.3-213.34 :622 DEUTSCHE NORM March 199 Triangular nuts IDIN I for use with electrical equipment in mining I 22425 Schlagwettergeschtzte und explosionsgeschtzte elektrische Betriebsmittel fr den Bergbau; Dreikantmuttern Supersedes April 1989 edition. In keeping with current practi
2、ce In standards published bythe International Organization for Standardization (ISOJ, a comma has been used throughout as the decimal marker. Dimensions in mm 1 Scope and field of application This standard specifies dimensions and technical delivery conditions for triangular nuts designed for use in
3、 special locks as stipulated in the statutory regulations pertaining to electrical equipment for potentially explosive atmospheres in min- ing *) and to be used in boltlnut assemblies as specified in DIN 22416. 2 Dimensions and designation The nuts shall be countersunk on both sides down to the majo
4、r thread diameter Designation of an MIO triangular nut assigned to property class 5: Triangular nut DIN 22425 - M 10 - 5 *) Bergverordnung ber die Zulassung von schlagwettergeschtzten und explosionsgeschtzten elektrischen Betriebs- mitteln (German Regulation on the approval procedure for electrical
5、equipment for use in potentially explosive atmos- pheres in mining). Continued on pages 2 to 4 DIN 22425 Engl. Price group 5 01.92 Sales No. 0105 ith Verlag GmbH, Berlin, has the exclusive right of sale for German Standards (DIN-Namen). Page 2 DIN 22425 Table 1. DIN 22425 Page 3 Material Steel Stain
6、less steel 3 Technical delivery conditions Non-ferrous metal General requirements Thread DIN 267 Part i Tolerance As specified in 6H DIN 13 Parts 13 and 15. A2-504) Property class Mechanical properties (material) CU4 4) 5) 4 or higher As specified in IS0 4759 Part 1, or DIN 7168 (accuracy grade m) 6
7、). I Surface finish Product grade Limit deviations and geometrical tolerances As specified in Corrosion protection subject to agreement (e.g. electroplating as in DIN 267 Part 9). A IS0 4759 Part 1, or DIN 7168 (accuracy grade m) 9. 4) Subject to agreement, use of other materials of at least the sam
8、e strength is permitted. 5) Light metals and light metal alloys are not permitted. 6) Accuracy grade m shall apply for dimensions for which no tolerances have been specified in IS0 4759 Part 1. 4 Marking Nuts of property classes higher than 5 shall be marked as specified in IS0 898 Part 2, stainless
9、 steel nuts and non-ferrous metal nuts, as specified in DIN 267 Parts 11 and i8 respectively. Page 4 DIN 22425 Standards and other documents referred to DIN 13Part13 DIN 13Part 15 DIN 267 Part 1 DIN 267 Part 9 DIN 267 Part 11 DIN 267 Part 18 DIN 7168 DIN 22416 DIN 22417 IS0 898-2 : 1980 IS0 4759-1 :
10、 1978 IS0 metric screw threads; series of preferred sizes for screws, bolts and nuts from 1 mm to 52 mm diam- eter and limits of sizes IC0 metric screw threads; fundamental deviations and tolerances for screw threads of 1 mm diameter and larger Fasteners: technical delivery conditions; general requi
11、rements Fasteners; technical delivery conditions; electroplated components Fasteners; technical delivery conditions; stainless and acid resistant steel components (with addenda to IC0 3506) Fasteners; technical delivery conditions; non-ferrous metal components General tolerances for linear and angul
12、ar dimensions and geometrical tolerances (not to be used for new designs) Electrical equipment for use in potentially explosive atmospheres in mining; assemblies with triangular nuts; safety requirements Electrical equipment for use in potentially explosive atmospheres in mining; triangular wrenches
13、 Mechanical properties of fasteners; nuts with specified proof load values Tolerances for fasteners; bolts, screws and nuts with thread diameters from 1,6 to 150 mm and product grades A, B and C Bergverordnung ber die Zulassung von schlagwettergeschtzten und explosionsgeschtzten elektrischen Betrieb
14、smitteln ). Other relevant standard DIN 22424 Electrical equipment for use in potentially explosive atmospheres in mining; triangular head bolts Previous editions DIN 22 425: 04.55x, 04.89. Amendments In comparison with the April 1989 edition, data on the surface finish are no longer included in the standard designation. International Patent Classification E 21 F 17/00 F 16 B 37/00 F 16 B 41/00 H 02 B 1/12 H O1 H 9/04 7, Obtainable from: Verlag Glckauf GmbH, Postfach 103945, D-4300 Essen-Kray (sales No. 702).
