ISO-9974-3-1996.pdf
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1、INTERNATIONAL STANDARD IS0 9974-3 First edition 1996-04-l 5 Connections for general use and fluid power - Ports and stud ends with IS0 261 threads with elastomeric or metal-to-metal sealing - Part 3: Stud ends with metal-to-metal sealing (type B) Raccordements pour applications g 1 MPa = 1 N/mm* 2)
2、To be published. (Revision of IS0 261:1973) 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 09:56:08 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 99763
3、:1996(E) 0 IS0 3 Definitions For the purposes of this part of IS0 9974, the defi- nitions given in IS0 5598 apply. 4 Dimensions Stud ends shall conform to the dimensions shown in figure 1 and given in table 1. Hex tolerances across flats shall be in accordance with IS0 4759-1, product grade C. 5 Req
4、uirements 5.1 Working pressure Stud ends made of low carbon steel shall be designed for use at the working pressures given in table 2. 5.2 Performance Stud ends made of low carbon steel shall meet at least the burst and impulse pressures given in table 2, when tested in accordance with clause 7. 6 M
5、etal-to-metal sealing The machined seal edge is compressed during as- sembly. This causes damage to the sealing face of the port. Safe re-assembly is not possible. A high surface pressure shall also be obtained, otherwise leakage is possible. 7 Test methods Parts used for the cyclic endurance or bur
6、st test shall not be tested further, used or returned to stock. 7.1 Burst pressure test 7.1.1 Principle Test three samples to confirm that stud ends in ac- cordance with this part of IS0 9974 meet or exceed a ratio of 4:l between the relevant burst and working pressures. 7.1.2 Materials Test blocks
7、shall be unplated and hardened to 45 HRC to 50 HRC (see IS0 6508). Stud ends shall be made from low carbon steel and plated. 7.1.3 Procedure 7.1.3.1 Thread lubrication For testing only, threads and contact surfaces shall be lubricated with hydraulic oil with a viscosity of VG 32 in accordance with I
8、S0 3448 prior to the application of torque. 7.1.3.2 Stud end torque Test stud ends after application of the torques given in table 3. 7.1.3.3 Pressure rise rate During the burst test, the rate of pressure rise shall not exceed 138 MPa/min (I 380 bar/min). 7.1.4 Test report Test results and condition
9、s shall be reported on the test data form given in annex A. 7.2 Cyclic endurance (impulse) test 7.2.1 Principle Test six samples at their respective impulse press- ures. 7.2.2 Materials Use the same materials as those given in 7.1.2. 7.2.3 Procedures 7.2.3.1 Thread lubrication Apply lubricant as spe
10、cified in 7.1.3.1. 7.2.3.2 Stud end torques Apply torque as specified in 7.1.3.2. 7.2.3.3 Cycle and pressure rise rate The cycle rate shall be uniform between 0,5 Hz and 1,3 Hz and shall conform to the wave pattern shown in IS0 6803, except that the pressure rise rate shall be adjusted accordingly.
11、2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 09:56:08 MDTNo reproduction or networking permitted without license from IHS -,-,- Q IS0 IS0 9974-3:1996(E) Surface roughness in microme
12、tres s (width across flats) Figure 1 - Stud end with metal-to-metal sealing (type B) Table 1 - Dimensions of stud ends with metal-to-metal sealing (type B) Dimensions in millimetres Thread 4 4 ho 4, 4 L5 Ls r S W (dl x f) LL series L series S series nom.1) tol.2) nom.1) tol.2) nom.1) to1.2) $2 -:,5
13、-:.2 f 0.2 min. + 0.3 0 M8xl 3 +0.14 0 - - - - 12 11 6.4 8 12 I,5 2 1 MlOxl 4.5 +0.18 0 4 +0.18 _ _ 0 14 13 8,4 8 14 M12x1.5 +0,18 +0,18 - - 6 0 4 0 17 16 9.7 12 17 M14x1.5 - - 7 +0,22 + 0,18 0 5 0 19 18 II,7 12 2 19 M16x1,5 g +022 - - 0 7 +0.22 0 21 20 13,7 12 22 001 3 1.2 M18x1.5 11 +027 o 8 +0,22
14、 - - o 23 22 15,7 12 2,5 24 M20x1,53) +022 - - - - 10 o 25 24 17,7 14 27 M22x1.5 14 +027 - - o8 12 +0.27 0 27 26 19.7 14 27 M26xl,5 +0,27 - - 18 o - - M27x2 16 +027 - - - - o M33 x 2 23 +033 - - o8 20 + 0.33 0 M42 x 2 +033 +033 - - 30 o 25 o M48x2 + 0.39 - - 36 + 0.39 o 32 0 1) Maximum nominal diame
15、ter. 2) Tolerance corresponding to HI3 in accordance with IS0 286-2. 3) For measurement applications. 31 30 23,7 16 32 32 30,5 24 16 32 3 02 39 37 30 18 4 1.6 41 49 47 39 20 50 55 53 45 22 55 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=D
16、efense Supply Ctr/9960866100 Not for Resale, 04/24/2007 09:56:08 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9974-3:1996(E) IS0 Table 2 - Pressures for stud ends with metal-to-metal sealing (type B) Working pressure Test pressure Series Thread Burst Impulse 1) MPa (
17、bar) MPa (bar) MPa (bar) LL M8xl 10 (100) 40 (400) 13.3 (133) MlOxl 10 (100) 40 (400) 13.3 (I 33) MlOxf 25 (250) 100 (1 000) 33,2 (332) Ml2 x 1.5 25 (250) 100 (1 000) 33.2 (332) Ml4 x 1.5 25 (250) 100 (1 000) 33,2 (332) Ml6x1.5 25 (250) 100 (I 000) 33.2 (332) M18x1,5 25 (250) 100 (1 000) 33.2 (332)
18、L M22 x I,5 16 (160) 64 (640) 21,3 (213) M26 x I,5 16 (I 60) 64 (640) 21,3 (213) MJ3x2 10 (100) 40 (400) 13.3 (133) M42x2 10 (100) 40 (400) 13.3 (133) M b) reference to this part of IS0 9974, i.e. 9974-3; c) thread size (d, x P); d) stud end series heavy duty (S), light duty (L extra-light duty (LLI
19、I. EXAMPLE .I or Stud end IS0 9974-3 - Ml0 x I,5 S 9 Identification statement (Reference to this part of IS0 9974) Use the following statement in test reports, cata- logues and sales literature when electing to comply with this part of IS0 9974: “Stud ends with metal-to-metal sealing conform to IS0
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