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1、International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONOMEYHAWCHAR OPTAHHJAUHR fl0 CTAH shall conform dimensionally with the requirements of this specification ; shall withstand the proof pressure specified in table 2 without imperfection or leakage occurring when tested as specified i
2、n 4.4.2; and shall be capable of Performance requirements specified as follows : 3.4.1 Examination of product In accordance with 4.4.1. 3.4.2 Proof pressure In accordance with 4.4.2. 3.4.3 Elongation and contraction In accordance with 4.4.3. 3.4.4 Leakage In accordance with 4.4.4. 3.4.5 Room tempera
3、ture burst pressure In accordance with 4.4.5. 3.4.6 High temperature burst pressure In accordance with 4.4.6. 3.4.7 Oil resistance In accordance with 4.4.7. 3.4.6 Fuel resistance In accordance with 4.4.8. 3.4.9 Flexibility and vacuum In accordance with 4.4.9. 3.4.10 Pressure surge In accordance with
4、 4.4.10. 3.4.11 Conductivity ftype 2 only) In accordance with 4.4.11. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 00:41:40 MDTNo reproduction or networking permitted withou
5、t license from IHS -,-,- ISO7313-1984iE) Table 2 - Physical requirements of hose assemblies DN Hose size 06 10 12 16 20 25 32 40 50 63 80 105 Nominal Proof pressure pressure max. min. MPa (bars) MPa (bars) 6.8 68) 13.6 (136) 6.8 (68) 13.6 (136) 6.8 (68) 13.6 (136) 6.1 (61) 12,2 (122) 6,l (61) 12.2 (
6、122) 6.1 (61) 12,2 (122) 6.1 (61) 12,2 (122) 5,l (51) 10,2 (102) 1,7 (17) 3,4 04) 0,6 (6) 1.2 (12) 0,6 (6) 1.2 (12) 0.6 (6) 1.2 (12) Minimum burst pressure at: Bend radius Test samples” room at inside high Quantity temperature temperature of bend of Length MPa (bars) MPa (bars) mm samples mm 27.2 (2
7、72) 19,0 (190) 32 11 460 27.2 (272) 19,0 (190) 57 11 460 27.2 (272) 19.0 (190) 73 11 460 24.4 (244) 17.0 (170) 76 11 460 24.4 (244) 17,0 (170) 95 11 460 24,4 (244) 17,0 (170) 127 11 460 24,4 (244) 17.0 (170) 166 4 460 7 510“ 20,4 (204) 14,2 (142) 190 4 460 7 635“ 6.8 68) 4,7 (47) 255 4 460 7 790“ 2,
8、4 (24) 1,6 (16) 320 4 460 7 965“ 2.4 (24) 1.6 (16) 380 4 460 7 1 145” 2.4 (24) 1,6 (16) 610 4 460 7 1525“ ? * Assembly length required for pressure surge test. 3.5 Length Hose assembly lengths shall be specified in the following in- crements only : 500 mm long and under : not less than 5 mm; 500 to
9、1 000 mm long : not less than 10 mm; 1 000 to 1 500 mm long : not less than 20 mm; over 1 500 mm long : not less than 30 mm. Tolerantes on hose assembly lengths shall be as follows : +3 mm for lengths under 500 mm ; +7 mm for lengths from 500 to WO mm ; f 13 mm for lengths from 900 to 1 300 mm; + 1
10、% for lengths over 1 300 mm. 3.6 Interchangeability All Parts having the same manufacturers part number shall be directly and completely interchangeable with respect to installa- tion and Performance. 3.7 Identification of product Equipment, assemblies and Parts shall be marked for identifica- tion
11、in accordance with appropriate Standards to the extent ap- plicable. The following special marking shall be added : 3.7.1 Fittings The manufacturers name or trademark shall be permanently marked on each end fitting. ? For Type 2 testing, one additional Sample as noted in 4.4.11 is required. 3.7.2 As
12、sembly The assembly shall be identified by a permanent marking on the end fitting or on a permanent band containing the following markings : a) assembly manufacturers name or trademark; b) complete hose assembly part number; c) nominal pressure in megapascals; d) pressure test Symbol “PT”; e) assemb
13、ly specification “ISO 7313”, and “type 1” or “type 2” ; f) date of hose assembly manufacture expressed in terms of month and year. 3.8 Workmanship 3.8.1 General The hose assembly including all Parts shall be constructed and finished in a thoroughly workmanlike manner. All surfaces shall be free from
14、 burrs. All sealing surfaces shall be smooth, except that annular tool marks up to 2.5 pm maximum are acceptable. 3.8.2 Dimensions and tolerantes All pertinent dimensions and tolerantes, where inter- changeability, Operation or Performance of the hose assembly may be affected, shall be specified on
15、all drawings. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 00:41:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO7313-1984iE) 3.6.3 Cleaning
16、All hose assemblies shall be free from Oil, grease, dirt, or any other foreign material, both internally and externally. Unless otherwise specified, hose assemblies shall be cleaned by flushing with suitable degreasing solvent, blow drying with air, and sealing with clean end taps. 4.2.4 Rejection a
17、nd retest 3.6.4 Openings and covers Openings shall be suitably protected against ingress of foreign material ; all threads shall be protected against darnage. All pro- tective covers shall be of a configuration that prohibits assembly with the mating patt without removal of the cover. 4 Quality assu
18、rance provisions When one item selected from a production run fails to meet the specification, no items still on hand or later produced shall be accepted until the extent and Cause of failure are determined and corrective action, as necessary, taken. For operational reasons, the individual tests may
19、 be continued pending the investigation of a sampling or periodic control test failure. Final acceptance of items on hand or produced later shall not be made until it is determined that items meet the re- quirements on which the rejection was based. 4.3 Test conditions 4.3.1 Preparation of specimens
20、 4.3.1.1 General 4.1 Classification of tests The inspection and testing of hose assemblies shall be classified as follows : a) acceptance (sec 4.2) ; b) qualification testing (sec 4.5). 4.2 Acceptance tests Acceptance tests shall consist of : a) individual test; b) sempling test ; c) periodic contro
21、l test. 4.2.1 Individual tests Esch hose assembly delivered under this International Standard shall be subjected to the following tests : a) examination of product (sec 4.4.1) ; b) proof pressure test fsee 4.4.2). 4.2.2 Sampling test The following test shall be performed on hose assemblies picked at
22、 random from each lot. A lot is defined as 500 assem- blies of a given dash size, manufactured by the same process free from any deviations likely to have a significant effect on product quality. 4.2.2.1 One hose assembly shall be consecutively subjected to the following tests : a) elongation and co
23、ntraction test fsee 4.4.3); b) leakage test (sec 4.4.4). 4.2.3 Periodic control test A fuel resistance test fsee 4.4.8) shall be performed on at least two assemblies for each periodic control test selected from each 5 000 hose assemblies for each dash size, not necessarily manufactured during one co
24、ntinuous production run. Length of the Sample hose assemblies shall be in accordance with table 2 unless otherwise specified. 4.3.2 Test fluids Unless otherwise specified, the test fluid shall be a Petroleum base hydraulic fluid or water. When a high temperature test is performed, the test fluid sha
25、ll be a synthetic base lubricating oil unless otherwise specified by the procuring authority. 4.3.3 Temperature measurements Unless otherwise specified, temperature measurements shall be taken within 150 mm of the hose assemblies under test. All temperatures, unless otherwise specified, shall have a
26、 tolerante of :i OC. 4.3.4 Test pressure All test pressures, unless otherwise specified, shall have a tolerante within f2 % . 4.4 Performance tests See table 4 for test schedule. 4.4.1 Examination of product All hose assemblies shall be examined to determine confor- mance to this specification with
27、respect to material, size, workmanship and identification. Broken or missing reinforcing wires or any other evidente of malfunction shall be Cause for rejection. Crossed over reinforcing wires shall not be Cause for rejection. 4.4.2 Proof pressure test All hose assemblies shall be pressure-tested to
28、 the values specified in table 2 for a period of not less than 30 s and not more than 5 min. All complete hose assemblies used for the tests described in this International Standard shall have this proof pressure test applied to them. Any evidente of leakage from hose or fittings or any other eviden
29、te of malfunction shall constitute failure. 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 00:41:40 MDTNo reproduction or networking permitted without license from IHS -,-,- I
30、SO 7313-1984 (EI 4.4.3 Elongation and contraction test The test assembly shall be held in a straight unpressurized con- dition and a 250 mm Standard length marked off on the hose. lt shall then be pressurized to operating pressure for 5 min minimum. At the end of this 5 min period, and while still p
31、ressurized, the Standard length shall be measured and recorded. The Standard length of hose shall not Change in length more than T? % , 4.4.4 Leakage test Two hose assemblies of each size shall be subjected to this test. The assemblies shall be pressurized while at room temperature to 0,17 MPa for a
32、 minimum of 5 min. The pressure shall be increased to a value equal to 70 % of the minimum room temperature burst pressure specified in table 2 and again held for a minimum of 5 min. The pressure shall be completely released and again increased to 70 % of the minimum room temperature burst pressure
33、and held for a minimum of 5 min. Any evidente of leakage shall constitute failure. 4.4.5 Room temperature burst pressure test Room temperature shall be defined as 20 f 15 OC. During this test the assemblies shall be fastened at one end to the Source of pressure. They shall be straightened and the fr
34、ee end shall not be restrained or fastened in any way. The rate of pressure rise shall be 170 b) the test schedule used shall be as specified in table 4. 5 Ordering data Procurement documents shall specify the following : a) size, length and type of hose assemblies to be fur- nished ; b) type, size,
35、 material, or special features of end fittings desired ; c) levels of packaging and packing desired. 6 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 00:41:40 MDTNo reproduction
36、 or networking permitted without license from IHS -,-,- ISO7313-1984tE) Table 4 - Qualification test schedule Tests Sample No. 1 2 3 4 5 6 7 8 9 10 11 12” 4.4.1 Examination of product xxxxxxxxxxxx 4.4.2 Proof pressure xxxxxxxxxxx 4.4.3 Elongation and contraction X 4.4.4 Leakage x x 4.4.7 Oil resista
37、nce x x 4.4.8 Fuel resistance x x 4.4.5 Room temperature burst pressure x x 4.4.6 High temperature burst pressure x x 4.4.9 Flexibility and vacuum x x x 4.4.12 Salt corrosion x x 4.4.10 Pressure surge x x x x 4.4.11 Conductivity X ? For type 2 assemblies only. 213 to 314 cycle 4 m One cycle ; 2 to 3
38、 s cm One cycle ; 2 to 3 s c The curve shown above is the approximate pressureltime cycle for proper severity for surge testing hose assemblies. lt is mandatory that the pressure peak rises to 100 % of nominal pressure. lt is considered desirable that the pressure time curve be confined to the shade
39、d area so that results of tests performed on different test machines will be more nearly comparable. Figure 1 - Pressure surge curve 7 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/
40、2007 00:41:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7313-1984 (El Dimensions in millimetres 1 WO V d.c. 7 Conductor threaded into plug Flare reinforcement Vent Upper electrode (salt water solution Non-metallic plug O-ring seal Inner tube L Hose reinforcement 1
41、 - _ - kFittingsocket ymy Fitting nipple _ Mating adapter rrg (Insulate electroda from ground) Fitting nut Figure 2 - Conductivity test diagram 1) or mercury) 1) If used, seit water solution shell be 450 g NaCI for 1 I H20. 8 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 00:41:40 MDTNo reproduction or networking permitted without license from IHS -,-,-