MIL-STD-1330D(SH)
20 September 1996
TABLE V. Hydrostatic testing.
Attribute |
Requirement |
Applicability |
New or major repaired pipe and components, including replacement of pressure containing piece parts, shall be hydrostatically (strength and porosity) tested. Major repairs include any work/rework where the pressure containing boundary is affected by welding, brazing, machining, or a fabrication process which could affect the structural adequacy of the pipe or component. The following items are exempt from hydrostatic testing: isolatable pressure measuring devices such as pressure gauges, transducers, and pressure switches, valve packing, pump packing, pump mechanical shaft seals, mechanical joint bolting, valve stems, and storage tanks in support of oxygen-nitrogen plants. |
|
When accomplished |
Hydrostatic testing is normally accomplished before component cleaning or final system flushing. It shall be accomplished prior to tightness or operational testing. Hydrostatic testing on an oxygen clean component or system is allowed provided the following are met or accomplished: Water: The test equipment shall satisfy 1.2.4, the water shall be as specified in 4.6.2, and the component or system shall be dried as specified respectively in 5.2.6 and 5.5.10. Solvent: Testing for cleanliness and solvent removal shall be as specified in 5.8.3.4(b) and 5.8.3.4(c). If the samples indicate that the system has been contaminated, the contaminated portion of the system shall be reflushed as specified in 5.8. |
Test fluid |
The test fluid is as specified in 4.6. |
|
Test pressure |
The test pressure is 150 percent of system maximum operating pressure, but not less than 50 lb/in2. |
Test duration |
Shop testing of components shall be for not less than 1 minute plus sufficient time for inspection. Testing conducted on piping or installed components shall be for not less that 15 minutes plus sufficient time for inspection. |
Acceptance criteria |
No leakage or permanent deformation. |
Special notes |
1. Hydrostatic testing with a gas (helium or nitrogen) is allowed with local engineering approval. Hydrostatic testing with a gas is extremely dangerous. Appropriate safety precautions are the responsibility of the performing activity. 2. Hydrostatic testing of Department of Transportation (DOT) certified steel flasks shall be in accordance with CGA C-1. Hydrostatic testing of DOT certified aluminum flasks shall be in accordance with CGA C-1 and CGA C-6.1. Hydrostatic testing of DOT certified fiber reinforced aluminum flasks shall be in accordance with CGA C-1 and CGA C-6.2, except prior to measuring permanent expansion, the flask shall rest for not less than 60 seconds. Hydrostatic testing of MIL-F-22606 flasks shall be in accordance with NAVSEA 0902-018-2010 and NAVSEA S9086-SY-STM-010/CH-551. Flasks tested with water shall be dried as specified in 5.3.4. 3. Hydrostatic test requirements may be replaced with added inspections in accordance with NAVSEA S9086-RK-STM-010/CH-505 for welded or brazed joints associated with piping system modifications or repairs with local engineering approval. Welded joints shall be cleaned as specified in this standard, or cleanliness shall be maintained as specified in 5.11. Brazed joints shall be cleaned as specified in 4.8. |
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