Tightness test

There are three methods of release detection that are associated with modem tank systems.18,22 The first approach is to conduct an annual tank or line tightness test to detect small releases and to use more frequent monitoring by another method to detect large releases. All tank and line tightness tests must be performed at least once a year and must be able to detect leaks of 0.38 L/h (0.1 gal/h). In all cases where annual tightness tests are used, the regulation requires an additional form of leak detection in which tests on tanks are conducted at least monthly and those on pressurized lines at least hourly this ensures the detection of excessively large releases. For tanks, daily inventory records must be reconciled monthly, for pressurized lines, leaks of up to 11.4 L/h (3 gal/h) must be reliably detected. 

Inventory monitoring may be used if it detects a leak of one percent (1%) of flowthrough plus 130 gal on a monthly basis and is coupled with an annual tightness test. Inventory monitoring must be done. 

Tank tightness testing (twice yearly) and inventory control (measured daily). 

On May 17, 1993, two underground storage tanks (USTs) at the Artesia Yard failed tank-tightness tests. A representative of the New Mexico Environment Department (NMED) confirmed the release on August 2, 1993, when the tanks were removed (Fig. 2). In addition to removing the tanks and associated piping, which were the primary sources of contamination, the excavation contractor removed approximately 100 yards of hydrocarbon-contaminated soil from the former tankhold. 

The first part of the seal qualification tests is performed on a specific tightness test machine called BAGHERA at CEA Grenoble. It allows to study the relationship between the applied load, the seal... 

For primer performance testing, primers are sealed in an air-tight test apparatus and initiated by dropping an 8 or 16 oz steel ball onto the primary explosive. Pressure transducers measure the output (Fig. 1.18c). 

Air-Tightness Test. Some explosives,propellants, pyrotechnic compositions and amnunition used at the present time.deteriorate much quicker if they are stored under atmospheric conditions(especially in the presence of moisture) than if the containers in which diey are stored are airtight. As air-tight containers are currendy in use, it is necessary to test them to determine whether there are any leaks in them. Till s can be done by pumping air into a closed container until a pressure of 3 to... 

Ampoule Tightness Tests. The purpose of these tests is to allow for rejection of ampoules that have closure defects, fractures, or cracks. These tests fall essentially into two categories penetration of dyed solutions (usually with methylene blue) in the ampoules and poststerilization pressure stress. Details of these methods are not presented here because of space constraints. 

Recent advances have led to the development of the Room Temperature Tightness Test known as ROTT.l" This test closely resembles the actual operating cycle of the gasketed joint (i.e., loading and unloading). It generates parameters that are used to calculate the bolt load for a required maximum allowable leak rate. Gasket manufacturers publish ROTT data. 

The column should be mounted e.xactly vertically by means of a plummet. The lateral parts of the apparatus must not be connected to the main, vertical parts before these have been tested for vacuum-tightness. Testing for leaks should, in fact, always be perfonned step by step, as this method is by far the most rapid. Ground joints should... 

It follows from the above regulations that the transportation of fresh and spent mixed uranium-plutonium fuel should be carried out in transport packages of type B, which are supplied with devices for tightness testing, equipped with an effective radiation shield, and designed to ensure the removal of heat from the fuel. 

Fig. 14 Plot illustrating the tightness test for HPLC pumps.

Leak tightness testing of underground storage tanks containing petroleum products... 

Faure YH et al. (1989) Study of a Water Tightness Test for Geomembranes. In Christensen T et al. (eds) Proceedings of the 2nd Irttemational Landfill Symposium. Environmental Sanitary Engineering Center (CISA), Cagliari, Itahen, ppBIII-l-BIII-11... 

Resistance to dynamic puncture Watertightness at spot of puncture No loss of water tightness Test in accordance with DIN 16726, Section 5.12, drop height 2000 nun... 

To a solution of Ni(cod)2 (10 mol%, relative to nitrile), PCys (40 mol%) and nitrile in toluene was added 1,3-diene (4.0 equiv.). The resulting mixture was transferred into a pressure-tight test-tube (volume 8.5 mL). The test-tube was tightly sealed up and thermostated at 130°C for a giving time. After the reaction mixture was cooled to room temperature, all volatiles were removed in vacuo. NMR yields of the crude product were determined by NMR analysis using 1,3,5-trioxane, 1,4-dioxane or... 

The primary lid is made of forged carbon steel (TStE 355) and is bolted with 28 bolts to the cask body. The primary lid is sealed off with a metal and an elastomer gasket. In the primary lid, one penetration is located for performing the necessary leak-tightness tests. This orifice is closed with a small lid (flange) and a metal gasket. 

Fig. 38 Evolution of /m, the J-Integral accounting for the fracture toughness, and of the elongation at break, break> as a function of the long period, LP, (left) and the lateral size of /3-crystals, L300, (tight). Tests have been performed at room temperature on injection molded samples at 1.5 ms to determine /y and at 50mmmin to measure Sbreak-Mechanical and structural responses have been varied by varying the concentration of NU-lOO, the nucleating agent from 0 to 1300 ppm...

Helium which is mostly used as a tracer gas in leak detection has excellent properties for tightness tests of chemical systems. 

EN 1330-8. (1998) Non-Destructive Testing - Terminology-Part 8 Terms Used in Leak Tightness Testing, European Committee for Standardization, Brussels. 

Volumetric capacity and tightness tests are determined in accordance with JIS Z 1703. 

There are two types of pressure test. The first is a tightness test, used after the equipment has been opened but not modified in any way. Typically this type of test is conducted after the item was opened for cleaning, inspection, or routine maintenance. The test ensures that the equipment is leak-free but it does not test the integrity of the vessel or piping itself. Tightness tests are never conducted at a pressure above the equipment or system design pressure or the relief valve set pressure. 

---