Pressure test methods

ISO 1167, Thermoplastics pipes for the conveyance of fluids - Resistance to internal pressure - Test method, 1996. 

ISO 1872-1 1993 Plastics - Polyethylene (PE) moulding and extrusion materials - Part 1 Designation system and basis for specifications ISO 1872-2 1997 Plastics - Polyethylene (PE) moulding and extrusion materials - Part 2 Preparation of test specimens and determination of properties ISO 1969 2004 Fibre ropes - Polyethylene - 3- and 4-strand ropes ISO 3458 1976 Assembled joints between fittings and polyethylene (PE) pressure pipes -Test of leakproofness under internal pressure ISO 3459 1976 Polyethylene (PE) pressure pipes - Joints assembled with mechanical fittings - Internal under-pressure test method and requirement ISO 3501 1976 Assembled joints between fittings and polyethylene (PE) pressure pipes -Test of resistance to pull out... 

ISO 8361-2 1991 Thermoplastics pipes and fittings - Water absorption - Part 2 Test conditions for unplasticized poly(vinyl chloride) (PVC-U) pipes and fittings ISO 9393-2 1997 Thermoplastics valves - Pressure test methods and requirements - Part 2 Test conditions and basic requirements for PE, PP, PVC-U and PVDF valves ISO 9852 1995 Unplasticized poly(vinyl chloride) (PVC-U) pipes - Dichloromethane resistance at specified temperature (DCMT) - Test method ISO 9853 1991 Injection-moulded unplasticized poly(vinyl chloride) (PVC-U) fittings for pressure pipe systems - Crushing test... 

ISO 11468 1997 Plastics - Preparation of PVC pastes for test purposes - Dissolver method ISO 12092 2000 Fittings, valves and other piping system components made of unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly(vinyl chloride) (PVC-C), acrylonitrile-butadiene-styrene (ABS) and acrylonitrile-styrene-acrylester (ASA) for pipes underpressure - Resistance to internal pressure - Test method... 

The comparison of the improved time/pressure test method with the test by HSE 0 2 8 4 reveals that the inner volume of the pressure vessel is larger by as much as 27cm 3 (20cm J for HSE) it has a branch nozzle for temperature measurement on the... 

It is quite important to assess how strong the deflagration rate is at the time of ignition for high energy materials like explosives, but a simple, suitable way to assess this quantitatively is not known. For this purpose the improved time/pressure test method can be applied. This test method, however, has been developed to determine the... 

K7.8 Analysis of deflagration by a visible time/pressure test 1001 To investigate further the validity of the improved time/pressure test method, a new device was introduced to make the inside of the chamber visible to enable direct observation of the tests. Deflagration phenomenon have been analyzed by the determination of deflagration rates as well as by the results of visible observation. 

Factors affected by the rate of pressure increase in a given space and for a given amount of energy include the pressure reached at equilibrium per unit amount of substance, and the reaction rate (or deflagration rate). The improved time/pressure test method is considered to be the test method that satisfies both constraints. In the case of having a clear flame front like KCIO 3 /cellulose mixtures, the deflagration rate can be obtained by the method discussed above. 

The Reid vapor pressure test method (ASTM D-323, IP 69) measures the vapor pressure of volatile petroleum. The Reid vapor pressure differs from the true vapor pressure of the sample because of some small sample vaporization and the presence of water vapor and air in the confined space. 

ISO 3459 1976 Polyethylene (PE) pressure pipes - Joints assembled with mechanical fittings - Internal under-pressure test method and requirement. 

Inspection of joints by ultrasonic testing ASTM F 600. Tightness under internal pressure test method ISO 3458. 

This test method covers the determination by means of a glass hydrometer of the API gravity of crude petroleum and petroleum products normally handled as liquids and having a Reid vapor pressure (Test Method D 323) of 26 psi (180 kPa) or less. Gravities are determined at 60 F (15.56 C), or converted to values at 60 F, by means of standard tables. These tables are not applicable to nonhydrocarbons or essentially pure hydrocarbons such as the aromatics. 

Reid vapor pressure (Test Method D 323), max 110 kPa (17 psi) Bromine number (Test Method D 1159), 0.5 maximum Isopentane, maximum, 10 % n-pentane, minimum, 80%. 

Note 6—The target calibration values used in this section are specific to the automatic vapor pressure instrument evaluated in the 1988 interlaboratory cooperative program. These calibration values do not necessarily correspond to the total vapor pressures or the dry vapor pressures (Test Method D 49S3) reported for the reference calibration materials, but rather are values that the instrument manufacturer suggests using to produce a dry vapor pressure equivalent reading on the digital display. 

Oberfell,. Alden, and Hepp, Comparison of Vapor-pressure Testing Methods, 8th Ann. Meeting API, 1928. 

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