17.100 (Measurement of force, weight and pressure) 标准查询与下载

ASTM E1194-87(1993)e1 蒸汽压力的标准测试方法

1.1 This test method describes procedures for measuring the vapor pressure of pure liquid or solid compounds. Since no single technique is available to measure vapor pressures from 1 X 10-11 to 100 kPa (approximately 10-10 to 760 torr), two procedures are presented. An isoteniscope (standard) procedure for measuring vapor pressures of liquids from 1 X 10-1 to 100 kPa (approximately 1 to 760 torr) is available in Test Method D2879. A gas-saturation procedure for measuring vapor pressures from 1 X 10-11 to 1 kPa (approximately 10-10 to 10 torr) is presented in this test method. Both procedures are subjects of U.S. Environmental Protection Agency Test Guidelines. This method may not be appropriate for all mixtures.1.2 These two methods were selected to provide data at normal environmental temperatures (10 to 60oC). At least three temperature values should be studied to allow definition of a vapor pressure-temperature correlation. Values determined should be based on temperature selections such that a measurement is made at 25oC (as recommended by IUPAC) (1), a value can be interpolated for 25oC, or a value can be reliably extrapolated for 25oC. Extrapolation to 25oC should be avoided if the temperature range tested includes a value at which a phase change occurs. Extrapolation to 25oC over a range larger than 10oC should also be avoided. The test methods were selected because of their extended range, simplicity, and general applicability (2). Examples of results produced by the gas-saturation procedure during an interlaboratory evaluation are given in . These data have been taken from Reference (3).1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Test Method for Vapor Pressure

ASTM F721-81(2008) 标准管道组装件的标准规范

1.1 This specification covers details of gage piping assemblies for pressure gages with optional provisions for additional gages, pressure switches, transmitters, and so forth, for use with steam, steam drains, feed water, condensate, fresh water, salt water, compressed air, fuel oil, and lubricating oil systems. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

Standard Specification for Gage Piping Assemblies

ASTM F721-81(2004) 标准管道组装件

1.1 This specification covers details of gage piping assemblies for pressure gages with optional provisions for additional gages, pressure switches, transmitters, and so forth, for use with steam, steam drains, feed water, condensate, fresh water, salt water, compressed air, fuel oil, and lubricating oil systems. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

Standard Specification for Gage Piping Assemblies

ASTM F721-81(1998) 标准管道组装件的标准规格

1.1 This specification covers details of gage piping assemblies for pressure gages with optional provisions for additional gages, pressure switches, transmitters, etc., for use with steam, steam drains, feed water, condensate, fresh water, salt water, compressed air, fuel oil, and lubricating oil systems. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

Standard Specification for Gage Piping Assemblies