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ASTM D1066-11

Historical Revision

Standard Practice for Sampling Steam

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1.1 This practice covers the sampling of saturated and superheated steam. It is applicable to steam produced in fossil fired and nuclear boilers or by any other process means that is at a pressure sufficiently above atmospheric to establish the flow of a representative sample. It is also applicable to steam at lower and subatmospheric pressures for which means must be provided to establish representative flow.

1.2 For information on specialized sampling equipment, tests or methods of analysis, reference should be made to the Annual Book of ASTM Standards, Vols 11.01 and 11.02, relating to water.

1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.

1.4 This standard does not purport to address all of the safety concerns, 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.

It is essential to sample steam representatively in order to determine the amount of all impurities (dissolved chemicals, solid particles, chemicals absorbed on solid particles, water droplets) in it (1). An accurate measure of the purity of steam provides information, which may be used to determine whether the purity of the steam is within necessary limits to prevent damage or deterioration (corrosion, solid particle erosion, flow-accelerated corrosion, and deposit buildup) of downstream equipment, such as turbines. Impurities in the steam may be derived from boiler water carryover, inefficient steam separators, natural salt solubility in the steam and other factors. The most commonly specified and analyzed parameters are sodium, silica, iron, copper, and cation conductivity.

SDO ASTM: ASTM International
Document Number D1066
Publication Date June 15, 2011
Language en - English
Page Count 6
Revision Level 11
Supercedes
Committee D19.03
Publish Date Document Id Type View
Aug. 1, 2018 D1066-18E01 Revision
Aug. 1, 2018 D1066-18 Revision
June 15, 2011 D1066-11 Revision
Dec. 15, 2006 D1066-06 Revision
Jan. 1, 2001 D1066-97R01 Reaffirmation