Logo

ASTM D3796-09(2024)

Historical Reaffirmation

Standard Practice for Calibration of Type S Pitot Tubes

$91.00

$91.00

$163.80


Sub Total (1 Item(s))

$ 0.00

Estimated Shipping

$ 0.00

Total (Pre-Tax)

$ 0.00


Stay effortlessly up-to-date with the latest standard revisions. When new versions are released, they're automatically charged and delivered to you, ensuring seamless compliance.

...

1.1 This practice covers the determination of Type S pitot tube coefficients in the gas velocity range from 305 m/min to 1524 m/min or 5.08 m/s to 25.4 m/s (1000 ft/min to 5000 ft/min). The method applies both to the calibration of isolated Type S pitot tubes (see 5.1), and pitobe assemblies.

1.2 This practice outlines procedures for obtaining Type S pitot tube coefficients by calibration at a single-velocity setting near the midpoint of the normal working range. Type S pitot coefficients obtained by this method will generally be valid to within ±3 % over the normal working range. If a more precise correlation between Type S pitot tube coefficient and velocity is desired, multivelocity calibration technique (Annex A1) should be used. The calibration coefficients determined for the Type S pitot tube by this practice do not apply in field use when the flow is nonaxial to the face of the tube.

1.3 This practice may be used for the calibration of thermal anemometers for gas velocities in excess of 3 m/s (10 ft/s).

1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.

1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 The Type S pitot tube (Fig. 1) is often used to measure the velocity of flowing gas streams in industrial smokestacks and ducts. Before a Type S pitot tube is used for this purpose, its coefficients must be determined by calibration against a standard pitot tube (2).

SDO ASTM: ASTM International
Document Number D3796
Publication Date May 1, 2024
Language en - English
Page Count 13
Revision Level 09(2024)
Supercedes
Committee D22.03
Publish Date Document Id Type View
May 1, 2024 D3796-09R24E01 Revision
Oct. 1, 2004 D3796-09 Revision
May 1, 2024 D3796-09R24 Reaffirmation
Sept. 1, 2016 D3796-09R16 Reaffirmation
Oct. 1, 2004 D3796-90R04 Reaffirmation
Nov. 30, 1990 D3796-90R98 Reaffirmation