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ISO 5145Cylinder Valve Outlets

ISO 5145; Cylinder Valve Outlets for Gases and Gas Mixtures - Selection and Dimensioning

ISO 5145 Scope
This International Standard establishes practical criteria for determining valve outlet connections for gas cylinders. It applies to the selection of gas cylinder valve outlet connections and specifies the dimensions for a number of them. This international standard does not apply to connections used for cryogenic gas withdrawal or gases for breathing equipment which are subject of other international standards. WARNING - The gas cylinder valve outlet connection is not the only safeguard against accidental misuse; gas cylinder labeling and color codes shall be checked before use.

Thread Requirements
Because this host website is only interested in screw threads; the only part of this standard which we are interested in is the screw threads. The ISO 5145 lists three thread sizes which we have identified as: W24x2.0; W27x2.0 and W30x2.0. The tolerances are listed in Table 2 on Page 6 (of the 2014 version). The tolerance match those given in ISO 965-1 for the commonly used 6g/6H fit combination. These three screw thread sizes listed in ISO 5145 are identical to three of the five sizes listed in the now obsolete NF E 29-650 pg 29 Fig 19.

Disclaimer:
Gage Crib Worldwide Inc has provided this content for general information purposes only and it does not constitute advice. Gage Crib Worldwide Inc tries to provide content that is true and accurate as of the date of writing; however, we give no assurance or warranty regarding the accuracy, or applicability of any of the content. Visitors should not act upon Gage Crib Worldwide Inc content or information without first seeking appropriate professional advice or referencing the official industry standards. 

Comments:
Original Posting: 12/11/2012
Last Revision: 6/17/2019
Error corrections in, or comments about, the above data can be sent to: gageguy@gagecrib.com

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