ISO 16170:2016 pdf free download.In situ test methods for high efficiency filter systems in industrial facilities Méthodes d’essai in situ pour les systèmesfiltrants a très haute efficacité dans les installations industrielles.
B.2 Test procedure considerations
All internal upstream surfaces of the filter installation shall be subjected to an even, fully mixed (i.e. uniform) concentration of challenge aerosol. The extent to which this is achieved will determine the accuracy with which any aerosol leakage can be detected or measured. Extracted upstream aerosol samples shall be demonstrably representative of the aerosol particle concentration of the airflow. The extent to which this requirement shall be met depends on
— accuracy required to meet the safety requirement for the plant or facility, and
— inherent error in the measuring instruments, generation rate of the challenge, etc.
Under ideal conditions (good mixing of the test aerosol, relative deviation of 10 % to the mean value), the filter penetration measured by a single test should be within 40 %. Non-ideal geometry likely to be encountered in real situations can result in considerably large errors unless appropriate countermeasures are adopted.
A uniform concentration profile for the challenge aerosol is achieved by allowing an adequate mixing length between the injection point and the sample extraction point before the filter. This extraction point can be as close to the filter as plant design constraints and sample probe geometry allow.
The precise mixing length required depends on the particular system under consideration and especially on the flow regime (laminar or turbulent). Values deduced from an experimental rig (5 000 m3•h4 to 10 000 m3•h1, 600 mm square duct, 17 m,s1 injection velocity) suggest that some 25 duct diameters are required for natural mixing of relative deviation of 10 % to the mean value from a central injection point (past research work suggests that using the previously recommended mixing length of 10 duct diameters might introduce a variation of three between maximum and minimum concentrations.) The duct length for mixing is also seen to be dependent on the velocity of the sample injection. For injection at values close to the duct velocity, which is the case for a leak on a filter or for an injection system which uses the depression in the duct to induce the sample.ISO 16170:2016 pdf free download.
Tags: In situ test methods
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ISO 8600-1-2013 pdf free download.Endoscopes – Medical endoscopes and endotherapy devices – Part 1: General requirements. 6 Marking 6.1 Minimum marking Iach individual endoscope or endotherapy device shall have the lollowing minimum marking: a) model number and/or other mark sufficient to identify the endoscope or endotherapy device and its manufacturer; b) maximum insertion portion width, minimum instrument channel width, working length, field of view and/or direction of view where such identification is necessary for the intended use of the endoscope or endotherapy device. The Insertion portion width and instrument channel width units shall be in millimetres. The insertion portion width and instrument channel width can also be marked in French size as defined in 3.5, shown by either ‘Fr or an encircled number; c) wherever reasonable and practicable. the endoscope or endotherapy device and detachable component(s) shall be identified in terms of lot numbers or serial numbers, etc. 6.2 Marking legibility The marking shall remain legible over the lifetime of the device when the endoscope or endotherapy device is used, cleaned, disinlected, sterilized and stored in accordance with the instruction manual. 6.3 Marking exceptions When marking on the endoscope or endotherapy device or detachable component(s) is impossible to achieve due…
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ISO 15688-2012 pdf free download.Road construction and maintenance equipment – Soil stabilizers 一 Terminology and commercial specifications. This International Standard establishes the terminology, definitions of operation and commercial specifications for soil stabilizers and their components intended for use in road construction and pavement works. It does not apply to soil stabilizers used in agricultural applications. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.. ISO 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation and marking ISO 6746-1, Earth-moving machinery — Definitions of dimensions and codes — Part 1: Base machine ISO 6746-2, Earth-moving machinery — Definitions of dimensions and codes — Part 2: Equipment and attachments ISO 7134. Earth-moving machinery — Graders — Terminology and commercial specifications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 soil stabilizer self-propelled machine, either towed or transported, with the function of pulverizing, breaking-up, aerating, homogenizing, and loosening existing and imported soil or paving materials and mixing them…
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ISO 18436-1-2012 pdf free.Condition monitoring and diagnostics of machines – Requirements for qualification and assessment of personnel一 Part 1: Requirements for assessment bodies and the assessment process. 5 Requirements for assessment body personnel 5.1 General provisions In order to ensure that the assessment process is carried out effectively and uniformly, the competence requirements for personnel involved in the entire process shall be defined by the assessment body and, in the case of a third party, be approved by the responsible TCC (in accordance with ISO/IEC 17024). The assessment body shall require its personnel (internal or external) to sign a contract, or other document, by which they commit themselves to comply with the rules defined by the assessment body, including those relating to confidentiality and those relating to independence from commercial and other interests, and from any prior or present link with the persons to be examined that would, in the opinion of the interested parties, compromise impartiality. Clearly documented instructions shall be available to the personnel, describing their duties and responsibilities. These instructions shall be maintained up to date. All personnel involved in any aspect of assessment activities shall possess appropriate educational qualifications, experience and technical expertise, which satisfy defined…