This specification covers minimum performance standards and test requirements for gap-filling construction adhesives for field-gluing plywood to lumber framing for floor systems. The adhesive shall conform to the strength and durability properties prescribed. The different methods for specimen's preparation are presented in details. The shear strength, gap-filling effect on strength, and durability shall be tested to meet the requirements prescribed.1.1 This specification covers minimum performance standards and test requirements for gap-filling construction adhesives for bonding wood structural panels consisting of plywood or oriented strand board (OSB) to wood based floor system framing, particularly dimension lumber or wood I-joists, at the construction site.1.2 This specification provides a basis for ensuring the quality of the adhesives and is not intended as an application specification.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.4 The following precautionary caveat pertains only to the test method portion, Section 11, of this specification: 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.1.5 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.

定价： 590元 / 折扣价： 502 元 加购物车

This specification covers styrene-maleic anhydride materials suitable for molding and extrusion. It does not however apply to alloys or blends of styrene-maleic anhydride materials with non-elastomeric thermoplastics. The materials shall be conditioned and tested for physical and mechanical properties in the standard laboratory atmosphere. Test specimens and testing parameters for the unreinforced and reinforced, filled, or lubricated materials shall conform to the tensile strength, flexural modulus, Izod impact strength, Vicat softening point, and heat deflection temperature requirements.1.1 This classification system covers styrene-maleic anhydride materials suitable for molding or extrusion. This classification system does not apply to alloys or blends of styrene-maleic anhydride materials with non-elastomeric thermoplastics. Styrene-maleic anhydride materials, being thermoplastic, are reprocessable and recyclable. This classification system allows for the use of those materials provided that all the specific requirements of this classification system are met.1.2 The properties included in this standard are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified by using the suffixes as given in Section 5.1.3 This classification system and subsequent line call out (specification) are intended to provide means of calling out properties of plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Materials should be selected by those having expertise in the plastics field after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, costs involved, and the inherent properties of the material other than those covered by this classification system.1.4 The values stated in SI units are to be regarded as the standard.1.5 The following precautionary caveat pertains only to the test methods portion, Section 11, of this classification system. 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.NOTE 1: There is no known ISO equivalent to this standard.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.

定价： 590元 / 折扣价： 502 元 加购物车

2.1 Fig. 1 provides symbols for strainers, separators, and filters.2.2 Fig. 2 provides symbols for valves. Valves are categorized under the following headings: globe, angle, check, ball, butterfly, gate, relief, manifolds, control, noise control, and miscellaneous.2.3 Fig. 3 provides symbols for valve appendages such as actuators and locking devices. Symbols shown on Fig. 3 are to be combined with the appropriate symbol from Fig. 2.2.4 Fig. 4 provides symbols for piping system–related instrumentation. These symbols are categorized under the following headings: pressure, temperature, flow, level, switches, alarms, and miscellaneous.2.5 Fig. 5 provides symbols for fans, pumps, and turbines.2.6 Fig. 6 provides symbols for plumbing components.2.7 Fig. 7 provides symbols for pipe and pipe fittings.2.8 Fig. 8 provides symbols for noise control components and designations. These symbols are generally used for submarine design.2.9 Fig. 9 provides symbols for transitions. These symbols identify transitions such as pipe material or pipe schedule changes.2.10 Fig. 10 provides symbols for miscellaneous components. These are components which could not be classified under the above categories. Examples include heat exchangers, flasks, and sea chests.2.11 Fig. 11 provides symbols for grooved piping.1.1 This practice establishes piping system drawing symbols for marine use.1.2 This set of standard symbols is intended for use on piping system diagrammatics and arrangements for ships.1.3 Where graphical symbols are required for an item or equipment not covered by this practice, the form and character of the symbol will be left to the discretion of the activity concerned, provided that the symbol used does not duplicate any of those contained herein, and is clearly understandable, subject to one interpretation only, or explained by a suitable note on the drawing when necessary.1.4 Since symbolic representation does not usually involve exact or scale layout or the actual run or leads of piping, the same symbol may be used for all projections of the system (plan, elevations, and sections).1.5 Symbols for fluid power, heating, ventilation, and air conditioning (HVAC), and Navy damage control diagrams are not included in this practice.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.

定价： 843元 / 折扣价： 717 元 加购物车

Safe operation of the unmanned aircraft is of the primary importance to the unmanned aircraft industry and for successful integration of unmanned aircraft with manned aircraft in civil airspace. Operators and pilots-in-command of unmanned aircraft systems shall comply with applicable Federal Aviation Regulations (14 CFR Part 43, 14 CFR Part 71, 14 CFR Part 73, 14 CFR Part 91, 14 CFR Part 93, and 14 CFR Part 99). This standard includes the minimum additional methods that should be followed by unmanned aircraft system operators, including pilots-in-command, on every visual range flight to ensure the safe operation of the aircraft and safety of people and property in the air and on the ground. This visual range flight operation standard shall be used in conjunction with appropriate unmanned aircraft system airworthiness and pilot qualification standards.1.1 This practice prescribes guidelines that govern the visual flight operation of unmanned aircraft systems in civil airspace in order to provide for the safe integration of unmanned aircraft flight operations with manned aircraft flight operations.1.2 This practice applies to those operations conducted for civil purposes other than sport or recreation that remain within the visual range of the pilot in command (see Terminology F 2395 for a definition of "visual range").1.3 This practice complies with the known rules, regulations, and public law available at the time of its publication. Should any conflict with a rule, regulation, or public law arise, the user must comply with rule and should notify ASTM of the conflict.This practice only prescribes accepted methods for visual range flight operation of unmanned aircraft systems.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.

定价： 0元 / 折扣价： 0 元

Designing, manufacturing, testing, and maintaining an unmanned aircraft system to comply with industry standards and recommended practices supports development of a certification package that helps ensure its reliability and can lead to its airworthiness certification. Government aviation authorities’ airworthiness certification processes exist to provide some level of assurance that critical systems will operate reliably and pose minimal risk to persons and property. The use of proven standards and practices in the design, manufacture, and test of these systems, especially for the mission critical components, contributes to this goal, as well as streamlining the certification process and simplifying the system test requirements. While developing to a set of standards and practices will not guarantee certification, the ability to show compliance with established standards provides the basis for a well-documented certification approval package.Compliance with established standards and practices also provides assurance that a given component will function as intended in the specified environment and conditions. The standards cited in these practices have been developed by recognized standards-developing agencies; some are accepted by government aviation authorities as an acceptable means of compliance with airworthiness requirements. By their inclusion in these practices, they are considered to be consensus-based for unmanned aircraft-related purposes.1.1 These practices identify existing regulations, standards, specifications, and handbooks to guide the design, manufacture, test, repair, and maintenance of unmanned aircraft systems and their components.1.2 ApplicabilityThese practices apply to unmanned, powered, fixed wing aircraft and rotorcraft systems seeking government aviation authority approval in the form of airworthiness certificates, flight permits, or other like documentation. It is intended to be used as a reference by unmanned aircraft system designers and manufacturers, as well as by procurement authorities, to help ensure the airworthiness of these systems.1.3 These practices provide a starting point for developing a standards-based airworthiness certification package for consideration by regulatory authorities. It lists those top-level standards applicable to the major subsystems and components of an unmanned aircraft system. It assumes that Original Equipment Manufacturer (OEM)-provided subsystems and components, purchased and installed as a unit (for example, Global Positioning Systems), are themselves built to applicable standards that are not necessarily listed in these practices. These practices include standards for technologies that are currently in use in unmanned aircraft, as well as those that are not yet, but could be used in the future (for example, radioisotope thermoelectric generators).1.4 Suggested changes, corrections, or updates should be forwarded to Committee F38.1.5 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 and health practices and determine the applicability of regulatory limitations prior to use.

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