定价： 3549元 / 折扣价： 3017 元

1.1 This classification system covers thermoplastic materials, used as joining materials, for the creation of joints between similar or dissimilar materials, to produce finished products or parts that are intended to be disassembled and/or reassembled.1.2 This class of materials enables disconnection of the different parts or layers of a products for refurbishing, repair and full recovery and recycling of the joined materials, for instance at the end of life of the product(s), enabling the reuse of valuable resources, and hence reducing adverse impact on the environment.1.3 The properties included in this classification system are those required to identify the materials covered. It is possible that there are other requirements necessary to identify particular characteristics important to specialized applications. One way of specifying them is by using the suffixes as given in Section 5.1.4 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection is best made by those having expertise in the plastic 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, the costs involved, and the inherent properties of the material other than those covered by this classification system.1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.6 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: Application examples are fully recyclable mattresses and floor coverings. These products can be disassembled into its different parts, by using heat, for refurbishing, repair and full recovery and recycling of the joined materials at the end of the product’s life.1.7 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 is intended to provide a callout system for thermoplastic polyester (TPES) injection and extrusion materials, both virgin and recycled, based on ISO test methods. However, the proportions of recycled material used, and the nature and amount of any contaminant, as well as the selection of materials cannot be covered practically in this specification. Materials are classified into groups according to their composition, and are further subdivided into classes and grades as specified. Individual groups shall be identified in accordance to performance properties as to tensile strength, tensile modulus, Charpy impact strength, deflection temperature, melt flow rate, and density.1.1 This classification system covers thermoplastic polyester materials suitable for molding or extrusion.1.2 This classification system allows for the use of recycled thermoplastic polyester materials provided that the requirements as stated in this classification system and subsequent line callout (specification) are met. The proportions of recycled material used, as well as the nature and amount of any contaminant, however, cannot be covered practically in this specification.1.3 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 5.1.4 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can be made by those having expertise in the plastic field only after careful consideration of the design and performance required of the part, the environment to which it will be exposed, the fabrication process to be used, the costs involved, and the inherent properties of the material other than those covered by this specification.1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.6 The following hazards caveat pertains only to the test methods 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 and health practices and determine the applicability of regulatory limitations prior to use.NOTE 1: This standard and ISO 7792-1:2012 and ISO 7792-2:2012 address the same subject matter, but differ in technical content.

定价： 590元 / 折扣价： 502 元 加购物车

This specification describes a medium access control (MAC) and physical layer (PHY) specification for wireless connectivity using dedicated short-range communications (DSRC) services. This standard is based on and refers to IEEE Standards 802.11, Wireless LAN Medium Access Control and Physical Layer Specifications, and 802.11a, Wireless LAN Medium Access Control and Physical Layer Specifications High-Speed Physical Layer in the 5 GHz Band, with permission from the IEEE society. This specification is meant to be an extension of IEEE 802.11 technology into the high-speed vehicle environment. The difference between IEEE 802.11 and IEEE 802.11a operating parameters required to implement a mostly high-speed data transfer service in the 5.9-GHz Intelligent Transportation Systems Radio Service (ITS-RS) Band is explained. Potential operations within the Unlicensed National Information Infrastructure (UNII) Band are also addressed, as appropriate.1.1 This specification2 describes a medium access control (MAC) and physical layer (PHY) specification for wireless connectivity using dedicated short-range communications (DSRC) services. This standard is based on and refers to IEEE Standards 802.11, “Wireless LAN Medium Access Control and Physical Layer Specifications,” and 802.11a, “Wireless LAN Medium Access Control and Physical Layer Specifications High-Speed Physical Layer in the 5 GHz Band,” with permission from the IEEE Society. This specification is meant to be an extension of IEEE 802.11 technology into the high-speed vehicle environment. As presented here, this specification contains just enough information to explain the difference between IEEE 802.11 and IEEE 802.11a operating parameters required to implement a mostly high-speed data transfer service in the 5.9-GHz Intelligent Transportation Systems Radio Service (ITS-RS) band. Potential operations within the Unlicensed National Information Infrastructure (UNII) band are also addressed, as appropriate.1.2 Purpose—The purpose of this specification is to provide wireless communications over short distances between information sources and transactions stations on the roadside and mobile radio units, between mobile units, and between portable units and mobile units. The communications generally occur over line-of-sight distances of less than 1000 m between roadside units and mostly high-speed, but occasionally stopped and slow-moving, vehicles or between high-speed vehicles. This specification also offers regulatory bodies a means of standardizing access to the 5.9-GHz frequency band for the purpose of interoperable communications to and between vehicles at line-of-sight distances on the roadway.1.3 Specifically, this specification accomplishes the following:1.3.1 Describes the functions and services required by a DSRC and IEEE 802.11-compliant device to operate in a high-speed mobile environment.1.3.2 Refers to IEEE 802.11 MAC procedures.1.3.3 Defines the 5.9-GHz DSRC signaling technique and interface functions that are controlled by the IEEE 802.11 MAC.1.3.4 Permits the operation of a DSRC-conformant device within a DSRC communications zone that may coexist with multiple overlapping DSRC communication zones.1.3.5 Describes the requirements and procedures to provide privacy of user information being transferred over the wireless medium and authentication of the DSRC or IEEE 802.11-conformant devices.1.4 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

This guide describes methods of testing and specifications for electrical insulating oils of petroleum origin intended for use in electrical cables, transformers, oil circuit breakers, and other electrical apparatus where the oils are used as insulating, or heat transfer media, or both. This guide is classified into the following categories: sampling practices, physical tests, electrical tests, chemical tests, and specifications. The test methods shall be as follows: aniline point; coefficient of thermal expansion; color; examination; flash and fire point; interfacial tension; pour point of petroleum products; refractive index; relative density; specific heat; thermal conductivity; turbidity; viscosity; dielectric breakdown voltage; dissipation factor and relative permittivity; gassing tendency; resistivity; stability under electrical discharge; acidity; carbon-type composition; compatibility with construction material; copper content; furanic compounds; gas analysis; gas content; inorganic chlorides and sulfates; neutralization numbers; oxidation inhibitor content; oxidation stability; polychlorinated biphenyl content; sediment and soluble sludge; sulfur; water content; mineral insulating oil for electrical apparatus; and high firepoint electrical insulating oils.1.1 This guide describes methods of testing and specifications for electrical insulating liquids intended for use in electrical cables, transformers, liquid-filled circuit breakers, and other electrical apparatus where the liquids are used as insulating, or heat transfer media, or both.1.2 The purpose of this guide is to outline the applicability of the available test methods. Where more than one is available for measuring a given property, their relative advantages are described, along with an indication of laboratory convenience, precision, (95 % confidence limits), and applicability to specific types of electrical insulating liquids.1.3 This guide is classified into the following categories: Sampling Practices, Physical Tests, Electrical Tests, Chemical Tests, and Specifications. Within each test category, the test methods are listed alphabetically by property measured. A list of standards follows:Category Section ASTM StandardSampling:  3 D923Physical Tests:     Aniline Point  4 D611 Coefficient of Thermal Ex-  pansion  5 D1903 Color  6 D1500 Examination: Visual Infrared  7 D1524, D2144, D2129 Flash and Fire Point  8 D92 Interfacial Tension  9 D971 Pour Point of Petroleum  Products 10 D97, D5949, D5950 Particle Count in Mineral  Insulating Oil 11 D6786 Refractive Index and Specific  Optical Dispersion 12 D1218 Relative Density (Specific  Gravity) 13 D287, D1217, D1298, D1481, D4052 Specific Heat 14 D2766 Thermal Conductivity 15 D2717 Viscosity 16 D445, D2161, D7042Electrical Tests:     Dielectric Breakdown Voltage 17 D877, D1816, D3300 Dissipation Factor and Rela-  tive Permittivity (Dielectric   Constant) 18 D924Gassing Characteristic  Under Thermal Stress 19 D7150 Gassing Tendency 20 D2300 Resistivity 21 D1169Chemical Tests:     Acidity, Approximate 22 D1534 Carbon-Type Composition 23 D2140 Compatibility with Construc-  tion Material 24 D3455 Copper Content 25 D3635 Elements by Inductively  Coupled Plasma (ICP-AES) 26 D7151 Furanic Compounds in  Electrical Insulating Liquids 27 D5837 Dissolved Gas Analysis 28 D3612 Gas Content of Cable and  Capacitor Liquids 29 D831, D1827, D2945 Neutralization (Acid and  Base) Numbers 30 D664, D974 Oxidation Inhibitor Content 31 D2668, D4768 Oxidation Stability 32 D1934, D2112, D2440 Polychlorinated Biphenyl  Content (PCB) 33 D4059 Sulfur, Corrosive 34 D1275 Water Content 35 D1533Specification:     Mineral Insulating Liquid for  Electrical Apparatus 36 D3487 Less Flammable Electrical  Insulating Liquids 37 D5222 Silicone Fluid used for Electrical  Insulation 38 D4652 Natural (Vegetable Oil) Ester   Fluids used in Electrical  Apparatus 39 D68711.4 The values stated in SI units are to be regarded as standard. The values stated in parentheses are provided for information only.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.

定价： 646元 / 折扣价： 550 元 加购物车

This specification covers requirements and test methods for geotextile fabrics and associated components used in temporary silt fence applications. It is applicable to the use of a geotextile as a vertical permeable interceptor designed to remove suspended soil from overland, nonconcentrated water flow. The function of a temporary silt fence is to trap and allow settlement of soil particles from sediment laden water. The purpose is to greatly limit the transport of eroded soil from the construction site by water runoff. Fibers used in the manufacture of geotextiles for silt fence, and the threads used in joining geotextiles by sewing, shall consist of long-chain synthetic polymers composed of at least 95 % by weight of polyolefins or polyester. They shall be formed into a stable network such that the filaments or yarns retain their dimensional stability relative to each other, including selvages. Geotextiles and related materials used for temporary silt fence shall conform with required grab strength, permittivity, apparent opening size, and ultraviolet stability. The prescribed support posts are described in the specification.1.1 This specification covers requirements and test methods for geotextile fabrics and associated components used in temporary silt fence applications. Table 1 is a material purchasing specification based on AASHTO M 288. Table 2 is a specification to be used in areas of high water flow. The specification in Table 2 is a higher strength, higher flow option than Table 1. Table 2 properties can withstand more hydraulic flow than the specification listed in Table 1. The Table 2 specification should be used in sensitive applications, such as areas near regulated waters and wetlands, but also areas that are prone to high flow runoff that require increased structural stability. The design professional has the option of Table 2 where the specifications listed in Table 1 are not sufficient to meet the demand of runoff.1.2 Both specifications are applicable to the use of a geotextile as a vertical permeable interceptor designed to remove suspended soil from overland, nonconcentrated water flow. The function of a temporary silt fence is to trap and allow settlement of soil particles from sediment-laden water. The purpose is to greatly limit the transport of eroded soil from construction sites and other areas affected by water runoff.NOTE 1: It should be noted that proper installation and maintenance are critical for the effective functioning of silt fence.1.3 The tests used to characterize the silt fence are intended to ensure good workmanship and quality and are not necessarily adequate for design purposes in view of the wide variety of possible sediments and performance objectives.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.NOTE 2: Although the Table 1 specification should be acceptable in most erosion control applications, it should be noted that an alternative silt fence specification for a higher water flow rate, listed in Table 2, may be required by the engineers in areas that are susceptible to higher water runoff; using Table 2 specification will minimize safety hazards such as hydroplaning in these areas.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： 515元 / 折扣价： 438 元 加购物车

Table of ContentsSection Title Section/Paragraph  1 Referenced Documents 2 Terminology 3 Significance and Use 4Pole and Tree Climbers   Classification 5 Ordering Information 6 Pole and Tree Climbers 7 Climber Gaffs 8 Climber Straps 9 Climber Pads 10 Climber Footplates 11Body Belts, Positioning Devices and Wood Pole Fall Restriction Devices (WPFRD)   Classification 12 Ordering Information 13 Two Dee Body Belts, Auxiliary Positioning Belts, and Four Dee Body Belts 14 Two Dee Body Belts 14.1 Auxiliary Positioning Belts and Four Dee Body Belts 14.2 Positioning Devices 15 Wood Pole Fall Restriction Device (WPFRD) 16 Arborist Saddle  17Harnesses   Classification 18 Ordering Information 18.2 Sizing 18.3 Marking 18.4Energy Absorbing Lanyards   Classification 19 Ordering Information 20 Energy Absorbing Lanyards 21Qualification Testing   After Exposure to an Electric Arc 22 Hardware Requirements 23 Test Equipment 24 Qualification Testing 25 Body Belts, Four Dee Body Belts, and Auxiliary Positioning Belts 25.1 Positioning Devices 25.2 WPFRD 25.3 Arborist Saddle 25.4 Harness 25.5 Energy Absorbers 25.6 Instructions 26 Guarantee and Rejection 27 Keywords 281.1 This standard covers the specifications and qualification testing of the following:Climbers,Climber straps,Climber Pads,Climber Footplates,Body Belts,Work Positioning Devices with Locking Snaphooks/Carabiners,Wood Pole Fall Restriction Devices (WPFRD),Arborist Saddle,Harnesses,Energy Absorbing Lanyards.These devices are used by workers in the climbing of poles, trees, towers, and other structures. Minimum performance criteria for harnesses and energy absorbing lanyards in arresting a fall after exposure to electric arcs are included for workers who may be exposed to thermal hazards of momentary electric arcs or flame.1.2 Equipment may fall within one of the following categories:1.2.1 Fall (Travel) Restraint—Prevents a user from reaching a fall hazard (allow 0 fall distance).1.2.2 Work Positioning—Allows a 2 ft maximum free fall distance.1.2.3 Fall Arrest—Allows a 6 ft maximum free fall distance with a maximum arrest force of 1800 lb.NOTE 1: Under certain conditions and with the use of equipment designed for such conditions, a 12-ft free-fall distance with a maximum arrest force of 1800 lb is allowed.1.2.4 Suspension—Allows 0 free-fall distance while supporting the user’s weight.1.2.5 Fall Restriction—to prevent or limit free fall from a work position or while ascending/descending a wood pole.1.3 Three types of climbers, (Types A, B, and C) and two types of climber straps, Types (A and B) are covered.1.4 Two types of body belts, (Types A and B) are covered.1.5 Eight types of work positioning devices: three positioning straps, (Types A, B, and C), three adjustable-positioning lanyards, (Types A, B and C) and two nonadjustable positioning lanyards, (Types A and B) are covered.1.6 Two types of WPFRD, (Types A and AB) are covered.1.7 Arborist saddle, (Type A) Work Positioning and Suspension are covered.1.8 Two types of harnesses, (Types A and B) are covered.1.9 Two types of energy absorbing lanyards, (Types A and B) are covered.1.10 The values stated in United States customary 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.1.11 The following safety hazards caveat pertains only to the test method portions, 9.2, 10.3, 11.2, 14.1.4, 15.3, 15.4, 16.2, 17.2, 18.4, 21.2, 22, 23, and 25 of this standard: 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.1.12 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

定价： 592元 / 折扣价： 504 元

定价： 1502元 / 折扣价： 1277 元