定价： 1177元 / 折扣价： 1001 元

定价： 975元 / 折扣价： 829 元

定价： 975元 / 折扣价： 829 元

定价： 819元 / 折扣价： 697 元

定价： 975元 / 折扣价： 829 元

定价： 1333元 / 折扣价： 1134 元 加购物车

定价： 501元 / 折扣价： 426 元

This specification covers Grade 100 heat-treated alloy steel chain for such applications as slings, lifting assemblies, and load binding. The alloy steel shall be fully killed and have an austenitic grain size of five or finer. The steel shall be made by the electric welding or gas welding process. After welding, alloy steel chain shall be heat treated before applying the proof test. Heat and product analysis shall be performed and shall meet the required chemical composition in carbon, phosphorus, and sulfur. All chain shall be tested to at least the proof load and breaking force test specimen shall consist of a length from the lot containing at least the number of links. All chain shall be in the quenched and tempered condition before the elongation is measured.1.1 This specification covers Grade 100 heat-treated alloy steel chain for such applications as slings, lifting assemblies, and load binding. For overhead lifting applications, only alloy chain should be used.NOTE 1: This specification does not cover alloy steel chain for pocket wheel applications.1.2 This specification is a performance standard for Grade 100 chain used between −20 °F and 400 °F [−29 °C and 205 °C]. The chain manufacturer should be contacted for use at temperatures outside this range.1.3 The chain grade is based on the nominal stress in the link at the design breaking force strength. It is calculated by taking the minimum breaking force load and dividing by two times the nominal cross-sectional area of the link.1.4 The values stated in either SI units or in other units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.4.1 Metric Units—Grade = 1/10 of the minimum breaking force in kilonewtons divided by two times the nominal cross-sectional area in square millimeters. = (MBF)/(0.005)(π)(d)21.4.2 English Units—Grade = 0.000689 of the minimum breaking force in pounds divided by two times the nominal cross-sectional area in square inches. = (0.000689)(MBF)/(0.5)(π)(d)21.4.3 MBF = minimum breaking force (lb or kN); d = chain diameter (in. or mm).NOTE 2: The above formulas are for round diameter links only. If different cross sections are used, the actual cross section of the link would need to be calculated and used.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

This specification covers the attachment, finish, and dimensional requirements for residential chain link fence gates, including frames, posts, fabric, and hardware and accessories associated with them.1.1 This specification covers detail requirements for residential chain link fence gates, gate posts, and accessories.1.2 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

This specification covers chain-link fencing material applications for high security applications. Fabric shall be attached with tie wires or other appropriate fasteners. Fabric shall be attached with tie wires or other appropriate fasteners. Fabric, shall be attached to the terminal post using tension bars with tension bands or vertical straps. Barbed wire shall be installed, in accordance with the requirement, with one or more strands, depending on the degree of security required, or in conjunction with the use of barbed tape obstacles. Fabric shall be secured to tension wire using steel hog rings.1.1 This specification covers chain-link fencing material applications for high security applications.1.2 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.

定价： 0元 / 折扣价： 0 元

This guide establishes the material selection, system design, and layout requirements, aas well as installation procedures for chain link security fence systems intended to substantially increase the difficulty to penetrate, thereby, increasing intrusion delay time. Selection criteria are provided herein for the following materials and fencing components: chain link fabric; fence framework including line posts, terminal posts, and rails; barbed wires; barbed tape obstacles; tension wire; fittings; post ties, rail ties, and hog rings; swing gates; slide gates; and vehicle crash gates. Installation procedures for passive anti-ram systems are also provided herein.1.1 This guide covers the material and installation for selection in the design of a security chain link fence system. The proper material selection, system installation and layout can substantially increase the difficulty to penetrate; thereby, increasing the intrusion delay time.1.2 This guide does not purport to address all of the physical protection security concerns. It is the responsibility of the user of this standard to establish the appropriate design for the level of physical protection required and determine the applicability of regulatory requirements or limitations prior to use.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 It is recommended that Guide F1553 be followed for the format of this guide.1.5 This guide is not intended to set specific requirements for chain link security fencing. It intends to cover the considerations or options pertinent to the design and construction of chain link security fencing.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

This guide is intended for use in any laboratory utilizing PCR or RT-PCR to amplify and detect nucleic acid sequences of mycobacteria from a biological preparation and to identify the species of origin.The criteria used for the identification and evaluation of the amplification reactions should be administered by an individual trained in the use of molecular biological and microbiological techniques associated with PCR and MTB.1.1 This guide covers basic considerations, criteria, principles and recommendations that should be helpful when developing, utilizing, or assessing PCR-specific protocols for the amplification and detection or identification of mycobacterial nucleic acids. This guide is not a specific protocol for the detection of specific mycobacteria. It is intended to provide information that will assist the user in obtaining high quality and reliable data. The guide is closely related to and should be used concurrently with the general PCR Guide E 1873.1.2 This guide has been developed for use in any molecular biology or biotechnology laboratory. It may be useful for the detection of mycobacteria in clinical, diagnostic laboratories.1.3 This guide does not cover details of the various methods such as gel electrophoresis that can be utilized to help identify PCR-amplified mycobacterial nucleic acid sequences, and it does not cover details of instrument calibration.1.4 This guide does not cover specific variations of the basic PCR or RT-PCR technology (for example, quantitative PCR, multiplex PCR and in situ PCR), and it does not cover details of instrument calibration.1.5 Warning-Laboratory work involving certain clinical specimens and microorganisms can be hazardous to personnel. Precaution: Biosafety Level 2 facilities are recommended for potentially hazardous work, and Biosafety Level 3 facilities are required for propagating and manipulating Mycobacteria tuberculosis cultures (). Safety guidelines should be adhered to according to NCCLS M29-T2, I17-P and other recommendations ().

定价： 0元 / 折扣价： 0 元

This specification covers polyvinyl chloride and other conforming organic polymer-coated steel chain-link fabric, coated before weaving. Fabric produced from three classes of wire coatings are covered as follows: Class I consists of polymer coatings extruded over zinc-coated, aluminum-coated, or zinc-5 % aluminum-mischmetal alloy-coated, or zinc-5 % aluminum-mischmetal alloy-coated steel wire; Class 2a consists of polymer coating extruded and adhered to zinc-coated, aluminum-coated, or zinc-5 % aluminum-mischmetal alloy-coated steel wire; Class 2b consists of polymer coating fused and adhered to zinc-coated, aluminum-coated, or zinc-5 % aluminum-mischmetal alloy-coated steel wire. Materials shall be tested and the individual grades shall conform to material, weave, mesh size, diamond count, wire size, fabric height, selvage, breaking strength, weight of Zinc, Aluminum, or Zinc-5 % Aluminum-Mischmetal Alloy Coatings, polymer coating thickness, polymer-coated wire, and roll length.1.1 This specification covers polyvinyl chloride and other conforming organic polymer-coated steel chain-link fabric, coated before weaving. Polyvinyl chloride, polyolefin, and other organic polymer coating hereinafter will be designated as polymer coating.1.2 Fabric produced from three classes of wire coatings are covered as follows:1.2.1 Class I consists of polymer coatings extruded over zinc-coated, aluminum-coated, or zinc-5 % aluminum-mischmetal alloy-coated, or zinc-5 % aluminum-mischmetal alloy-coated steel wire.1.2.2 Class 2a consists of polymer coating extruded and adhered to zinc-coated, aluminum-coated, or zinc-5 % aluminum-mischmetal alloy-coated steel wire.1.2.3 Class 2b consists of polymer coating fused and adhered to zinc-coated, aluminum-coated, or zinc-5 % aluminum-mischmetal alloy-coated steel wire.1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only.1.4 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 carbon steel chain for such applications as railroad cars, construction, industrial uses, load binding, and general purposes other than overhead lifting. The three classes of carbon steel chains covered here include Grade 30 (proof coil chain), Grade 43 (high test chain), and Grade 70 (transport chain). The dimensional requirements of the chain with respect to the appropriate grade and size are presented. The mechanical testing requirements for the steel includes, proof testing, breaking force testing, and elongation testing. One test for breaking strength and elongation shall be made from each lot. The elongation and breaking force tests may be performed at the same time on the same test specimen.1.1 This specification covers carbon steel chain for such applications as railroad cars, construction, industrial uses, load binding, and general purposes other than overhead lifting.NOTE 1: This specification does not cover carbon steel chain for sprocket applications.1.2 Three classes of carbon steel chain are covered:1.2.1 Grade 30—Proof coil chain.1.2.2 Grade 43—High test chain.1.2.3 Grade 70—Transport chain.1.3 The chain grade is based on the nominal stress in the link at the design breaking force strength. It is calculated by taking the minimum breaking force load and dividing by two times the nominal cross-sectional area of the link.1.4 The values stated in either SI units or in other units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.4.1 Metric Units—Grade = 1/10 of the minimum breaking force in kilonewtons divided by two times the nominal cross-sectional area in square millimeters. = (MBF)/(0.005)(π)(d)(d)1.4.2 English Units—Grade = 0.000689 of the minimum breaking force in pounds divided by two times the nominal cross-sectional area in square inches. = (0.000689)(MBF)/(0.5)(π)(d)(d)1.4.3 MBF = minimum breaking force (lb or kN); d = chain diameter (in. or mm).NOTE 2: The above formulas are for round diameter links only. If different cross sections are used, the actual cross section of the link would need to be calculated and used.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

The intended use of this practice is for chain link fencing of varying heights and designs to be used to enclose a sports field, sport court or recreation facility including the internal fencing required for safety, separation of activities, security, crowd control, access and egress or other requirements.Consideration should be given to fence offset distances from the activity field to provide a safety area for the participants and viewers.This practice is not intended for applications where fencing higher than 12 ft (3660 mm) is desired by the owner.Follow Guide F 1553 format to specify the chain link fence material and installation.Warning Regarding Windscreens and Added Fence Padding—If windscreens or padding are to be installed at the time of fence erection or at a later time, it is advisable to use stronger framework, closer post spacing or back bracing of posts depending on the type of screening material to be used, area of the fence covered and the local wind and weather conditions. Post size and spacing based on wind load can be calculated using the Chain Link Fence Manufacturers Institute’(CLFMI) Guide WL 2445.1.1 This practice is designed to be used for developing the chain-link fence, design, layout and installation for sports and recreation facilities such as sports fields, sports courts, waterfront areas, docks and marinas and other specific facilities.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