This recommended practice establishes performance criteria and characterization techniques for radiation measurement systems incorporated onto unmanned aerial systems, or UARaMS. The recommended practice provides a means to accurately assess a UARaMSs effectiveness to either search/localize a radiological source or characterize/map radioactive contamination. It outlines measurement expectations, functionality characterization tests, and functionality needs based on available radiation response… read more information, test results, and expected radiation fields at applicable heights above ground level (AGL). This recommended practice does not address individual unmanned aircraft system (UAS) performance or operations such as those items required for operation and control. The document looks at operational scenarios, detection needs and expectations, and environmental parameters that could be experienced during use such as temperature changes, mechanical shock, and onboard vibration. For radiation, response vectors include those expected from distributed contamination and from point sources. The primary unmanned aerial vehicles (UAVs) of interest include those from Group 1 and Group 2 UAV designations. read less

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This standard specifies the basic performance requirements for mobile radiation-detection systems used in homeland security applications. These systems are used to detect gamma radiation and may include neutron detection and/or the identification of gamma-ray emitting radionuclides. They are typically placed in vehicles where they are used either while moving or when stationary. This standard establishes the radiological performance and testing requirements and those requirements associated… read more with the expected electrical, mechanical, and environmental conditions while in use. read less

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This standard establishes minimum performance criteria and test requirements for non-alarming radiation detectors used to manage the exposure of emergency responders to photon radiation.

定价： 69元 / 折扣价： 59 元

This standard applies to security screening systems that utilize millimeter wave (MMW) radiation to actively inspect persons who are not inside vehicles, containers, or enclosures. The standard is applicable to systems used to detect concealed objects carried on the body of the individual being screened at a security checkpoint. The standard addresses monostatic, bistatic, or multistatic MMW systems. Walk-though systems can be tested using the standard. This document focuses on the imagery that… read more is presented to an Automated Threat Recognition (ATR) algorithm, not the imagery presented to a human screener. This standard applies to systems that are primarily imaging but that also may have complementary functionality such as materials discrimination. This standard does not address how to test these complementary functions. The standard describes tools, objectively-analyzed test methods, and image quality metrics for characterizing the imaging performance of the system but not for its operational performance. For the purposes of this standard, the test objects herein are appropriately applied to characterize systems that use radiation from 3 GHz to 150 GHz (100 mm to 2 mm wavelength). The standard is limited to tests related to image quality or functional factors that affect image quality. It does not, for example, include tests or requirements for electrical safety, or electromagnetic interference or immunity. The standard does not specify minimum or baseline performance requirements (pass-fail thresholds). read less

定价： 119元 / 折扣价： 102 元

This standard specifies the notation of radiation data and some non-radiation data that is streamed digitally in real-time from a radiation detection instrument to a receiving device (e.g., smartphone or tablet). ISO/IEC 8824-1 Abstract Syntax Notation One (ASN.1) is used for specifying the format of the data to be streamed. The standard addresses both lower-bandwidth transmission, corresponding to instruments that generate data on the order of several kilobit per second (kb/s), and higher-… read more bandwidth transmission. The radiation data consist mainly of raw or unprocessed data, but other data such as precise time, dosimetric data, device parameters and settings applicable to the further display, processing, or analysis of the data may be streamed as well. Data format for commands from the receiving device to the measurement instrument is not part of this standard. This standard does not address data format for visual data (e.g. photos, videos), for radiation imagers or LiDAR (Light Detection And Ranging, or Laser Imaging, Detection, And Ranging). The transmission protocol is not part of the standard, although some general transmission rules recommendations are provided. The subsequent display, processing, and analysis of the radiation data on the receiving device are outside the scope of this standard. The standard does not address the transmission media, receipt, and later transmission of data to a larger and distant network or how the data is used and processed on the receiving device. read less

定价： 133元 / 折扣价： 114 元

GB/T 9124的本部分规定了PN系列钢制管法兰和法兰盖的类型与参数、型式与尺寸、技术要求、试验、检验与验收、标志与标记、供货要求。
本部分适用于公称压力PN2.5~PN400、公称尺寸DN10~DN4000的钢制管法兰和法兰盖。

定价： 191元 / 折扣价： 163 元 加购物车

本文件规定了PN系列铸铁管法兰和法兰盖的类型与参数、型式与尺寸、技术要求、压力试验、检验与验收、标志与标记、订货要求及包装。
本文件适用于材料为灰铸铁、球墨铸铁、可锻铸铁，公称压力PN 2.5～PN 63，公称尺寸DN 10～DN 4000的铸铁管法兰和法兰盖。

定价： 81元 / 折扣价： 69 元 加购物车

本文件规定了PN系列管法兰用非金属平垫片的型式、材料、要求、试验方法、检验规则、标记和标志以及包装和贮运。本文件适用于公称尺寸小于或等于DN 4 000、公称压力PN 2.5～PN 63的非金属平垫片。

定价： 38元 / 折扣价： 33 元 加购物车

本文件规定了PN标识的管法兰用缠绕式垫片（以下简称“垫片”）的型式与代号，尺寸，技术要求，检验方法，检验规则，标记、标志、订货信息、包装和贮运。
本文件适用于GB/T 9124.1规定的公称压力为PN 10～PN 250、公称尺寸为DN 10～DN 3 000的管法兰用缠绕式垫片。

定价： 49元 / 折扣价： 42 元 加购物车

GB/T 19066的本部分规定了PN标识的管法兰用金属波齿复合垫片（以下简称“波齿垫片”）的型式与代号，尺寸，技术要求，检验方法，检验规则，标记、标志、包装、运输及贮存。
本部分适用于公称压力为PN 10～PN 250、公称尺寸为DN 10～DN 2 000的波齿垫片。

定价： 38元 / 折扣价： 33 元 加购物车

GB/T 39245的本部分规定了PN标记的钢制管法兰用带覆盖层金属齿形组合垫片（以下简称金属齿形组合垫片）的型式及代号、尺寸、要求、检验、标记及标志、包装及贮运。
本部分适用于公称压力不大于PN160、公称尺寸不大于DN2 000的金属齿形组合垫片。

定价： 31元 / 折扣价： 27 元 加购物车

本文件规定了形成密封副的PN系列钢制管法兰、垫片、紧固件配合选用的规则。本文件适用于GB/T 9124.1-2019所规定的PN系列钢制管法兰以及与之配合使用的垫片和紧固件。

定价： 43元 / 折扣价： 37 元 加购物车

GB/T 9125的本部分规定了PN系列钢制管法兰连接用紧固件的结构型式、尺寸和公差、材料、制造和热处理、检验和验收、产品质量证明书、标记和标志、防护和包装的要求。
本部分适用于GB/T 9124.1中规定的钢制管法兰连接用紧固件（包括六角头螺栓、等长双头螺柱、全螺纹螺柱和螺母）。

定价： 113元 / 折扣价： 97 元 加购物车

本文件规定了PN标记的钢制管法兰用金属环垫的型式与代号、尺寸、材料和制造、要求、试验方法、检验规则以及标记、标志、包装和贮运。本文件适用于GB/T 9124.1所规定的公称压力PN 63~PN 400的环连接密封面钢制管法兰用金属环垫。

定价： 38元 / 折扣价： 33 元 加购物车

本文件规定了PN标记的管法兰用柔性石墨复合增强垫片的型式与代号，材料和工艺，要求，检验方法，检验规则，标记、标志、包装、运输和贮存。
本文件适用于公称压力为PN 2.5～PN 63、公称尺寸为DN 10～DN 2 000的管法兰用柔性石墨复合增强垫片。

定价： 38元 / 折扣价： 33 元 加购物车