
【国外标准】 Standard Test Method for Outdoor Weathering Exposure of Crosslinked Polyethylene (PEX) Tubing
本网站 发布时间:
2024-02-28
开通会员免费在线看70000余条国内标准,赠送文本下载次数,单本最低仅合13.3元!还可享标准出版进度查询、定制跟踪推送、标准查新等超多特权!  
查看详情>>

适用范围:
5.1 During shipment, storage and installation, PEX tubing may be exposed to UV radiation prior to being shielded from further exposure after installation. The effects of UV exposure on PEX tubing is determined by use of this test method. By first exposing specimens to solar UV radiation and subsequently testing specimens for oxidative resistance or stabilizer functionality, changes as a result of solar UV radiation exposure can be evaluated. This information can be used to determine the maximum allowable total UV exposure prior to permanent shielding provided by installation.5.2 The results of short-term exposure tests can provide an indication of relative outdoor performance, but they should not be used to predict the absolute long-term performance of a material. The results of tests conducted for less than twelve months will depend on the particular season of the year in which they begin.1.1 This test method describes the procedure for exposing crosslinked polyethylene (PEX) tubing produced in accordance with Specification F876 to natural (sunlight) ultraviolet (UV) radiation and evaluating the effects of the exposure. This test method outlines the requirements for specimen size and preparation, exposure orientation, minimum UV exposure energy, post exposure testing and reporting.NOTE 1: While other laboratory UV exposure systems are available, this test method relies on natural sunlight as the UV radiation source. Laboratory methods may be added in the future if testing confirms a correlation between natural sunlight and laboratory exposure.1.2 PEX tubing is not designed for outdoor use. Data from short-term exposure testing per this test method can be used to judge the relative performance of PEX tubing stored outdoors for short periods of time prior to installation completely shielded from sunlight.1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.4 The following precautionary caveat pertains only to the test method and post exposure testing portions, Sections 8 and 9 of this test method. 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.
标准号:
ASTM F2657-21
标准名称:
Standard Test Method for Outdoor Weathering Exposure of Crosslinked Polyethylene (PEX) Tubing
英文名称:
Standard Test Method for Outdoor Weathering Exposure of Crosslinked Polyethylene (PEX) Tubing标准状态:
Active-
发布日期:
-
实施日期:
出版语种:
- 推荐标准
- ASTM E2102-21 Standard Test Method for Measurement of Mass Loss and Ignitability for Screening Purposes Using a Conical Radiant Heater
- ASTM E2103/E2103M-19 Standard Classification for Bridge Elements—UNIFORMAT II
- ASTM E2104-22 Standard Practice for Radiographic Examination of Advanced Aero and Turbine Materials and Components
- ASTM E2106-00(2019) Standard Practice for General Techniques of Liquid Chromatography-Infrared (LC/IR) and Size Exclusion Chromatography-Infrared (SEC/IR) Analyses
- ASTM E2107-20 Standard Practice for Environmental Regulatory Compliance Audits
- ASTM E2108-16 Standard Practice for Calibration of the Electron Binding-Energy Scale of an X-Ray Photoelectron Spectrometer
- ASTM E2109-01(2021) Standard Test Methods for Determining Area Percentage Porosity in Thermal Sprayed Coatings
- ASTM E211-82(2022) Standard Specification for Cover Glasses and Glass Slides for Use in Microscopy
- ASTM E2110-17 Standard Terminology for Exterior Insulation and Finish Systems (EIFS)
- ASTM E2112-23 Standard Practice for Installation of Exterior Windows, Doors and Skylights
- ASTM E2113-23 Standard Test Method for Length Change Calibration of Thermomechanical Analyzers
- ASTM E2114-23 Standard Terminology for Sustainability
- ASTM E2115-22 Standard Guide for Conducting Lead Hazard Assessments of Dwellings and of Other Child-Occupied Facilities
- ASTM E2121-21 Standard Practice for Installing Radon Mitigation Systems in Existing Low-Rise Residential Buildings
- ASTM E2122-22 Standard Guide for Conducting In-situ Field Bioassays With Caged Bivalves