ASTM F876-24由美國材料與試驗協會 US-ASTM 發布于 2024-02-13。
ASTM F876-24在國際標準分類中歸屬于: 23.040.20 塑料管。
ASTM F876-24 交聯聚乙烯 (PEX) 管材的標準規范的最新版本是哪一版?
最新版本是 ASTM F876-24 。
1.1 ?This specification covers crosslinked polyethylene (PEX) tubing that incorporates an optional polymeric inner, middle or outer layer and that is outside diameter controlled, made in nominal SDR9 tubing dimension ratios except where noted, and pressure rated for water at three temperatures (see Appendix X1 ). Included are requirements and test methods for material, workmanship, dimensions, burst pressure, hydrostatic sustained pressure, excessive temperature and pressure, environmental stress cracking, stabilizer functionality, bent-tube hydrostatic pressure, oxidative stability in potable chlorinated water, UV resistance, and degree of crosslinking. Requirements for tubing markings are also given. The components covered by this specification are intended for use in, but not limited to, residential and commercial, hot- and cold-potable water distribution systems, reclaimed water, fire protection, municipal water service lines, building supply lines, radiant heating and cooling systems, hydronic distribution systems, snow and ice melting systems, geothermal ground loops, district heating, turf conditioning, compressed air distribution and building services pipe, provided that the PEX tubing covered herein complies with applicable code requirements. 1.2 ?The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification. 1.3 ?The values stated in either SI units or inch-pound 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. The values given in parentheses are mathematical conversions that may not be exact equivalents to either SI units or inch-pound units and that are provided for information only. 1.4 ?The following safety hazards caveat pertains only to the test methods portion, Section 7 , 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.
交聯聚乙烯管材與聚氯乙烯管材和普通聚乙烯管材相比較,交聯聚乙烯管材不含增塑劑,不會霉變和滋生細菌;不含有害成分,符合FDA標準,可用于飲用水管;耐熱性好,普通聚氯乙烯和聚乙烯管材耐熱為60-75℃,而交聯聚乙烯管材為90℃,最高瞬時溫度可以達到185℃,可耐-75℃低溫;使用溫度范圍寬,可以在-75-95℃條件下長期使用,使用壽命長達50年。...
(1)建筑用冷、熱水供應系統以及管道飲水系統; (2) 建筑用空調冷水系統; (3)民用住宅供暖系統; (4)地面采暖系統; (5)家用熱水器系統配管; (6)食品工業中飲料、酒類、牛奶等流體的輸送管線; (7)化工、石油工業流體輸送管線; (8)制冷系統及水處理系統管線。...
此外,將混煉造粒與擠出成型工序合二為一的“一步法擠出工藝”也值得重視。 雙螺桿擠出機-可向國內外巿場提供各種實芯管、波紋管、鋁塑復合管、聚乙烯交聯(PEX管、冷熱水輸送(PPR管、各種巿政供排水管、電線電纜護套管、超高分子量管、多孔導管、消音下水管等生產線。塑料管材可以滿足建筑與巿政工程以塑代鋼、以塑代水泥等巿場需求。中國管材生產技術已為全球所注目。...
經過交聯改性的聚乙烯可使其性能得到大幅度的改善,不僅顯著提高了聚乙烯的力學性能、耐環境應力開裂性能、耐化學藥品腐蝕性能、抗蠕變性和電性能等綜合性能。而且非常明顯地提高了耐溫等級,可使聚乙烯的耐熱溫度從70℃提高到100℃以上。從而大大拓寬了聚乙烯的應用范圍。 目前,交聯聚乙烯(XLPE)已經被廣泛應用于管材、薄膜、電纜料以及泡沫制品等方面。...
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