PEX油管的ABC

PEX油管的ABC

PEX tubing was invented in 1968 by a German scientist named Thomas Engle and introduced to the U.S. 1980年左右. The many benefits have made PEX tubing a popular choice for plumbing systems, 比如负担能力, 灵活性, 快速安装, 以及耐腐蚀性能. The most common residential PEX tubing construction sizes range from 1/2” to 1”. PEX tubing is rated up to 180°F at 100 PSI.

PEX stands for cross-linked polyethylene. Polyethylene is composed of chains of ethylene molecules referred to as polymers. These polymers don’t connect, which is what gives polyethylene its 灵活性. Polyethylene is produced in two main forms: high density (HDPE) and low density (LDPE).

All PEX tubing is formed via extrusion, a process which subjects the HDPE to heat and pressure through a dye. The material must adhere to the same ASTM F876 and ASTM F877 standards, along with SDR9 dimensional standard for use in the United States. This would include the following criteria:

• Pressure and temperature ratings
• 最小弯曲半径
• Pipe wall thickness and Inside Diameter (ID)/Outside Diameter (OD) dimensions

PEX tubing is classified under three categories: A, B, and C. These letters aren’t grades as they are used to identify the manufacturing process and have nothing to do with quality or performance. Learn about how the different types of PEX compare to each other:

如何选择PEX类型? For hot and cold water plumbing as well as for open-loop systems, both PEX-A and PEX-B are evident choices. 然而, PEX-B offers a more attractive combination of better health safety, 高耐用性, 更低的价格. 对于地脚线, 散热器, 地板辐射采暖, 雪融化, and other types of closed-loop heating systems, any PEX tubing type can be selected according to personal preferences or various comparison factors previously mentioned.

Additional factors influence the applications of each PEX type, 如弯曲半径, 压降, 壁厚. 除了, PEX tubing sizes are signified by CTS (copper tubing size), not OD (outside diameter) or ID (inside diameter). To dig deeper into the different types of PEX tubing and fittings, take the PEX管材及配件 AYU course, called our customer service department at 1-800-292-2737, or fill out a 联络表格 在713553.com.