![]() The connection is enhanced by the memory effect of the tubing, thereby not solely relying on the crimping mechanism for its security. ![]() ![]() ![]() With the ASTM F1960 design, the expanded tubing end is allowed to retract onto the fitting to form the seal with the aid of a ring. The tool is turned multiple times until the tubing is expanded to the manufacturer’s specifications. To use cold-expansion fittings, an expander tool is placed inside the tubing to enlarge the PEX. Compared to insert fittings, cold-expansion fittings produce a more consistent connection due to the inherent shape memory of PEXa pipe. PEXa is the most flexible, enabling the use of cold-expansion fittings as well as a tighter bend radius. There are three crosslinking production methodologies for PEX (known as a, b, and c). By taking advantage of the flexibility of PEX in piping layout design, the multiport tee configuration significantly reduces the number of fittings required. ![]()
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