T/CPPIA 16-2022 Active

Scope: This document specifies the materials, requirements, inspection rules, and marking, packaging, and transportation for reinforced cold expansion fittings for cross-linked polyethylene (PE-X) pipes, and describes the corresponding test methods. It also defines relevant terms and definitions. This document applies to the design, production, inspection, sales, and assembly of reinforced cold expansion fittings (including fittings bodies and reinforcing rings) for cross-linked polyethylene (PE-X) pipes used in building hot and cold water piping systems (including industrial and civil hot and cold water, drinking water, and heating systems, etc.). Main technical content: 5.1 Color 5.1.1 The fittings body made of polysulfone is generally black. 5.1.2 The fittings body made of copper alloy is generally copper-colored. 5.1.3 The reinforcing ring is generally unpainted. 5.2 Appearance 5.2.1 The fittings body made of polysulfone should be free of water marks, and the parting surface should be free of burrs, color spots, depressions, and other defects that affect performance. 5.2.2 The fittings body made of copper alloy should be free of cracks, pores, bubbles, impurities, sand holes, and other defects that affect performance. 5.2.3 The threads should be intact and regular, free from broken teeth, indentations, burrs, scratches, and other defects. 5.2.4 The reinforcing ring should be smooth, flat, and clean, free from obvious scratches, depressions, bubbles, impurities, color differences, and other defects that affect performance. 5.3 Dimensions and specifications 5.3.1 Fittings body dimensions 5.3.1.1 The schematic diagram of the fittings body is shown in Figure 1. 5.3.1.2 The insertion dimensions of the fittings body made of polysulfone shall comply with the provisions of Table 2. 5.3.1.3 The insertion dimension deviation of the fittings body made of polysulfone shall comply with the requirements of Table 3. 5.3.1.4 The flying edges and misalignments caused by mold