Heavy-Duty Precast Concrete Pipe Molds: Dimensional Tolerances, Anti-Deformation Design & Release Agent Guide

1. Material Selection & Steel Plate Standards

2. Permissible Dimensional Tolerances per International Standards

Internal Diameter ($D_i$)$\pm 1.0\%$ (Max $\pm 10\text{ mm}$)$\pm 0.8\%$ (Max $\pm 8\text{ mm}$)$\le \pm 2.0\text{ mm}$ Mold End Ring Circularity (Ovality)$\le 0.5\%$ of diameter$\le 0.4\%$ of diameter$\le 1.5\text{ mm}$ total variance End Face Perpendicularity$\le 2.0\text{ mm}$ across face$\le 1.5\text{ mm}$ across face$\le 1.0\text{ mm}$ across face Longitudinal Straightness$\le 3.0\text{ mm per } 2.5\text{m}$$\le 2.5\text{ mm per } 2.5\text{m}$$\le 1.5\text{ mm}$ total length Joint Profile (Gasket Groove)$\pm 0.8\text{ mm}$$\pm 0.5\text{ mm}$$\pm 0.3\text{ mm}$ (CNC machined)