1, pipes and fittings should be stored in a well-ventilated warehouse or simple shed with a temperature not exceeding 40℃. 2, the pipe should be horizontally stacked on a flat bracket or on the ground. The stacking height should not exceed1.5m. When the pipes are bundled into a square bundle of 1mx 1m, the stacking height can be appropriately increased, but it should not exceed 3m. Pipe fittings should be stacked in an orderly way step by step to ensure no collapse and facilitate access and management. 3. When pipes and fittings are temporarily stacked outdoors, they should be covered. 4. When pipes are stored, pipes with different diameters and wall thicknesses should be stacked separately.