During the manufacturing process of straight seam steel pipes, manufacturers need to have excellent control over the extrusion pressure. This is because during welding, when the temperature of the two pipe blank edges reaches the welding temperature, pressure is applied to them. This pressure allows their metal grains to penetrate each other, producing tightly bonded crystals, achieving a strong weld. However, if the extrusion pressure is insufficient, crystals cannot form well, resulting in low weld strength and easy cracking due to external forces during use. Conversely, if the extrusion pressure is too high, the weld metal reaching the welding temperature will be squeezed out of the weld, leaving very little metal that reaches the required temperature for actual welding. This reduces the amount of crystals, leading to a weak weld and large burrs, exacerbating the defects.
1. Choosing a Suitable Site and Warehouse
(1) The site or warehouse for storing steel pipes should be clean, well-drained, and far away from factories or mines that produce harmful gases or dust. The site should be free of weeds and debris to keep the steel pipes clean.
(2) Steel pipes must not be stored together with materials corrosive to steel pipes, such as acids, alkalis, salts, and cement. Different types of steel pipes should be stored separately to prevent confusion and contact corrosion.
(3) Large structural steel, rails, thin steel plates, large-diameter steel pipes, forgings, etc., can be stored in the open air.
(4) Medium and small structural steel, wire rods, reinforcing bars, medium-diameter steel pipes, steel wires and wire ropes, etc., can be stored in ventilated sheds, but covered and padded.
(5) Some small steel pipes, thin steel plates, steel strips, silicon steel sheets, small-diameter or thin-walled steel pipes, various cold-rolled and cold-drawn steel pipes, and high-priced, easily corroded metal products can be stored in warehouses.
(6) Warehouses should be selected according to geographical conditions. Generally, ordinary enclosed warehouses are used, i.e., warehouses with roofs, walls, tight doors and windows, and ventilation devices.
(7) Warehouses should be well-ventilated on sunny days and closed to prevent moisture on rainy days, maintaining a suitable storage environment at all times.
2. Reasonable Stacking and Prioritization
(1) The principle of stacking is to ensure stable and secure stacking, and to stack materials according to variety and specifications. Different varieties of materials should be stacked separately to prevent confusion and cross-corrosion.
(2) It is forbidden to store items that corrode steel pipes near the stacking location.
(3) The bottom of the stack should be raised, firm, and flat to prevent materials from getting damp or deformed.
(4) The same type of material should be stacked separately according to the order of its arrival in the warehouse to facilitate the implementation of the first-in-first-out principle.
(5) For steel sections stacked in the open air, there should be wooden pads or stone strips underneath, and the stack surface should be slightly tilted to facilitate drainage. Care should be taken to ensure that the materials are placed straight to prevent bending and deformation.
(6) The stacking height should not exceed 1.2m for manual operations and 1.5m for mechanical operations. The stack width should not exceed 2.5m.
Post time: Feb-04-2026