Large diameter straight seam steel pipe (LSAW pipe) produces finished products with guaranteed quality, high efficiency and low cost, and relying on the advantage of a vertical weld, it quickly entered the large diameter steel pipe market. The quality can meet the needs of transportation pipelines, piling, steel support, subway columns, octg pipe, steel pipe piles, etc., and the sales volume is very impressive. The main reason is that the price is right. One weld seam is used for specifications below 1020mm, and two weld seams are used for specifications above 1020mm. Two steel plates are spliced together for production, which can reduce costs.
Generally speaking, small-diameter straight seam steel pipes are basically available from stock. Small-diameter steel pipes are easy to store and occupy a small area. They can also be stacked at high places, and the pressure is less. Therefore, large-diameter straight seam steel pipes above 630mm basically have to be custom-made, because the inventory occupies a lot of space and dare not be stacked too high, it is easy to collapse, and the cost of pressing is relatively high.
Generally, the straight seam steel pipe factory is the stock plate or the steel plate fixed by the steel factory, and the delivery cycle is long. For example, the delivery time of 630*12mm normal board is about 7-15 days. Even if there are steel plates in stock, not all wall thicknesses are available. If there is no stock of wall thickness, it can only be fixed in the steel factory, so the production cycle will be extended. It takes about 15-25 days for the steel plate to be delivered at the fastest, and it takes about 5 days to return to the factory for production. Therefore, it takes about 20-30 days for the general raw material steel factory to deliver.
Large-diameter straight seam steel pipes are often used in piling, bridge, support and other projects. Generally, these projects will be booked or planned in advance to avoid delays in the construction period and cause losses. However, there are still some projects that have not been planned and budgeted in advance. If the steel pipes cannot arrive, the project will be delayed and the workers will not be able to work, which will cause economic losses. We can only find the manufacturer to make an urgent order.
