Spiral steel pipe manufacturer

Description :

　　The good performance of spiral steel pipes has been recognized by more customers in the domestic market. In addition to the quality advantage of this product, comprehensive service is also the key to its popularity in the market. Therefore, for spiral steel pipe production enterprises, while continuously increasing their research efforts, they should not forget to increase their software strength. It has been proven that the future spiral steel pipe market will be a comprehensive competition for production enterprises. This has been recognized by many production enterprises nowadays. Due to the high material, technical performance, and production technology requirements of hot-rolled coils, on the one hand, there are fewer domestic manufacturers that meet the standards than steel plate manufacturers. On the other hand, their production process and quality level determine that their market price is also higher than hot-rolled steel plates. This is the main reason why the market price of spiral welded pipes is higher than that of straight seam welded pipes. For the composition of steel pipe sales prices, material prices are the dominant or even decisive factor. Upon careful examination of the price difference between spiral welded pipes and straight seam welded pipes, it is found that the slightly higher price of spiral welded pipes compared to straight seam welded pipes is due to the price difference of the main production materials.

　　Spiral welded steel pipes should undergo mechanical function tests, flattening tests, and expansion tests, and meet the requirements of standard regulations. Steel pipes should be able to withstand a certain internal pressure, and if necessary, a 2.5Mpa pressure test should be conducted to ensure no leakage for one minute. Answer: Use eddy current testing instead of hydrostatic testing. Eddy current testing shall be carried out in accordance with GB7735 "Inspection Method for Eddy Current Testing of Steel Pipes". The eddy current flaw detection method is to fix it on the frame, maintain a 3-5mm interval between the flaw detection and the weld seam, and rely on the active movement of the steel pipe to scan the entire weld seam. The flaw detection signal is automatically processed and sorted by the eddy current flaw detector to achieve the purpose of the flaw detection. The welded pipe after inspection is blocked with a flying saw according to the specified length, and then rolled down through a flipping frame. The two ends of the steel pipe should be chamfered with flat heads, and symbols should be printed. The products should be packaged with hexagonal ties before leaving the factory. The primary processing method for straight seam steel pipes is: casting steel: a pressure processing method that uses the reciprocating impact force of a forging hammer or the pressure of a press to change the billet into the shape and standard we need. Kneading: It is a processing method in which steel is placed in a sealed kneading die, and pressure is applied at one end to extrude the metal from a regular mold hole to obtain a product with the same shape and standard. It is commonly used in the production of non-ferrous metal materials such as steel. Rolling: A pressure processing method in which a steel metal billet is passed through a pair of rotating rollers (of various shapes) to reduce the cross-section and increase the length of the material due to the compression of the rollers. Pulling steel: It is a processing method that involves pulling and pulling rolled metal billets (shapes, tubes, products, etc.) through mold holes to reduce cross-section and increase length. It is mostly used for cold processing. The characteristics of spiral steel pipes include simple production technology, high production power, low cost, and fast opening. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. They can produce welded pipes with larger diameters using narrower billets, and can also produce welded pipes with different diameters using billets of the same width. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. They can produce welded pipes with larger diameters using narrower billets, and can also produce welded pipes with different diameters using billets of the same width. However, compared to straight seam pipes of the same length, the length of the weld seam increases and the production speed is lower. Therefore, most welded pipes use straight seam welding, while large-diameter welded pipes mostly use spiral welding.

　　The current situation of the steel industry ecosystem: 1. From the perspective of industry chain position: strong at both ends and weak in the middle. Unequal status and uneven interests. Steel mills occupy the leading position in the industrial chain, while end users occupy the leading position in the market. Circulation enterprises are a vulnerable group, seeking steel mills from above and terminals from below. They are constrained by upstream and downstream, with limited status and discourse power, which determines that they have little benefit in the distribution of benefits in the industrial chain and are difficult to guarantee. 2. From the perspective of service chain length: long in the middle and short at both ends. Steel circulation enterprises serve steel mills from top to bottom, with a longer service chain, more service links, a longer funding front, and greater risks. Although steel mills are also extending to service terminals, these terminals are relatively large, large-scale, and strong in strength. The terminals served by circulation enterprises are relatively small and diverse, with scattered and special service requirements, and high financial risks. 3. From the perspective of industrial concentration: high at both ends and low in the middle. The concentration of steel mills continues to increase, and Baowu Group will build a billion ton industrial cluster. Private steel mill leader Shagang Group is also constantly merging and restructuring. The concentration of steel circulation enterprises is relatively low, and the scattered, small, and chaotic situation will continue. Downstream demand is mainly focused on manufacturing and infrastructure construction, and the demand side is relatively concentrated. 4. From the perspective of industrial chain integration: state-owned enterprises are easier than private enterprises. Whether it is steel mills or circulation enterprises, the difficulty of integration or fusion between state-owned enterprises is relatively lower than that of private enterprises due to the absence of institutional differences. Private enterprises are limited by various factors such as ideology, geography, equity, capital, culture, products, and channels, making integration very difficult. Due to the significant differences in ideology, culture, thinking, and management between state-owned and private enterprises, the integration of mixed ownership is not so simple, and there are relatively few successful individuals.

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