Which scenarios make welded steel pipes more cost-effective? High cost-performance scenarios analysis
In the selection of steel pipes, welded steel pipes have become a cost-effective choice for many scenarios because of their advantages of low cost, high productivity and easy processing. Its core value lies in "the best cost based on performance adaptation", especially in the scene with low safety risk and conventional working conditions, the selection of welded steel pipes can greatly reduce the total project cost and meet the actual use requirements. Hebei Huayang Steel Pipe, as an enterprise with two kinds of steel pipe production capacity, has accumulated a large number of application cases of welded steel pipes in the fields of municipal infrastructure, general industrial transportation, building support and so on. Combining industry data and practical experience, this paper analyzes the more cost-effective core scenario of selecting welded steel pipes with a question-sentence subtitle system, clarifies the cost-effective boundary, and provides scientific guidance for engineering cost optimization.
Medium and low pressure conventional transport: Why are welded steel pipe more cost-effective?
The medium and low pressure conventional fluid transmission scene is the most cost-effective core field for selecting welded steel pipes. This kind of scenario has mild working conditions and loose requirements for pipe performance, and the basic performance of welded steel pipes can completely cover the demand, and the cost advantage is extremely significant. It is generally defined in the industry that in the scene of medium and low voltage below 8MPa and transmission of ordinary neutral medium, welded steel pipes are preferred to maximize the cost performance.
Municipal water supply and ordinary natural gas transportation are typical representatives. A municipal water supply project in a prefecture-level city needs 3,000 tons of steel, and the total cost of using Huayang ERW welded steel pipe (unit price of 5,200 RMB/ton) is about 15.6 million RMB. If seamless steel pipe with the same specification is used (unit price of 8,500 RMB/ton), the total cost will reach 25.5 million RMB, directly saving nearly 10 million RMB. The working pressure of the project is only 2.5MPa, and the transmission medium is clear water. After anti-corrosion treatment, the welded steel pipe runs stably for 5 years without any leakage, which fully meets the use requirements. Welded steel pipes are also widely used in ordinary natural gas residential pipelines (pressure ≤4MPa). The application of Huayang LSAW welded steel pipes in a long-distance natural gas branch line project saves more than 30% of the cost compared with seamless steel pipes, and has the advantages of convenient construction and low maintenance cost.
In addition, welding steel pipes are also suitable for cooling water and compressed air transportation in general industrial fields. Huayang thin-walled welded steel pipe is used for compressed air conveying pipeline in the workshop of a mechanical processing plant, which not only reduces the cost by 55% compared with seamless steel pipe, but also reduces the weight and improves the installation efficiency by 40%, fully meeting the working pressure requirement of 0.8MPa. The core requirement of this kind of scene is "completing medium transmission at low cost", and the cost-performance advantage of welded steel pipe is irreplaceable.
Large-scale infrastructure projects: Why do welded steel pipes control overall cost?
Large-scale infrastructure projects such as roads, railways and municipal pipe networks use a huge amount of steel, and total cost control is the core goal. At this time, the selection of welded steel pipes can further enlarge the cost performance through "batch advantage+low cost". The high-yield characteristics of welded steel pipes can guarantee the construction period of the project and greatly reduce the cost per ton, which has become the first choice for this kind of projects.
The steel consumption of a long-distance natural gas main pipeline project reached 45,000 tons. Huayang LSAW longitudinal submerged arc welded pipe was selected, which saved more than 80 million RMB compared with seamless steel pipe. The working pressure of the main line of the project is 4MPa, which belongs to the category of medium and low pressure, and the productivity advantage of welded steel pipes is particularly critical-the daily production capacity of a single line of Huayang welded steel pipe production line can reach 300 tons, which can quickly meet the large-scale supply demand and ensure the project to advance according to the construction period. If seamless steel pipe is selected, its production cycle per ton is more than three times that of welded steel pipe, which is difficult to match the large-scale supply requirements of the project.
Welded steel pipes are also widely used in urban underground utility tunnel projects. Huayang ERW welded steel pipes are used in water supply and drainage, communication protection sleeves and other links in a provincial capital city of utility tunnel, with a total steel consumption of 28,000 tons, which saves about 60 million RMB compared with seamless steel pipes. The core demand for pipes in this kind of projects is "adapting to normal working conditions+mass supply+low cost". Welded steel pipes fully meet these requirements and become the key to cost optimization of large-scale infrastructure
Construction support: Where are welding steel pipes cost-effective?
Scaffolding, water supply and drainage branch pipes, ventilation pipes and other supporting links of construction projects have low requirements on pipe performance and large consumption. The use of welded steel pipes can significantly reduce the construction cost and has the advantages of convenient installation and easy processing, so it is a cost-effective choice for this kind of scene.
Construction scaffolding is a classic application scenario for welding steel pipes. In the construction project of a large residential district, Huayang welded steel pipe is selected as scaffold material, which saves more than 65% of the cost compared with seamless steel pipe. Welding and cutting of welded steel pipes are convenient, and the length can be flexibly adjusted according to the building size, and the strength can fully meet the bearing requirements of scaffolding. The person in charge of the project said that the use of welded steel pipes for scaffolding alone saved nearly 2 million RMB in cost.
Welded steel pipes are also suitable for indoor water supply and drainage branches and ventilation pipes. The working pressure of this kind of link is usually less than 1 MPa, and the transmission medium is water or air. The welded steel pipe can meet the use requirements after simple anticorrosion treatment. In the water supply and drainage project of an office building, Huayang thin-walled welded steel pipe is selected, which saves 50% of the cost compared with seamless steel pipe, and has higher installation efficiency and convenient later maintenance, which fully meets the use requirements of building facilities.
Temporary and auxiliary facilities: Why is welded steel pipe preferred?
Temporary facilities in engineering construction, auxiliary pipelines in industrial production and other scenarios have short service life and low performance requirements. Welding steel pipe is the most cost-effective choice because it can complete functional adaptation at the lowest cost. This kind of scenario does not need to pursue the excess performance of seamless steel pipe, and the low cost characteristics of welded steel pipe can realize the optimal allocation of resources.
Welded steel pipes are widely used in temporary water supply and power supply protection sleeves in construction and temporary ventilation pipes in mining. The temporary ventilation system of a mine capital construction project was built with Huayang welded steel pipe, with the total cost being only 35% of that of seamless steel pipe, and the construction period being shortened by 40%, which fully met the ventilation demand during the construction period of the project. After the project is completed, the welded steel pipe can be recycled, further reducing the comprehensive cost.
Welded steel pipes are also suitable for auxiliary drainage and dust removal branches in industrial plants. This kind of pipeline does not involve the core production process, with mild working conditions, low cost and easy processing characteristics of welded steel pipes, which can minimize the construction and operation costs of the factory under the premise of meeting the basic functions.
Conclusion: The core logic of cost-effective selection is "performance adaptation+cost optimization"
To sum up, it is more cost-effective to choose welded steel pipes for medium and low voltage conventional transmission, large-scale infrastructure projects, building supporting links, temporary and auxiliary facilities and other scenarios. The core logic is that the working conditions of these scenarios are conventional and the safety risk is low, the basic performance of welded steel pipes can be fully adapted, and its advantages of low cost, high productivity and easy processing can be fully exerted to optimize the total cost of the project.
The practice of Hebei Huayang steel pipe proves that the cost-effective selection of welded steel pipe is not "sacrificing performance for cost", but "precise adaptation to reduce cost". Engineering practitioners need to accurately judge the boundary of the scene to avoid potential safety hazards caused by blind selection of welded steel pipes in harsh working conditions, and there is no need to waste excessive performance of seamless steel pipes in conventional scenes. In the future, with the upgrading of welding technology, the performance of welded steel pipes will be further improved, and its cost-effective advantage scenarios will continue to expand, providing support for cost optimization in more fields.
