Price of internal and external anti-corrosion steel pipes for buried water supply

Description :

　　The company provides spiral steel pipes with diameters ranging from 219mm to 3820mm and wall thicknesses ranging from 5mm to 25mm. Materials such as Q235B and Q345B can be used to produce welded steel pipes of various specifications, materials, and shapes according to your requirements. Large diameter thick walled coiled pipes with a diameter of 400mm can produce welded steel pipes with a diameter of 3 meters and a thickness of 100mm, meeting your various needs. Satisfying you is our company's unremitting pursuit! Spiral steel pipes are widely used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction, and are one of the twenty key products developed in China. Specifically applicable to water supply and drainage. Used for gas transportation: coal gas, steam, liquefied petroleum gas. Used for structural purposes: as pile driving pipes, as bridges; In the fields of docks, roads, and building structures, pipes are used. Hebei Jiangyang Pipeline Co., Ltd. is a manufacturer of large-diameter spiral steel pipes in Hebei Province. Q235B large-diameter spiral steel pipes are widely used, including spiral steel pipes for tap water construction, tap water engineering, drinking water engineering, Q235B spiral steel pipes, Q235B spiral steel pipes for drinking water, anti-corrosion spiral steel pipes for natural gas pipelines, and anti-corrosion spiral steel pipes for drinking water. Our factory has a large number of pipes all year round.

　　At present, market sentiment is still largely influenced by futures and steel billets, and it is expected that the market will mainly adopt a wait-and-see approach after the holiday. In terms of transactions, merchants have provided feedback that the market is still acceptable, but the off-season effect has gradually shifted towards the production end. The pressure on Hebei spiral tube manufacturers is quite obvious. In the short term, local market prices may remain stable and weaken. Our company is a manufacturer of large-diameter spiral steel pipes, with a complete range of specifications and models. We produce large-diameter thick walled spiral steel pipes, drainage spiral steel pipes, small-diameter spiral steel pipes, large-diameter spiral steel pipes for water engineering, and large-diameter spiral steel pipes for steam. Our company has seven Lincoln automatic double wire and double-sided submerged arc welded spiral pipe production lines imported from the United States, with an annual production capacity of φ 219- φ 3500mm and a wall thickness of 5mm-25mm. We have a large number of them all year round Spiral welded pipe manufacturers should hold an issued industrial product production license. The license system requires manufacturers of spiral welded pipes to first pass the review and assessment of recognized inspection institutions, and have the corresponding production methods and inspection equipment. Spiral steel pipes adopt special welding technology, which can achieve welding at the * welding position without any errors or defects, ensuring the qualification and quality of the spiral steel pipe. 2. During the forming process of large-diameter dredging spiral steel pipes, the steel plate should deform evenly, residual stress should be small, and the surface should not be scratched.

　　The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. It 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 weld seam length increases by 30~and the production speed is lower. Therefore, smaller diameter welded pipes mostly use straight seam welding, while large-diameter welded pipes mostly use spiral welded pipes. 1. Pressure bearing fluid transportation, using spiral seam submerged arc welded steel pipes, mainly used for pipelines transporting oil and natural gas; Spiral seam high-frequency welded steel pipes for pressurized fluid transportation, welded by high-frequency lap welding method, used for spiral seam high-frequency welded steel pipes for pressurized fluid transportation. Steel pipes have strong pressure bearing capacity, good plasticity, and are easy to weld and process into shapes; Spiral seam submerged arc welded steel pipes for general low-pressure fluid transportation are made using double-sided automatic submerged arc welding or single-sided welding methods, and are used for general low-pressure fluid transportation such as water, gas, air, and steam.

　　And it must meet the requirements specified by the standards. The quality inspection method is as follows: judging from the surface, that is, inspecting the appearance. The appearance inspection of welded joints is a simple and widely used inspection method, which is an important part of finished product inspection, mainly to discover defects and dimensional deviations on the surface of the weld seam. Generally, inspection is carried out through visual observation, using tools such as standard templates, gauges, and magnifying glasses. If there are defects on the surface of the weld seam, there is a possibility of defects inside the weld seam. The verification of physical methods: The verification method of physics is a method that uses some physical phenomena to determine or verify. The inspection of internal defects in materials or workpieces is generally carried out using non-destructive testing methods. Non destructive testing includes ultrasonic testing, radiographic testing, penetrant testing, magnetic testing, etc. Strength testing of pressure vessels: In addition to conducting sealing tests, pressure vessels also need to undergo strength tests. There are two common types: hydrostatic test and pneumatic test. They can all test the weld density of containers and pipelines working under pressure. Old coatings can sometimes be used as a post-treatment after sandblasting and rust removal. Although chemical cleaning can achieve a certain degree of cleanliness and roughness on the surface, its anchor pattern is shallow. After cutting into single steel pipes, each batch of three steel pipe heads must undergo strict initial inspection to check the mechanical function, chemical composition, dissolution condition, surface quality of the steel pipe, and undergo non-destructive testing inspection.

　　The commonly used standards for spiral steel pipes nowadays are generally divided into (departmental standard, also known as spiral seam submerged arc welded steel pipes for ordinary fluid transportation pipelines), (national standard, also known as technical delivery conditions for oil and gas industry transportation steel pipes Part 1: A-grade steel pipes (currently, GB/T9711.2B grade steel pipes have strict requirements), API-5L (American Petroleum Institute, also known as pipeline steel pipes); It is divided into two levels: PSL1 and PSL2, and (spiral welded steel pipes for piles). The standard set by the Ministry of Petroleum is generally referred to as the national standard spiral pipe, which is used for transporting steel pipes in the petroleum and natural gas industry. The A-grade spiral seam high-frequency welded steel pipe for general low-pressure fluid transportation is made of hot-rolled steel strip coil as the pipe blank, formed by constant temperature spiral, and welded using high-frequency lap welding method for spiral seam high-frequency welded steel pipes for general low-pressure fluid transportation. Spiral welded steel pipes for piles are made of hot-rolled steel strip coils as billets, which are formed by constant temperature spiral welding. They are made by double-sided submerged arc welding or high-frequency welding and are used as steel pipes for foundation piles in civil engineering and construction structures, docks, bridges, etc.

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• Internal and external anti-corrosion steel pipes