First of all, it may be due to the stress of the spiral seam submerged arc welded steel pipe. That is, the residual stress and welding stress after the steel pipe is formed.Secondly due to the presence of hydrogen. If the flux is not dried enough, the preheating temperature is insufficient or the pr
Line pipe has the advantages of high-temperature resistance and reduced loss, and the pipe is generally very strong and durable. Because of such powerful advantages, line pipes are widely used in oil transportation, the transportation of various gases, and liquefied gas. In addition to being used in
The performance and function of the original color straight seam steel pipe in the specific use process, the fully demonstrated operational contribution, and the resulting use performance. After painting, the straight seam steel pipe is also very energetic and beautiful when it is sprayed with white
Hydrostatic test of oil casing is an essential link in the steel pipe manufacturing process and an important means to test the overall quality of oil steel pipes. In simple terms, it is a test in which the pipe is filled with water and tested under pressure to maintain the specified pressure without
In pipeline manufacturing, Steel flanges are mainly used for the link of pipelines. In the pipelines that need to link, Various devices include a flange. deficient-Pressure pipelines can use wire flanges and welding flanges with pressures greater than 4 kg. Add sealing points within the two flanges,
The seamless steel elbow has the following advantages: hygienic and non-toxic, light in weight, good heat resistance, good corrosion resistance, good heat preservation, good impact resistance and long service life1. Hygienic and non-toxic: the material is completely composed of carbon and hydrogen,
The specification of the connection method of galvanized steel pipe depends on the type of connection method. Generally, there are several types, such as flange connection, clamp groove connection, and welding. In the actual connection of galvanized steel pipes, welding is the most commonly used con
The cast steel flange has an accurate blank shape and size, a small processing amount, and low cost, but has casting defects (pores, cracks, inclusions); the internal structure of the casting is poorly streamlined (if it is a cutting part, the streamlined form is even worse);Forged steel flanges gen
The steel concentric reducer is its connection form, which is directly butt-welded with the reducer and the steel pipe, and the steel is hot-pressed or forged. Classification: pushing, pressing, forging, casting. Corresponding to the steel concentric reducer, there are also eccentric reducers, and t
1. IPN8710 anti-corrosion steel pipe: When there are many kinds of corrosive media in the steel pipe, such as acid, alkali, salt, oxidant, and water vapor, the coating must be chemically inert, resistant to acid, alkali, and salt corrosion, and the coating film should have a dense structure and wate
