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Main Purpose of Low Temperature Seamless Steel Pipe
Low-temperature seamless steel pipes are mainly used to transport fluids in low-temperature environments, such as liquid natural gas (LNG), liquid nitrogen, liquid argon, etc. These pipes have important applications in the fields of industry, energy, and chemicals, because under low temperature conditions, some conventional steel materials may become brittle, and low-temperature seamless steel pipes have better low-temperature resistance, which can ensure that the pipelines survive extreme low temperatures. safe operation in the environment. The following are the main uses of low temperature seamless steel pipes.
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ERW and LSAW Steel Pipe Welding Processes Comparison
ERW (Electric Resistance Welded) and LSAW (Longitudinal Submerged Arc Welding) are two common steel pipe welding processes, and they have different characteristics in pipeline manufacturing. The following is a comparison of ERW and LSAW steel pipe welding processes.
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Common Connection Methods of Carbon Steel Pipes
The connection method of carbon steel pipes mainly depends on factors such as the specific application of the pipe, working environment, pipe diameter and pressure. The following are some common connection methods for carbon steel pipes.
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IPN8710 Anticorrosive Spiral Steel Pipe
The 8710 anticorrosive spiral steel pipe (SSAW steel pipe) involves applying a liquid epoxy coating, IPN8710 anticorrosion, to the inner wall of the spiral pipe. This coating, composed of polyurethane prepolymer, epoxy resin, and other components, is commonly utilized for daily drinking water and food transportation due to its corrosion resistance, hydrolysis resistance, and other advantageous properties. This article will talk about anticorrosive spiral steel pipe.
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Raw Materials of SSAW Steel Pipe
The raw materials used in the manufacturing of Submerged Arc Welded (SAW) steel pipes, including Spiral Submerged Arc Welded (SSAW) steel pipes, typically consist of the following.
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Difference Between Long Radius Elbow And Short Radius Elbow
Elbows are categorized based on their curvature radius, distinguishing between long radius elbows and short radius elbows. A long radius elbow has a curvature radius equivalent to 1.5 times the outer diameter of the pipe, denoted as R=1.5D. Conversely, a short radius elbow features a curvature radius equal to the outer diameter of the pipe, expressed as R=D. Here, D represents the diameter of the elbow, and R denotes the curvature radius. In this article, Union Steel Industry will introduce you to the main differences between long and short radius elbows.
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Non Destructive Testing of LSAW Steel Pipe
Non-destructive testing (NDT) is crucial for ensuring the quality and integrity of Longitudinally Submerged Arc Welded (LSAW) steel pipes. Various NDT methods are employed to detect and evaluate defects without causing any harm to the material being tested. Here are some common non-destructive testing methods used for LSAW steel pipes.
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How To Prevent Gap Corrosion of Stainless Steel Pipe?
Due to the gaps in the equipment and component structures or the presence of metal or non-metallic deposits on the surface of stainless steel pipes, gaps are formed between the deposits and the surface of the stainless steel pipes. Under the action of corrosive media, punctate and ulcerative damage will appear before the crevice, which is crevice corrosion. In the presence of water media such as Cl-, due to the acidification of the medium solution in the gap (increased Cl- concentration, decreased pH value) and lack of oxygen (oxygen concentration difference battery, lack of oxygen in the gap).
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Annealing Process of Stainless Seamless Steel Pipe
The annealing process of stainless steel seamless steel pipes is a heat treatment process designed to improve the mechanical properties, grain structure and corrosion resistance of the steel pipes. Annealing relieves stress, increases the steel's workability, and improves the balance of hardness, strength, and toughness. This article will introduce in detail the annealing process of stainless steel seamless steel pipes.
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ASTM A312 Steel Pipe Size Tolerance
ASTM A312 is a standard specification for seamless, welded, and heavily cold worked austenitic stainless steel pipes used in high-temperature and general corrosive service. This specification covers a wide range of pipe sizes and dimensions, and it includes specific size tolerances to ensure the pipes meet the required standards. The size tolerances for ASTM A312 steel pipes are typically outlined as follows.
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