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2025-07-22

How to maintain and prevent corrosion of welded steel pipes

Since the 1930s, with the rapid development of high-quality strip steel continuous rolling production and the advancement of welding and inspection technology, the quality of welds has been continuously improved, the varieties and specifications of welded steel pipes have increased, and they have replaced seamless steel pipes in more and more fields. Welded steel pipes are divided into straight welded pipes and spiral welded pipes according to the form of welds.

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2025-07-21

How to choose stainless steel seamless pipe and welded pipe?

How to choose seamless stainless steel pipes and welded pipes Seamless steel pipes are much higher than welded pipes in terms of corrosion resistance, pressure resistance and high temperature resistance. With the improvement of welded pipe manufacturing technology, its mechanical properties and mechanical properties are gradually approaching seamless pipes. The production process of seamless pipes is relatively complicated, and its price is more expensive than welded pipes. According to the characteristics and differences of stainless steel seamless pipes and welded pipes, reasonable selection should be made in the application to achieve economic, beautiful and reliable effects:

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2025-07-21

Detailed explanation of 304 stainless steel pipe wall thickness standard

304 stainless steel pipe is a high-quality stainless steel pipe widely used in construction, machinery, chemical industry, power and other fields. It is favored by the market for its good corrosion resistance and processing performance. With the refined development of industry applications, users have put forward higher requirements for the wall thickness standard of 304 stainless steel pipe. This article will systematically explain the wall thickness definition, common standard range, detection method, quality control measures and its impact on price and use of 304 stainless steel pipe, helping you make more scientific judgments in the procurement and application process.

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2025-07-18

Characteristics of MS pipe

Mild Steel (MS) Pipe is manufactured using low carbon steel (less than 0.25%). Due to the low carbon content, the steel pipe does not harden and is easy to work with. Since mild steel pipe is made of low carbon steel, it can be easily welded and formed into pipes and tubes of various shapes and sizes. These pipes are mainly used in industries and engineering applications where corrosive fluids are used. In addition, MS pipes are also used in drinking water supply, i.e., pipes, fire protection, and HVAC (heating, ventilation, and air conditioning). Mild steel does not corrode because its surface is coated with paint, varnish, and other metals, which makes it durable and can work in very harsh conditions. In addition, mild steel pipes can also withstand certain temperatures.

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2025-07-18

Hardness testing method for seamless steel pipe

Seamless steel pipes are generally measured by three hardness indicators: Brinell, Rockwell and Vickers.

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2025-07-17

What is a thin-walled seamless carbon steel pipe?

Steel pipes with a ratio of outer diameter to wall thickness greater than 20 are called thin-walled seamless steel pipes. Thin-walled seamless steel pipes are all made by cold drawing. The process standard for thin-walled seamless steel pipes is applicable to general industrial and civil construction projects and the steel pipes for lighting and power wiring below, concealed laying, and steel pipe laying and installation projects in suspended ceilings and wall panels.

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2025-07-17

ASTM A105 Forged Butt Weld Flange Advantages

ASTM A105 is a carbon steel forging standard developed by the American Society for Testing and Materials (ASTM), specifically for the manufacture of pipeline components. As a special steel, it belongs to the category of cold forged steel and is essentially a low-carbon steel forging with strict standard control of its chemical composition and mechanical properties. In terms of chemical composition, A105 material contains carbon (C) ≤ 0.35%, silicon (Si) ≤ 0.35%, manganese (Mn) 0.6-1.05%, sulfur (S) ≤ 0.050%, phosphorus (P) ≤ 0.040%, and limited content of copper, nickel, chromium, molybdenum and other elements. This precise composition ratio ensures that the material has good machinability while also having sufficient strength and toughness.

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2025-07-16

What is the strength of a general carbon steel seamless pipe?

Carbon steel seamless pipes are essential components in a wide range of industries, including oil and gas, chemical processing, construction, and energy infrastructure. Their mechanical strength is a critical factor that directly influences safety, performance, and service life. Understanding how strong these pipes are—what determines their strength, how it is measured, and how it varies by material and application—is vital for engineers, procurement professionals, and project designers.

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2025-07-16

Why EN 10219-3 Matters for Your Steel Procurement ?

In modern structural engineering, mechanical manufacturing, and infrastructure development, cold-formed welded structural hollow sections are widely used due to their lightweight strength, precise forming, and excellent bending resistance. As a key technical specification for the European single market, the EN 10219 standard series serves as the cornerstone for evaluating the performance, quality, and application suitability of these steel products.

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2025-07-15

Key Factors Influencing Pup Joint Prices

In oil and gas drilling operations, Pup Joints are important components that connect drill pipes, casings or other downhole tools. Their price and cost structure directly affect the economic benefits of the entire drilling project. This article will deeply explore the factors affecting the market price of Pup Joints, the cost structure, the cost optimization effect of technological innovation, and future price trends, providing industry practitioners with a comprehensive purchase and use reference.

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2025-07-15

EN10219 Square Hollow Section(SHS) Sizes and Material Grades

EN 10219 is an important standard for cold-formed welded structural hollow profiles developed by the European Committee for Standardization (CEN), which specifically regulates the technical requirements and production specifications for square, rectangular and round steel tubes. As a steel product widely used in the fields of construction and machinery manufacturing, square tubes (square hollow profiles) under the EN 10219 standard occupy an important position in the global steel structure market due to their precise dimensional tolerances, excellent mechanical properties and high cost performance.

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2025-07-14

ASME B16.9 Stainless Steel Concentric Reducer Size Table

Stainless steel butt-weld reducers, also known as stainless steel reducers, are a special type of stainless steel pipe fittings, mainly used to connect two pipes of different diameters. According to different structures, they can be divided into stainless steel concentric reducers and stainless steel eccentric reducers. Stainless steel concentric reducers refer to reducers where the centers of the two diameters are on the same center, which is suitable for controlling the flow rate of fluids and suitable for laying pipelines against walls or on the ground without taking up space. Stainless steel eccentric reducers refer to reducers where the centers of the diameters are not on the same center, and can be divided into two types: top flat and bottom flat. Top flat eccentric reducers are used to prevent gases with lower density from gathering upward and flowing out of the pipeline, while bottom flat eccentric stainless steel reducers are used to prevent fluids with impurities or accumulated liquid from sinking and blocking the pipeline.