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知っておくべきことすべて: パイプライン溶接における熱影響部

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Introduction In pipeline welding, the integrity of welded joints is crucial to ensuring the long-term safety, durability, and efficiency of the pipeline infrastructure. One critical aspect of this process that is often overlooked is the Heat-Affected Zone (HAZ)—the area of the base metal that is altered due to the heat applied during welding. While the HAZ doesn’t melt during the process, the heat can still change the microstructure of the material, impacting its mechanical properties and performance. This blog aims to offer a deep understanding of the Heat-Affected Zone, including what it is, why it matters in pipeline welding, and how to mitigate its potential negative impacts. Our goal is […]

プロジェクトに適したものを選ぶ方法: 溶接電極

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Introduction Welding is a critical process in many industries, especially in the fabrication and joining of metal materials like steel pipes, plates, fittings, flanges, and valves. The success of any welding operation depends heavily on choosing the right welding electrodes. Selecting the appropriate electrode ensures strong, durable welds and reduces the risk of defects, which can compromise the integrity of the welded structure. This guideline aims to provide a comprehensive overview of the Welding Electrodes, offering valuable insights and solutions for common user concerns. Understanding Welding Electrodes Welding electrodes, often referred to as welding rods, serve as the filler material used in joining metals. Electrodes are classified into two categories: […]

適切なコーティングの選択: 3LPE コーティングと FBE コーティング

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Introduction In the oil, gas, and water transmission industries, pipeline coatings play a crucial role in ensuring the long-term performance and protection of buried or submerged pipelines. Among the most widely used protective coatings are 3LPE (Three-Layer Polyethylene Coating) and FBE (Fusion Bonded Epoxy Coating). Both provide corrosion resistance and mechanical protection, but they offer distinct advantages depending on the application environment. Understanding their differences is essential for making an informed decision in pipeline coating selection. 3LPE coating vs FBE coating, let’s explore in-depth. 1. Overview of 3LPE Coating vs FBE Coating 3LPE Coating (Three-Layer Polyethylene Coating) 3LPE is a multi-layered protective system that combines different materials to create an […]

知っておくべきことすべて: ラインパイプの API 5L 仕様

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Overview of API 5L Specification for Line Pipe The API 5L standard, published by the American Petroleum Institute (API), specifies requirements for the manufacturing of two types of steel pipes: seamless and welded, primarily used for pipelines transporting oil, gas, water, and other fluids in the oil and gas industry. The standard covers pipes for both onshore and offshore pipeline applications. API 5L Specification for Line Pipe is widely adopted for its rigorous quality controls and testing standards, which ensure the pipes meet safety, performance, and durability requirements in a range of operational environments. Product Specification Levels (PSL) in API 5L Specification for Line Pipe API 5L defines two distinct […]

ASTM A671 低温炭素鋼管: 総合ガイド

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Introduction In the demanding oil and gas industry, material selection is critical to ensure piping systems’ long-term durability and performance. ASTM A671 low-temp carbon steel pipe is a trusted standard in this field, especially in environments where the combination of low temperatures, high pressures, and corrosive conditions can be challenging. This blog provides a detailed overview of ASTM A671, addressing its properties, applications, manufacturing process, and how it provides solutions for everyday challenges in the oil and gas industry. What is ASTM A671 Low-Temp Carbon Steel Pipe? ASTM A671 is a specification that covers electric-fusion-welded steel pipes using pressure vessel-quality plates. These pipes are designed for use in low-temperature environments, […]

知っておくべきことすべて: ASTM A691 炭素鋼および合金鋼パイプ

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Introduction In the oil and gas industry, selecting the right materials for high-pressure piping systems is critical to ensure safety, longevity, and performance. Major players in the oil and gas sector favor ASTM A691 Carbon and Alloy Steel Pipes, particularly those designed for high-pressure service in harsh and demanding environments. This guide will explore the features, manufacturing process, grades, applications, and common concerns regarding ASTM A691 pipes, providing valuable insights for professionals working in the oil and gas sector. What are ASTM A691 Carbon and Alloy Steel Pipes? ASTM A691 is a specification for electric-fusion-welded carbon and alloy steel pipes designed for high-pressure service at elevated temperatures. Manufacturers use pressure vessel-quality […]