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ASME BPVC セクション II パート A: 鉄鋼材料仕様

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Introduction ASME BPVC Section II Part A: Ferrous Material Specifications is a section of the ASME Boiler and Pressure Vessel Code (BPVC) that covers specifications for ferrous materials (primarily iron) used in the construction of boilers, pressure vessels and other pressure-retaining equipment. This section specifically addresses the requirements for steel and iron materials, including carbon steel, alloy steel, and stainless steel. Related Material Specifications for Tubes & Plates Tubes: SA-178/SA-178M – Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes SA-179/SA-179M – Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes SA-192/SA-192M – Seamless Carbon Steel Boiler Tubes for High-Pressure Service SA-209/SA-209M – Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes […]

焼入れSAE4140シームレス鋼管のリング状亀裂の原因分析

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The reason for the ring-shaped crack at the pipe end of the SAE 4140 seamless steel pipe was studied by chemical composition exam, hardness test, metallographic observation, scanning electron microscope, and energy spectrum analysis. The results show that the ring-shaped crack of SAE 4140 seamless steel pipe is a quenching crack, generally occurring at the pipe’s end. The reason for the quenching crack is the different cooling rates between the inside and outside walls, and the outside wall cooling rate is much higher than that of the inside wall, which results in cracking failure caused by stress concentration near the inside wall position. The ring -shape crack can be eliminated by […]

ASME SA213 T91: どれくらい知っていますか?

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Background & Introduction ASME SA213 T91, the steel number in the ASME SA213/SA213M standard, belongs to the improved 9Cr-1Mo steel, which was developed from the 1970s to the 1980s by the U.S. Rubber Ridge National Laboratory and the Metallurgical Materials Laboratory of the U.S. Combustion Engineering Corporation in cooperation. Developed based on the earlier 9Cr-1Mo steel, used in nuclear power (can also be used in other areas) high-temperature pressurized parts materials, is the third generation of hot-strength steel products; its main feature is to reduce the carbon content, in the limitation of the upper and lower limits of the carbon content, and more stringent control of the content of residual […]

NACE MR0175/ISO 15156 と NACE MR0103/ISO 17495-1 の比較

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Introduction In the oil and gas industry, particularly in onshore and offshore environments, ensuring the longevity and reliability of materials exposed to aggressive conditions is paramount. This is where standards like NACE MR0175/ISO 15156 vs NACE MR0103/ISO 17495-1 come into play. Both standards provide critical guidance for material selection in sour service environments. However, understanding the differences between them is essential for selecting the right materials for your operations. In this blog post, we will explore the key differences between NACE MR0175/ISO 15156 vs NACE MR0103/ISO 17495-1, and offer practical advice for oil and gas professionals navigating these standards. We will also discuss the specific applications, challenges, and solutions these […]

ボイラーおよび熱交換器: シームレスチューブ選択ガイド

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Introduction In industries such as power generation, oil and gas, petrochemicals, and refineries, seamless tubes are essential components, especially in equipment that must withstand extreme temperatures, high pressures, and harsh, corrosive environments.  Boilers, heat exchangers, condensers, superheaters, air preheaters, and economizers use these tubes. Each of these applications demands specific material properties to ensure performance, safety, and longevity. The selection of seamless tubes for the boiler and heat exchanger depends on the specific temperature, pressure, corrosion resistance, and mechanical strength. This guide provides an in-depth look into the various materials used for seamless tubes, including carbon steel, alloy steel, stainless steel, titanium alloys, nickel-based alloys, copper alloys, and zirconium alloys. We […]

材料の選び方: 材料選択ガイドライン

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Introduction Material selection is a critical step in ensuring the reliability, safety, and performance of equipment across industries such as oil and gas, chemical processing, marine engineering, aerospace, and many more. The right material can prevent corrosion, withstand extreme temperatures, and maintain mechanical integrity in harsh environments. Steels and alloys such as carbon steels, alloy steels, stainless steels, nickel, titanium, and various high-performance superalloys like Inconel, Monel, and Hastelloy offer specific advantages that make them ideal for these demanding applications. This blog provides a comprehensive overview of material selection guidelines, focusing on key materials and their suitability based on corrosion resistance, mechanical properties, and temperature capabilities. By understanding these properties, […]