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ASTM A672 standard specification for electric fusion welded steel pipe for high pressure service at moderate temperatures.
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ASTM A252 standard specification for welded steel pipe piles.
This specification covers nominal wall cylindrical steel pipe piles in which the steel cylinder acts as a permanent load-carrying member or as a shell to form cast-in-place concrete piles. Each welded pile shall be made by seamless, electric resistance welding, flash welding or fusion welding with longitudinal, helical-butt, or helical-lap seams.
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ASTM A135 is for electric-resistance-welded steel pipe intended for conveying gas, vapor, water or other liquid.
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The production process of welded steel pipes involves forming steel sheets or strips into the desired cross-sectional shape using straight press rolls or helical methods, and then welding them together using heat, pressure, or other methods. As a result, defects in welded steel pipes can be categorized into two main types: base material defects and weld defects.
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Large-diameter straight seam submerged arc welded (LSAW) pipes are widely favored for major oil and gas pipeline projects globally due to their thick walls, high-quality materials, and stable processing. The weld seams and heat-affected zones of these pipes are particularly prone to various defects. This article outlines key welding quality control measures for LSAW pipes to mitigate these issues.
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Square steel pipe refers to a steel pipe with a square or rectangular cross-section. It can be divided into many types according to different manufacturing processes and materials. Common square tube steels include hot-rolled square tubes, cold-rolled square tubes, galvanized square tubes, etc. These different types of square tube steel have different physical properties and uses, but all offer excellent strength and corrosion resistance.
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Quality control and testing are crucial aspects of ensuring the reliability and performance of welded pipes in various industries. From manufacturing to installation, a rigorous quality control process helps identify any defects or inconsistencies in welded pipes, preventing potential failures and ensuring compliance with industry standards. In this article, we will explore the importance of quality control and testing in the production of welded pipes, highlighting key methods, standards, and procedures used in the industry.
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The purpose of this specification is to provide a guide for the production of transport pipes. Products made under API 5L optics carry gas, oil, and water in the natural gas and oil industry.
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Welded steel DN300 is generally divided into two types straight welded black pipe and spiral welded black pipe. Using spiral coil technology and high-frequency welding to create the most durable steel pipe products.
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ASTMA252Gr3 spiral steel pipe is one of the commonly used types of steel pipe, such steel pipe has a wide range of applications, the understanding and mastery of its relevant parameters for engineering design and construction is crucial.
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The quality of welded pipes (SSAW/LSAW/ERW) is significantly influenced by the welding seam, which is considered the lifeline of these pipes. As such, it is imperative to conduct a comprehensive analysis and address quality defects related to the welded section.
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SSAW (Spiral Submerged Arc Welded) steel pipes are commonly used in various applications, and their surface treatment is essential to enhance durability, corrosion resistance, and overall performance. Here are some common surface treatments for SSAW steel pipes.
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ERW (Electric Resistance Welded) steel pipes are made from steel coils or steel plates and the weld seam runs parallel to the pipe. They are commonly applied to transport oil, natural gas and other vapor-liquid objects, and can meet various requirements of high and low pressure. This article will introduce in detail the quality evaluation process of ERW steel pipes. Read on to learn more.
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When welded steel pipe is manufactured, a steel plate or strip is bent and subsequently welded into either a circular, traditional pipe shape or a square shape, resulting in a seam on its body. Today, we will introduce in detail GB standards for welded steel pipes.
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Double-sided submerged arc welding straight seam steel pipe (LSAW) production process
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Welded pipes are divided into spiral welded pipes and longitudinally welded steel pipes according to the forming process, and high-frequency resistance welding and submerged arc welding according to the welding process. Spiral welded pipes all adopt submerged arc welding process. For longitudinally welded pipes, submerged arc welded pipes are referred to as UOE, and longitudinal high-frequency resistance welding is referred to as ERW.
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Welded pipe: the specification is in the form of seamless pipe, welded steel pipe expressed by outer diameter * wall thickness in millimeters, and metric welded pipe is welded with ordinary carbon steel, high-quality carbon steel or general energy low-alloy steel in the hot zone, cold zone, or hot zone Cold drawing method after welding
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Welded steel pipe weight
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Advantages and disadvantages of spiral steel pipe
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Size specification of large diameter electric welded steel pipe
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API SPEC 5L-2007 (line pipe specification), compiled and issued by the American Petroleum Institute, is commonly used all over the world,Line pipe standard:API SPEC 5L-American Petroleum Institute Standard; GB/T9711-China National Standard。