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Jun 25, 2025Innovation and technological development of straight seam welded pipesWhat is the application prospect of laser welding in the production of straight seam welded pipes? Laser welding can achieve high-precision docking at the 0.1mm level, and the widt -
Jun 25, 2025Installation and maintenance of straight seam welded pipesWhat are the precautions for field welding of straight seam welded pipes? For field welding, weather conditions should be checked in advance to avoid working in rainy days or high -
Jun 25, 2025Quality control and testing of straight seam welded pipesWhat are the operating standards and procedures for ultrasonic testing (UT)? UT testing is based on GB/T 5777 standard, using a 5MHz probe to scan the weld and heat-affected zone. -
Jun 25, 2025Application fields of straight seam welded pipesWhat are the specifications for straight seam welded pipes for oil and gas transportation? Oil and gas pipelines usually use API 5L standard X series steel (such as X65/X70), requi -
Jun 25, 2025Materials and properties of straight seam welded pipesCommon steel grades and their applicable scenarios? Q235B is used for low-pressure fluid transportation, L245 (API 5L) is suitable for oil and gas pipelines, and X70/X80 is used fo -
Jun 25, 2025Production process of straight seam welded pipeWhat is the main production process of straight seam welded pipe? The production of straight seam welded pipe begins with uncoiling of steel coils, eliminating curling stress throu
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Jun 25, 2025What material en 101521. **EN 10297:** * **Material:** Seamless circular steel tubes made from **non-alloy and alloy steel**. * **Primary Use:** For mechanical and general engineering purposes. Common a -
Jun 25, 2025What material EN 135991. **What material is EN 10259?** * **EN 10259** specifies the technical delivery conditions for **cold drawn non-alloy and alloy steel wire** primarily intended for the manufactur -
Jun 25, 2025EN 10269 Material1. **EN 10269 Material:** This European Standard specifies requirements for **steels and nickel alloys for fasteners** (like bolts, nuts, screws) with specified elevated and/or low -
Jun 25, 2025S355J2 steel equivalent to1. **What is steel S355J2 equivalent to?** S355J2 is closely equivalent to **ASTM A572 Grade 50** (structural steel) or **ASTM A529 Grade 50**, but note that *exact* equivalents do
