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May 20, 2025Welded Pipe BasicsWhat are welded pipes, and how are they made? Welded pipes are metal tubes formed by bending and welding steel plates or coils. The process involves shaping flat steel into a cylin -
May 19, 2025Material properties of steel pipes**1. Property of S355 Material** S355 is a European standard **structural steel** with good weldability and toughness. Key properties: - **Yield Strength**: ≥355 MPa (hence &quo -
May 19, 2025EN 10025 S235JR steel pipe1. **What is EN 10025 S235JR equivalent to?** EN 10025 S235JR is roughly equivalent to ASTM A36 in terms of mechanical properties. However, there are differences in chemical compos -
May 19, 2025EN 10025 specification**1. What is EN 10025 specification?** EN 10025 is a European standard specifying the technical delivery conditions for hot-rolled structural steel products, including beams, colum -
May 19, 2025EN 10025 S355 and S275**1. What is the tensile strength of S355J2H?** The tensile strength of **S355J2H** (a hollow structural section grade per EN 10210) is **470–630 MPa**, with a minimum yield -
May 19, 2025S355J2H steel knowledge**1. What material grade is S355J2H?** S355J2H is a **non-alloy structural steel grade** specified in the European standard **EN 10210**. The "S" denotes structural steel -
May 19, 2025EN 10219 steel pipe**1. What is EN 10219 material?** EN 10219 is a European standard for **cold-formed welded structural hollow sections** made from non-alloy and fine-grain steels. It specifies requ -
May 19, 2025Knowledge of welding pipelines**1. What type of welding is best for pipe?** The best welding methods for pipes depend on the material, thickness, and application. Common techniques include: - **TIG (GTAW)**: Id -
May 19, 2025Application of welded pipes in the oil and gas industry: Why can spiral welde...Spiral welded pipes have gradually replaced seamless pipes in the medium and low pressure fields of oil and gas through four major advantages: material upgrading, weld strengthenin -
May 19, 2025Welding pipe weld treatment technology: How to improve pressure resistance an...The performance improvement of welded pipe welds relies on the comprehensive application of heat treatment, mechanical processing, anti-corrosion technology, non-destructive testin -
May 19, 2025Seamless Steel pipes vs. Welded Steel Pipes: Core Differences and Comparison ...Select seamless steel pipes: high pressure, high temperature, and strong corrosive environments, with sufficient budget. • Select welded steel pipes: low cost, large batch, large d -
May 19, 2025The main application areas of seamless steel pipes: Why these industries cann...Seamless steel pipes, due to their characteristics of no welds, high pressure resistance and strong corrosion resistance, have become a "must-have" in industries such as petroleum,
