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May 21, 2025Quality Control and TestingWhat quality tests are performed on welded pipes? Non-destructive testing includes ultrasonic, radiographic and hydrostatic examinations. Mechanical testing evaluates tensile stren -
May 21, 2025Welding Technologies for Steel PipesHow does High-Frequency Electric Resistance Welding (ERW) work? ERW uses high-frequency electrical current to heat the edges of steel strips to welding temperature. Pressure is the -
May 21, 2025Fundamentals of Welded Steel PipesWhat are welded steel pipes? Welded steel pipes are tubular products manufactured by bending and welding steel plates or coils. They are primarily categorized into longitudinal sea -
May 20, 2025S275 steel use for**1. What steel grade is equivalent to S275JR?** The closest equivalent to **S275JR** (EN 10025 European standard) in other international standards is: - **ASTM A36** (USA) – -
May 20, 2025ASTM A36 and S275JR1. **What material is equivalent to St37?** St37 is an older German steel grade designation (DIN standard) that is broadly equivalent to **S235** in the EN 10025 standard. It is al -
May 20, 2025the hardness of ST37 steel1. **Hardness of ST37 Steel** ST37 steel (a common structural steel in Europe, equivalent to S235JR) typically has a Brinell hardness (HB) of approximately **120–160 HB**, de -
May 20, 2025St37 steel pipe**1. What is ST37 pipe material?** ST37 is a carbon steel material specified under the German standard **DIN 17100**. It is a non-alloy structural steel with a minimum tensile stre -
May 20, 2025the plastic boiler pipe**1. What is the plastic pipe from a boiler?** The plastic pipe connected to a boiler is typically a **condensate drain pipe**. Modern condensing boilers produce acidic condensate -
May 20, 2025the different types of boiler piping1. **Different Types of Boiler Piping** Boiler systems include several types of piping, such as: - **Supply/Discharge Pipes**: Carry heated water/steam to radiators or distribution -
May 20, 2025Steel pipes for boilers**1. What kind of pipe is used for boilers?** Boilers typically use **seamless steel pipes** made from carbon steel or alloy steel. These pipes are designed to withstand high press -
May 20, 2025Market and Trends of Carbon Steel PipesWhat are the key factors affecting the price of carbon steel pipes? Fluctuations in the price of raw materials (steel billets) directly determine costs. The price increase of iron
