How is S235JR longitudinal straight seam submerged arc welded pipe manufactured?
Longitudinal welded pipe is made by processing steel coils or plates into a tubular shape and then welding them along their length. The name derives from its straight-line welding characteristic.
What is the maximum production diameter of S235JR straight seam submerged arc welded pipe?
The maximum production diameter of S235JR longitudinal straight seam (LSAW) submerged arc welded pipe is approximately 1820 mm (72 inches), with some manufacturers producing pipes up to 2000 mm (80 inches) or 2500 mm (100 inches) in diameter. The specific maximum diameter depends on the manufacturer's production capacity, but 1820 mm is the commonly used maximum diameter in standard LSAW production.
What are the main applications of S235JR longitudinal straight seam submerged arc welded pipe?
S235JR longitudinal straight seam submerged arc welded pipe is mainly used in construction, oil and gas, municipal engineering, and mining. These pipes are used for structural support such as bridges and support columns, as well as for transporting fluids such as oil, natural gas, water, and sewage.
How to inspect the welding quality of S235JR longitudinal straight seam submerged arc welded pipe?
Inspecting the quality of S235JR longitudinal straight seam submerged arc welded pipe should combine visual inspection, non-destructive testing (NDT), and mechanical/hydraulic pressure testing.
What are the commonly used non-destructive testing (NDT) methods for welded pipes?
Non-destructive testing (NDT) is used to evaluate the physical and mechanical properties of welded joints without damaging the equipment. The most commonly used NDT methods include visual inspection, penetrant testing, magnetic particle testing, radiographic testing (RX), and ultrasonic testing (UT).
