Leading Fly Steel Pipe Co., Ltd. is based in China and lists steel tubes and steel pipes on Global Trade Plaza. The company offers seamless square tubes and ERW/LSAW steel pipes with specific dimensions, materials, standards, and applications as detailed in the product descriptions. The seamless square tube product features outer diameters from 40*40mm to 800*800mm, wall thicknesses of 4-40mm, and lengths between 5.8-11.8m, made from materials including Q195-Q215, Q345, 20#, alloy steel, and various international grades, conforming to standards such as GB/T3054-2002, ASTM A500, and JIS G3466. The ERW/LSAW steel pipe ranges in outer diameter from 17-1200mm, wall thickness 4-20mm, and length 5.8-11.8m, with materials like Q235, Q345, 20#, A106, A53, and others, meeting standards including GB/T13793, ASTM A53, and EN 10217. Buyers can send an enquiry through Global Trade Plaza.