Spiral steel pipe is a spiral welded steel pipe made of strip steel or coiled plate as raw material, often extruded and formed by automatic double-wire double-sided submerged arc welding. Spiral steel pipe and its standard classification: spiral seam submerged arc welded steel pipe for pressure flui

Data show that as of November 16, the price of HRB40020mm rebar in Shanghai increased by 200 yuan to 4130 yuan/ton from the previous week, an increase of 5.1%; the main rebar futures contract rose by 70 yuan to 3852 yuan/ton, an increase of 1.9%, based on The gap widened substantially. The apparent