ASTM Q235 Q345 Hot Rolled Cold Drawn Spiral Steel Pipes Tube Spiral Welded Steel Pipe

Description

Generally used in: welding into pipes for fluid transportation, metal structures, pile foundations, etc.

The products are widely used in tap water projects, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction, and are one of the 20 key products developed in my country. For liquid transportation: water supply and drainage. For gas transportation: coal gas, steam, liquefied petroleum gas. For structural use: as pile pipes, bridges; docks, roads, building structure pipes, etc.

Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, extruded at room temperature, and welded by automatic double-wire double-sided submerged arc welding process.

(1) The raw materials are strip steel coil, welding wire, and flux. They must undergo strict physical and chemical inspection before being put into use.

(2) The head and tail of the strip steel are butt-jointed by single-wire or double-wire submerged arc welding, and automatic submerged arc welding is used for repair welding after rolling into steel pipe.

(3) Before forming, the strip steel is leveled, trimmed, planed, surface cleaned, conveyed and pre-bent.