The total heat transfer coefficient of a metal depends on other factors besides the thermal conductivity of the metal. In most cases, the heat dissipation coefficient of the film, the rust skin and the surface condition of the metal. Because stainless steel keeps the surface clean, it conducts hea

Spiral steel pipe production technology (1) raw materials that is, strip coil, welding wire, flux. They are subjected to strict physical and chemical tests before they are put into use. (2) The butt joint of strip steel head and tail adopts single-wire or double-wire submerged arc welding, and

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

Straight seam steel pipes and spiral steel pipes are both a kind of welded steel pipes. They are widely used in national production and construction. Straight seam steel pipes and spiral steel pipes have many differences due to different production processes. The following details will discuss the n