The use of welded steel pipe

　　　　1.Low-pressure fluid transmission with welded steel pipe, also known as the general pipe, commonly known as black tube. Is a welded steel pipe for the transport of water, gas, air, oil and heating steam, and other generally lower pressure fluids and other uses. Steel pipe wall thickness is divided into ordinary steel pipe and thickened pipe; take the end of the form is divided into non-threaded steel pipe (light pipe) and threaded steel pipe. The specifications of the steel pipe are denoted by nominal caliber (mm), and the nominal caliber is the approximate value of the inner diameter.

　　2. Low-pressure fluid transmission with ISO9001 Stainless Welded Steel Pipe, also known as galvanized welded steel pipe, commonly known as white tube. Is used for conveying water, gas, air, oil and heating steam, warm water and other general low pressure fluid or other uses of hot dip galvanized welding (welding or welding) steel pipe. Steel pipe wall thickness is divided into ordinary galvanized steel pipe and thick galvanized steel pipe; take the end of the form is divided into non-threaded galvanized steel pipe and threaded galvanized steel pipe. The specifications of the steel pipe are denoted by nominal caliber (mm), and the nominal caliber is the approximate value of the inner diameter. Used to use in inches, such as 11/2 and so on.

　　3. Ordinary carbon steel wire casing (GB3640-88) is the industrial and civil construction, installation of electrical equipment and other electrical installation works to protect the wire of the steel pipe.

　　4. Straight seam welded steel pipe (YB242-63) is the weld and steel pipe longitudinal parallel to the steel pipe. Usually divided into metric welded steel pipe, welded thin-walled pipe, transformer cooling tubing and so on.