Seamless Steel Pipe

 　　a) The following phenomena occur when the boiler tube is damaged 　　1. The water level of the boiler drops rapidly, the steam pressure and the feed water pressure decrease, and there is a noticeable noise when the boiler tube bursts. 　　2. There is a sound of steam ejecting in the combustion chamber and flue. 　　3. The negative pressure in the combustion chamber changes to a positive pressure, and furnace smoke is sprayed out of the furnace door. 　　4. The feed water flow rate is abnormally greater than the steam flow rate. 　　5. The exhaust gas temperature suddenly drops. 　　6. Unstable combustion of the boiler or cause fire extinguishing. 　　b) Reasons when the boiler tube is damaged 　　1. The boiler inlet water is not deaerated, causing serious corrosion in the boiler tube. 　　2. The circulating water in the boiler tube vaporizes, causing a steam pocket in the tube, causing the tube wall to overheat, causing convex hulls and cracks. 　　3. The quality of boiler feed water does not meet ...

　　Steel pipes are classified into two types: seamless steel pipes and welded steel pipes according to their manufacturing methods. The seamless steel pipe is made of high-quality carbon steel or alloy steel and has hot rolling and cold rolling (extraction). The welded steel pipe is formed by welding a steel plate rolled into a tubular shape by a seam or a spiral seam. In terms of the manufacturing method, it is further divided into a welded steel pipe for low-pressure fluid transportation, a spiral-welded electric steel pipe, a direct-wound welded steel pipe, an electric welded pipe, and the like. Seamless steel tubes can be used in a variety of liquids, gas pipelines, and the like. Welded pipes can be used for water pipes, gas pipes, heating pipes, etc. 　 　1. Welded steel pipe 　　1.1 Welded steel pipe and galvanized welded steel pipe for low pressure fluid transportation 　　The welded steel pipe for low-pressure fluid transportation is made of carbon soft steel. It is the most com...

    Water pipeline AWWA C200 steel water pipe is widely used in the following fields/industries:     Hydraulic power station, potable     Water supply industry, irrigation penstock, Sewage disposal pipe line     AWWA C200 standards covers butt-welded, straight-seam or spiral-seam steel pipe, 6 in. (150 mm) and larger, for transmission and distribution of water, including fabrication of pipe, requirements of welding operations, permissible variations of weight and dimensions, preparation of ends, fabrication of specials, inspection, and test procedures.     Inspection     All work performed and material furnished under this standard may be inspected by the purchaser, but such inspection shall not relieve the manufacturer of responsibility to furnish material and perform work in accordance with this standard.     Quality assurance     The manufacturer shall maintain a quality-assurance program ...