Seamless steel pipe has a very important position in China's steel industry, the low-pressure boiler tubes and high pressure boiler tubes also plays a important role in the seamless steel pipe. Their application environments are relatively poor and have requirements on temperature and pressure , so the production process of low-pressure boiler steel pipe and high pressure boiler tube is very strict.
Boiler tube means a steel products that open at both ends and has a hollow cross section, its length with the surrounding. According to production methods,it can be divided into seamless and welded steel pipe.
Low pressure boiler tubes is made from ingots or solid tube which have been perforated capillary, and then dial made by the hot-rolled, cold rolled or cold. Implementation of standards GB/T3087-2008; representative of the material: 10 #, 20 #; The main purpose of the low-pressure boiler tubes is used to manufacture a variety of low pressure boilers, superheated steam tube, boiling water tube, water wall tube and locomotive boilers superheated steam pipe, opium pipe, small pipe and brick arch pipe. General GB3087 low-pressure boiler tubes can bear 130-140 kg of pressure; hydrostatic testing, crimping, flaring, flattening are done apart from ensuring chemical composition and mechanical properties. Hot-rolled delivery with hot rolled condition, cold-rolled (allocated) delivery heat treatment.