2. Economic analyses of pipes based on the internal optimized anti-corrosion coating Although epoxy ceramic internal anticorrosion will increase the investment, its roughness is small. The pipe diameter can be appropriately reduced, thereby reducing the unit price of pipeline construction and installation....

Abstract: Steel pipes and ductile iron pipes, as the first choice in the construction industry, have their own advantages and disadvantages. The economy of pipe engineering from the perspective of investment is analyzed, providing economic value reference for the comparison and selection of engineering pipes. For...

Features of high pressure boiler tubes The material of the high-pressure boiler tube will creep because it works under high temperature and high pressure for a long time, resulting in a decline in plasticity and toughness, change of the original structure and corrosion. The steel pipe used for the...

The main influencing factors of corrosion of OCTG pipes PH value: Hydrogen ion is a cathode depolarizer. Generally, the lower the PH value is, the more serious the metal corrosion becomes. When the pH value is greater than 6.6, the corrosion rate begins to decrease. Cl- or total salinity:...

The classification of heat-supply pipelines According to the different flow media in the pipe, it can be divided into steam pipes and hot water pipes. According to the different working pressure, the heat-supply pipeline can be divided into three types: low pressure, medium pressure and high pressure pipelines. According...

Welded steel pipes, also known as seamed steel pipes, are generally made by coil weld with steel plates or band steel. Classification according to the surface treatment of pipes Welded steel pipes can be divided into galvanized and non-galvanized steel pipes. The galvanized surface of the...

The seamless steel pipe can be divided into the following five categories. 1. Seamless carbon steel pipe Commonly used manufacturing materials are 10, 20, 16Mn steel. The specification of the pipe is as follows: Hot rolling outer diameter: φ32-630mm. Cold drawing outer diameter: φ6-200mm. Single pipe...

23Mn (Q345B) steel pipe is a low-alloy high-strength structural steel with carbon content of 0.1%-0.25%, and main alloying elements such as manganese, silicon, vanadium, niobium and titanium are added. Its total alloy content is less than 3%. Grade A and B steels are usually called 16Mn16mn steel pipes....

There are several inspection methods: Tensile test On the tensile testing machine, the following results can be obtained by stretching the sample: Yield point (yield strength): Under the force of the tensile machine, the specimen is stretched. At the beginning, the elongation of the specimen is proportional to the...

Seamless steel pipe is a steel pipe without welding seam manufactured by hot processing methods such as perforated hot rolling. If necessary, the hot-processed tube can be further cold-processed to the required shape, size and performance. At present, seamless steel pipes (DN15 - DN600) are the most widely used pipes in...

The development of steel pipe technology began with the rise of bicycle manufacturing. It strongly promotes the development of steel pipe industry in terms of variety, output and quality due to the development of oil in the early 19th century, the manufacture of ships, boilers and planes during two world wars, including...

According to the use and pipe materials, the commonly used connection methods for building pipeline are: ① threaded connection, ② flange connection, ③ welded connection, ④ groove connection (hoop connection), ⑤ cartridge connection, ⑥ hot melt connection, ⑦ socket connection. This article explains in detail the standard...