High-frequency pipe has many problems among which opening and crack are the two common ones. This artcile introduces about the two problems and its relevant solutions.   1.Opening   (1) Characteristics Crack openings > = 0.4 mm. Welded joint is straight. Plate edge end face without melting trace or with melting...

Galvanized pipe can be classified into two kinds: cold galvanized steel pipe and hot dip galvanized steel pipe. The former has been forbidden, and the latter has been advocated temporarily in China.   1. Hot Dip Galvanized Steel Pipe   Hot dip galvanized steel pipe is to make the molten metal react with iron...

Welded steel pipe is shaped up by crimping steel plate or steel belt and then it was made after welding. Welded steel pipe can be classified into longitudinally-welded pipe and spiral welded steel pipe according to the ways of welding. The common forming technique of longitudinally-welded pipe is UOE forming process and...

Seamless steel pipe can be classified into the following several kinds because of its different standards:   1. GB/T8162-1999 (the structure is made by seamless steel tube). It is mainly used for the general structure and the mechanical structure. It represents textures (brands) : carbon steel No 20 and No 45; Alloy...

Double-sided Submerged Arc Welding (LSAW - Longitudinal Submerged Arc Welded), a new kind of welding method, was invented in 1940. Compared with the manual welding, the same point is that LSAW is using slag protection technology, but the slag is not the coating of electrode. The welding flux is made of by the slag specially...

Production technology development of steel pipe began in the rise of bicycle manufacturing. Many events are effectively driving the development of steel pipe industry in varieties, yield and quality such as the exploitation of oil in the early 19th century, the manufacture of ships, boilers and aircraft during two world...

The carbon content is the difference between steel and iron. Metallurgical industry is usually divided into ferrous metallurgy industry and non-ferrous metallurgical industry. Burden among multiple varieties belong to ferrous metallurgy, mainly including iron, cast iron, steel and iron alloy, etc.   Steel contains...

1. Application of Seamless Steel Pipe Seamless steel tube, the very important role in the national economy, is a kind of economic cross-section steel. It is widely applied in many departments such as petroleum, chemical industry, boiler, power stations, ships, machinery manufacturing, automobile, aviation, aerospace,...

Galvanized steel Pipe is surface finished pipe that has been coated with a thin layer of zinc to help prevent corrosion. Zinc, a natural, healthy, and abundant element was first used in construction in 79 AD. Zinc metal has a number of characteristics that make it a well-suited corrosion protective coating for iron and...