The service life of galvanized steel pipe fittings is long, but the service life is different in different environments: 13 years in heavy industrial areas, 50 years in the ocean, 104 years in the suburbs, and 30 years in the city. The production of yellow water is directly caused by galvanizing. Du
According to the deformation principle of rolled parts, steel rolling is generally divided into the following three forms:1. Longitudinal rolling: the running direction (axis) of the rolled piece is perpendicular to the axis of the roll, and the rolled piece moves in a straight line; steel and plate
1. Welded steel pipes are produced continuously online. The thicker the wall thickness, the greater the investment in the unit and welding equipment, and the less economical and practical it is. The thinner the wall thickness, the lower its input-output ratio will be.2. The technology of this produc
(1) When the cooling is completed, that is, when the temperatures of the surface layer and the core are all consistent, the elastic deformation of the surface layer and the core will also disappear and return to the original state. Although instantaneous thermal stress is generated during the cooli
1. Power supply with vertical external characteristics is adopted, and the positive polarity is adopted for direct current (the welding wire is connected to the negative electrode).2. Generally suitable for the welding of thin plates below 6mm, with the characteristics of beautiful weld shape and sm
Commonly used welded steel pipes are divided into the following three types according to the welding process used in their production. ① Continuous furnace welding (forge welding) steel pipe: It is characterized by high production efficiency and low production cost, but the metallurgical combination
1. Welded steel pipes for low-pressure fluid transportation are used to transport water, gas, steam, compressed air, etc.; structural welded steel pipes can be used to manufacture scaffolding, trusses, towers, playgrounds, railings, etc.;2. Special-shaped tubes for steel doors and steel windows are
The connection of the pipe fittings is based on the required performance of the pipe connection. The connection types between the pipe fittings and between the pipe fittings and the pipe are butt welding connection, socket welding connection, pipe thread connection, and flange connection.1) Butt-wel
How to keep stainless steel pipes When storing, pay attention to moisture, dust, oil, lubricating oil, etc., as well as rust on the surface, or poor welding corrosion resistance. When moisture is immersed between the film and the steel substrate, the corrosion rate is faster than when there is no fi
