Import and export

"Imported" simple import and introduced along with the complete set of engineering and other two channels. In recent years, several major ports along the coast of China, dalian, tianjin, qinhuangdao, lianyungang, etc.) in the construction and expansion of import and export of commodities such as oil, coal, grain, automatic loading and unloading engineering as the main body equipment introduced at the same time, the large channel steel imports are increasing. Main production countries and regions as Japan, Russia and Western Europe.

Appearance requirements
Channel steel surface quality and the geometry of the allowable deviation has specific provisions in the standard. General requirements shall not use harmful defects of the surface, can not have significantly, a reverse regulation channel wave bending (rocker) permitted channel steel surface shape and specification of the parameters (such as h, b, d, t) value, the tolerance values. The main performance of the channel geometry is not correct is: Angle, legs spread and etc.

Theoretical weight

Unit: kg/m, mm

Allowable deviation

(mm)

Height h ±1.5 ±2.0 ±2.0 ±3.0 ±3.0

Leg width b ±1.5 ±2.0 ±2.5 ±3.0 ±3.5

Waist thickness d ±0.4 ±0.5 ±0.6 ±0.7 ±0.8

The bending deflection should not exceed 0.15d

Usually length 5 ～12m 5 ～19m 6 ～19m