The characteristics of thick walled seamless steel pipe production line is the production line length, transmission equipment, tension control strict requirements, strip steel is easy to deviation, required continuous production. Thick wall seamless steel tube rolling process, local advance into the austenitic seamless steel tube manufacturer non recrystallization region and two-phase zone limit. Non recrystallization zone rolling to get ferrite austenite grain size and uniform and rolling the total deformation volume and pressure rate, when the total amount of deformation and pressure ratio is greater, ferrite grain finer and more uniform. Local area is also known as the crack opening and the central, due to excessive cold, compared with the substrate side to advance into, therefore opening cracks of the ferrite grain size is smaller, base material grain changes little, two differences lead to rolling crack.

Thick wall seamless steel pipe continuous hot dip galvanizing production line according to the production process is divided into three parts, the entrance section, the process section, the entrance section. Entrance effect is 45# seamless steel pipe to ensure into the process section steel strip continuous, main equipment uncoiler, welding machine, roll 1#S, entrance live chariot; process device with roller 2#S, furnace roller, furnace grate, zinc pot, air knife, 3#S and and the requirements of thick walled seamless steel pipe running speed is constant, the galvanized layer is thin and uniform; entrance to the plated finish with zinc strip rolled up in volume and ensure the production of continuous, main equipment has entrance live chariot, 4#S roll, roll before clamping feeding roller, a coiling machine etc..

Demand attention, River steel April envy sheet guide price promulgated, most varieties were to rise by more than 400 yuan, become the market once again pulled the fuse.

Although the experience some time ago surged to plunge, but all the varieties of steel price compared to the previous stage lows still larger increase, in the short term there is still demand of debugging, especially surged after haven't dropped and the variety of the city, prices contribute to the risk of release, there is help to the healthy operation of the market outlook.