1.1 Raw material specifications:
Round steel：Material (steel grade)Q235、Q345B、45#、12Cr1MOVG etc
1.2 finished product
Steel pipe length 3～6m
Execution standard GB-8162
1.3 Mode of production：Hot rolled forming
Molding process: continuous production。
1.4 the equipment unit running speed ：
Pipe rolling speed：36m/min
Diameter sizing speed：36m/min
Pipe cutting speed：3pcs /min
1.5 Product percent of pass 96%
2. pipe rolling process
2.1 technological process
Round steel feeding—Round steel heating—round bar piercing —steel pipe diameter sizing—Steel pipe straightening—steel pipe end cutting —Other hoisting equipments.
2.2 The equipment unit technology introduction
First make the coal gas producer make out coal gas，make inclined bottom furnace preheating temperature，Raw materials are put at the inclined hearth furnace by the lifting hook after entry into the heating furnace heated to a certain temperature. The sticking steel machine make the round steel ejection inclined hearth furnace. Into the feed holder，pipe turning-over device send the round steel into the perforation machine feeding rack，and then send by the support steel machine into perforation machine host to coarse punching。After the steel pipe coarse punching forming ,the turning-over device will turn the steel pipe into the tactic holders and then send into the pipe mill feeding holder. The feeding holder will send the steel pipe into the twice hot rolling mill to hot rolling again .Secondary hot-rolled steel pipe goes into the diameter sizing machine make the final steel pipe forming .and then the steel pipe goes into the Straightening machine by tactic holders and feeding holders ，make the pipe straightening Process. after straightening the pipe be sent into the tactic holder sand loading holders for pipe sizing and end cutting , inspection and storage
2.3 environmental conditions of the machine units located
2.3.1 The heating temperature 750℃～1000℃
2.3.2 The compressed air pressure 0.35～0.7Mpa
2.3.4 max height of the machine ≤2.5m
3．Single unit technical requirements
3.1 coal gas generator ：coal gas generator、Dust collector, etc。
3.1.1 The technical requirements
Coal gas generator use coal as the raw material turn into gas transmitted in to inclined hearth furnace by drainage pipeline. Dust collector to deal with air pollution during the process of coal conversion gas
coal gas generator：φ2000
3.2 Inclined hearth(bottom) furnace：Refractories, shell, support steel machine consist
Refractory rock wool and refractory brick consist of it ,the temperature 1100°.
The shell：Is composed of steel plate and proximate matter.
Steel plate：2mm，proximate matter composed of 5*5 angle steel and 120mm channel steel.
3.2.2 steel push-out machine；
composed of proximate matter, chain, reducer, etc
proximate matter, chain, reducer use the original national standard,
3.3 double rollers piercing unit
3.3.1 perforation machine
Double rollers piercing mill by the motor reducer drive, rollers to perforated steel pipe.
Sizing roller (encircle roller)：In the process of steel pipe perforation make mould have stability.
Perforation speed: 36m/min
3.4 diameter sizing machine unit
3.4.1 diameter sizing machine driven by the motor reducer, the rollers sizing the steel pipe outside the pipe .
3.4.2 technical requirements
Diameter sizing speed ： 36m/min
3.5 Straightening machine
3.5.1 technical requirements
straightening machine make steel pipe straightening driven roll by the motor reducer.
3.7 pipe ending cutting machine
3.7.1 technical requirements
using band saw cut pipe both ends to realize the pipe length sizing
Cutting speed ：3pcs/min