API pipe mill is specialized for manufacturing straight welded pipe for petroleum and gas pipelines. Taking hot-rolled steel as raw material, it produce required pipes through cold roll forming and suitable welding methods like H.F. welding, submerged arc welding and so on. The whole production line adopts ZTF�?? forming technology which is developed by ourselves combined with advanced Japanese FFX technology. ( It is no need to change rollers in breakdown section)
Equipment advantages,
Successfully manufactured China's largest straight seam API pipe production line with Max OD 720mm
Apply to high strength steel and big thickness
ZTF forming process save roller up to 60%
Electric control and automatic adju
Technical flow
Scroll up Uncoiler Straightening end Flattener Auto-Shear and Welding Horizontal Accumulator Strip UTForming(ZTF) H.F. induction welding Removing external burr Removing inner burr Burnishing Online Detection Seam annealer Air cooling Water cooling Sizing Cut off Roll tableFlattening Test End-facing and chamfering Hydrostatic testOff-line UT test Drifter inspectionWeighing and length measurement Coating & Printing Packing Warehouse
Note: We can design and manufacture pipe making machine according to customers' requirements.
Description
Multi-functional Production Line
This kind of mill can produce round pipe,square and rectangular pipe and some of abroach cold rolled section steel
ZTF Forming Technology Used In Producing Round Pipe
Do not need to change moulds in breakdown section, saving about 60% cost on the rollers
Roller changing time is cut down greatly, breakdown section does not need to change moulds and just adjust is ok. And it can cut-down producing period.
Release labor intensity.
Roll forming technology, the caliber is different and propitious for X70,N80 steel strip.
The steel strip is distorted and beared more reasonably, to reduce the rub between the strip and roller, and also reduce the waste of the roller.
It is easier to restore and adjust roller.
Directly Square Forming Technology In Producing Square&Rectangular Pipe
Compare with round into sq uare&rectangle forming way,this way is better for the shape at the edge of cross section,comparatively,
semi-diameter of inner arc is Small,and the brim is flat,outlook is regular.
the whole line load is low ,especially the sizing parts.
The width of steel strip is small about 2.4-3% than round into square & rectangle,it can save the consume of raw material.
It adapt the multi-point bending way, avoid the axial force and side abrasion, reduce the forming step while ensure the quality,meanwhile it reduce the power wastage and roller abrasion.
It adapt the combined type roller on the most of the stands,it realize that one set of roller can produce dozens of square&rectangle pipe with different specification,it decrease the store of roller,low the cost about 80% on roller, Fast the bankroll turnover, short the time one new product design.
Produce Parts Of Abroach Cold Rolled Section Steel
Simple abroach cold rolled section steel such as directly formed channel steel, C shaped steel, Z shaped steel.
Model Round pipe
mm Square pipe
mm Thickness
mm Working spead
m/min
ERW165 76- 165 60x60-130x130 2.0-6.0 50
ERW219 89- 219 70x70-170x170 2.0-8.0 50
ERW273 114- 273 90x90-210x210 3.0-10.0 45
ERW325 140- 325 110x110-250x250 4.0-12.7 40
ERW377 165- 377 130x130-280x280 4.0-14.0 35
ERW406 219- 406 170x170-330x330 6.0-16.0 30
ERW508 273- 508 210x210-400x400 6.0-18.0 25
ERW660 325- 660 250x250-500x500 6.0-20.0 20
ERW720 355- 720 300x300-600x600 6.0-22.0 20
Stainless steel pipe making machine is designed for manufacturing stainless steel straight welded pipe for metallurgy, construction, transportation, machinery and vehicle industries. To be specific, the stainless steel pipe production line can produce round pipe, square and rectangular tube through cold rolled forming and TIG welding technology.
This pipe making machine adopts long steel strip as the material to manufacture steel pipes according to requested size by cold rolled forming and argon arc welding method.
Technical flow
Scrolling up Forming Welding Grinding Sizing Straightening Cutting Run out table Inspecting Packing Warehouse
Note: We can design and manufacture pipe making machine according to customers' requirements.
Description
ERW50 high frequency longitudinal welded pipe production line / pipe making machine / tube mill is designed to produce welded pipes of 20mm-50mm in OD and 0.8mm-3.0mm in wall thickness, as well as corresponding square and rectangular pipe.
Products: GI, carbon steel and stainless steel tubes for metallurgy, construction, transportation, machinery and vehicle industries.
Equipment advantages
High production efficiency, line speed can be up to 120m/min.
High yielding, the machine works stably at a high speed, which improves the yielding of products.
Low wastage, low unit wastage and low production cost.
High accuracy, diam
eter error is only 0.5/100 of the pipe OD.
Round pipe Cold roll forming process Good roller design
Square & rectangular pipe General round-to-square process Stable forming process
Round to square with turkshead Good pipe quality, reach same wall thickness with round pipe
Description
ERW508 H.F. Straight Welded Pipe Production Line
ERW508 high frequency longitudinal welded pipe production line / pipe making machine / tube mill is designed to produce welded pipes of 273mm-508 mm in OD and 6.0mm-18.0mm in wall thickness, as well as corresponding square and rectangular pipe.
Products: architectural structure pipes, API pipes, tower footing tubes, automobile beam steel pipe and other products.
Equipment advantages
ZTF forming process save roller up to 60%
With direct square forming technology, one set of roller can produce all pipe sizes
Electric control and automatic adjustment, high precision,high roller change speed
Description
ERW140 H.F. Straight Welded Pipe Production Line
ERW140 high frequency longitudinal welded pipe production line / pipe making machine / tube mill is designed to produce welded pipes of 60mm-140mm in OD and 2.0mm-5.0mm in wall thickness, as well as corresponding square and rectangular pipe.
Products: architectural structure tubes, low-pressure liquid tubes, coal transmission belt tubes, drive shaft tubes, guardrail tubes, tower footing tubes, automobile beam steel tube and other products.
Equipment advantages
ZTF forming process save roller up to 60%
With direct square forming technology, one set of roller can produce all pipe sizes
Electric control and automatic adjustment, high precision,high roller change speed
Description
Abroach Cold Rolled Section Steel Production Line
It is specialized for cold rolled section steel with wide spread uses for metallurgy, construction, transportation, machinery and vehicle industries. It takes steel strip as raw material, produces cold rolled section steel by cold rolled section forming technology according to relevant request. This kind of technology is advanced and reliable, PROFIBUS technology is also adopted to the control system. All of these ensured highly synchronization accuracy and best product quality. All the indicators and operational costs are controlled at the lowest level, which is greatly rewarded by the producers.
Note: We can design and manufacture pipe making machine according to customers' requirements.
Slitting line is mainly used to slit kinds of wide steel strip into certain width and then recoil them to meet the request of various procedure for welded pipe and cold rolled section steel production.
Production Process of Slitting Line
Loading Coil Uncoiling Leveling Cutting the Head and End Circle Shear Slitter Edge Recoiling Accumulator Steel Head and End Bending Separating Tensioner Coiling Machine
Note: We can design and manufacture pipe making machine according to customers' requirements.
ZTF is a kind of forming technology developed by Zhongtai Company in 2005, which absorbed advanced technology from both domestic and international, and then earn �??Technology Innovation Award�?? by China Cold Forming Steel Association.
ZTF Characteristics:
Do not need to change moulds in breakdown section, saving about 60% cost on the rolls
Roll changing time is cut down greatly, breakdown section does not need to change moulds and just adjust is ok. And it can cut-down producing period.
Release labor intensity.
Roll forming technolog y, the caliber is different and propitious for X70,N80 steel strip.
5) The steel strip is
distorted and beared more reasonably, to reduce the rub between the strip and roller, and also reduce the waste of the roller.
6)It is easier to restore and adjust roller.
II. Where is ZTF used?
ZTF technology is used in breakdown section and only suit to produce round pipes.
III. What is breakdown section and what is fin-pass section?
Normally, we part the mills as forming section and sizing section.
The section before guild-frame is forming and the rest part is sizing section.
For ZTF, we divide forming section into breakdown section and fin-pass section. The part after the unit of vertical rolls is fin-pass section and before is breakdown section.
VI. The development of ZTF technology
The Comparation Among Four Generations of Our Pipe Forming Technology
Description
ERW76 H.F. Straight Welded Pipe Production Line
ERW76 high frequency longitudinal welded pipe production line / pipe making machine / tube mill is designed to produce welded pipes of 32mm-76mm in OD and 1.2mm-4.0mm in wall thickness, as well as corresponding square and rectangular pipe.
Products: GI, carbon steel and stainless steel tubes for metallurgy, construction, transportation, machinery and vehicle industries.
Equipment advantages
High production efficiency, line speed can be up to 120m/min.
High yielding, the machine works stably at a high speed, which improves the yielding of products.
Low wastage, low unit wastage and low production cost.
High accuracy, diameter error is only 0.5/100 of the pipe OD.
Basic Technical Information of Welded Pipe Production Line
Round pipeCold roll forming processGood roller design
Square & rectangular pipeGeneral round-to-square processStable forming process
Round to square with turksheadGood pipe quality, reach same wall thickness with round pipe
