China API Standard Back-Swing Spiral Welded Pipe Mill

Back-swing spiral welded mill introduction:
The steel coils are unfolded and leveled by the mill equipment. And they are sent to the forming machine in a certain angle. Supplemented by a certain angle, the continual pipes are formed in the principle of three-roll rolling machine. Continual spiral welding is welded by submerged-arc welding machine. The uncoiling, coil detaching, leveling, steel cutting and welding are working on the fly-welding carriage. When the steel is welded, the fly welding carriage moves forward in the same speed with the host equipments. The host machine will not have the stop. After the steel welding finishing, fly welding carriage backs forward to the original position t owait another coil. This mode is called continuous production method with high efficiency, high pipe quality, rare welding repair and other advantages.
According to the different function of our products, the back swing spiral welded pipe mills are divides in to API standard model and national standard model. API standard model mainly produces the delivery pipe with petroleum or natural gas (long distance).the material and quality of the steel pipe need to be very good. The requirements for mill equipment and testing equipment also are very high. National standard model produces the pipe used for short distance delivery of natural gas or water, the pipeline construction in the city, the structure pipe, column pipe and so on. The requirements for the material and quality of the steel also are very high, second only to that of API standard.
Technical Proposal
Summary
The welded pipe mill is a front swing spiral welded pipe mill, which is a mature and reliable advanced technology and technology in the world. The company has adopted the latest international and domestic leading technology, its main objectives: product quality, production costs, various consumption indicators and labor productivity has reached the domestic advanced level.
The welding pipe mill is a set of mechanical, electrical automation control, hydraulic control integration of the complete spiral welding pipe equipment. This mill is designed and manufactured with equipment safety operation protection device and operator safety protection facilities. To protect the operation safety of important equipment and operators. For example, in the press-down mechanism of the delivery machine, it has the self-protection function when the plate thickness suddenly changes. The operability and safety of the whole unit have been improved qualitatively.
Our company has more than ten years of experience in the production of spiral welded pipe sets, and actively introduced MEG technology from Germany, which has reached the international advanced level. In the manufacturing process, strict control, excellence. The products can be comparable with foreign mill, but the price is less than 1/3 of the foreign mill, with a high cost performance.
This mill is our company's most advanced model, with the following new and patented technology:
A.Uncoiler automatic centering function(patent technology):
There is the centering button on the operation stand of uncoiler. When the button is switched on, the double cone heads will automatically centralize the mill centerline. Then, the coil center is consistent to the mill center. It is no need to adjust with the vertical rollers. The production efficiency is improved and the instability is decreased.
B.Vertical roller automatic centering function(patent technology):
There is centering button on the vertical roller operation stand. When the button is switched on, two vertical rollers will automatically centralize the mill centerline. Then, the steel center automatically centers the mill center. It is no need to have the adjustment. Centering is important in manufacturing the pipes. Especially, when the steel has the steel ends cutting and steel welding, the steels have no need to be adjusted. Then, the time is saved and production efficiency is improved.
C.the cutter head automatically adjustment function of edge miller(patent technology):
After the steel thickness and material are set up, the cutter head speed of two edges. The mill can be automatically adjusted according to the main machine. It guarantees the accuracy and timeliness and longs the blade life.
Besides, this mill has the steel end bending device of uncoiler to guarantee the smooth feeding of steel end. The split and combined structure will be adopted when the steel is sheared and welded, which let the beveling to be reached.
The main target: products quality, cost of production, various consumption index and production rate in labor have reached advanced standard inland.
The welded pipe unit is the complete spiral welded pipe line in the integration of mechanical,electrical & automation control, and hydraulic control.
During the design and manufacture,the line is installed the protective device on the safe operation of equipment and operation staffs safety protection, such as the self-protection function turns on in the screw down mechanism of the transfer wheel when the machine meets the changing of thickness on the plate. All of these is to guarantee the safety of operation and staffs.
With the control system applying to the AS-Interface, the operational parameter of the mill conducting digital, combining with all grades force protective component set on the hardware, various transmission devices, it can be managed according to the system software. The all kinds of operation parameter is analyzed and managed. Adjust the operational state in time. They are shown in the HMI too for operator. It let the whole mill more advanced and improved on the operation part and safety part.Manufacturing process:
Coil preparing → coil opening→leveling → centering → cutting & welding → centering →edge miller → steel edge derusting and steel surface cleaning →centering →feeding→ pre-bending → forming → inner & outer welding →online UT detector→ pipe cutting→ repair welding→X-ray inspection→ hydrotester→pipe end facing and beveling → finishing pipe storage
Main Machine
encoilerLevelerElectrical Vertical RollerCutting & Welding MachineEdge Millersteel surface cleaning deviceDelivering machinePr-bending &guide boardForming MachineInternal and external welding deviceFront axle assayRear axle bodyFly Cutting machinePipe Droping MachineFoundation bolt embedded partsHydraulic Systemelectrical control machine
Pipe End facing & Beveller1200T Hydrotester
active rollerPassive rollerRotating RollerReceiving and pulling pipe devicePulling Pipe DeviceReceiving Pipe DevicePipe resisterRankHydraulic Systemelectrical control machineinstallation commissioning
The seller provides on-site installation and guidance services. The seller's visas, round-trip airfare, meals, and accommodation are the responsibility of the buyer, and the seller's staff will pay USD 100 per person per day.
Delivery date
8-month delivery after the contract takes effect
3.35 Term of Payment
Prepaid 30% by T/T, at this time the contract officially takes effect;
Equipment production is completed and acceptance after, the buyer pays70% by T/T.
Warranty period is one-year, free maintenance of quality problems caused by equipment problems within one year