Brief introduction and quotation of
BG20 high precision machine unit for stainless steel welded pipe
Description of product
This equipment is specially used for producingΦ8-Φ25.4mm,
δ0.5-1.5mm stainless steel straight seam welded pipe. It made by
refined materials in high precision and equipped with fixed length
cutting saw. The main machine includs forming, welding ,sizing and
straightening device. The composition of equipment is from uncoiler
to fixed length-cutting saw. Rolling speed can be adjusted
correspondingly within suitable range of pipe diameter and wall
- Applicable material:
- Material: SUS302 stainless steel strip
- The thickness of steel strip: 0.5-1.5mm (As per GB708-88)
- The width of steel strip: 25-80mm(±0.2mm)
- I.D. of steel coil: Φ450-Φ550mm
- O.D. of steel coil: Φ600-Φ1000mm
- Maximum weight coil: 500kgs
- Dimension range of processing steel pipe:
- O.D.: Φ8-Φ25.4mm
- Wall thickness: 0.5-1.5mm(Square and rectangle pipe≤1.0mm )
- Length: 4-8m
- Product (steel pipe) process flow:
Raw material (steel coil)→uncoiling→shearing and end
welding→non-power leveling→forming and shaping→TIG
welding→Polishing burrs outside of weld seam→cooling→sizing and
shaping→roughly straightening→ fixed length cutting→finished
1.5 Milling speed: 0-8M/min
1.6 Product precision: maximum tolerance of diameter±0.05mm
1.7 Ar-arc welder: 400A
1.8 Advised user’s necessary accessories (only for reference):
- Mechanical equipment site: 20m ×4m (length × width)
- Total electrical power: 25KW
- One set of air compressor(Prepared by customer, Purchase from
- Welding tool: tungsten bar, tungsten filament,Polishing wheel.
- Lifting equipment and tooling for installing machine, maximum
weight of one part is 4 tons.
- Power and air supply. (380V/50HZ)
Introduction of main components:
Structure type: Double-side 360ºrotary manual expanding tight,
which insure steel coil feeding alternatively and make steel strip
going into accumulator freely.
Applicable range: 25-80mm steel strip width, 0.5-1.5mm thickness,
Φ600-Φ1000mm steel coil O.D., Φ450-Φ550mm steel coil I.D.,
Max.500kgs steel coil weight.
- Shearing and butt-welding machine, which insure double steel coil
shearing tidily and then welding together and leveling weld seam.
- Forming, welding and sizing unit:
Feeding & leveling device:
Form: Five rolls are passively leveled for straightening strip
steel before it is fed into forming unit.
Mainly roughly mill-forming steel strip and controlling weld seam.
a. Horizontal roll stand: (Three fin pass)
Structure: 45#Cast steel, double housing, changing rolls in the
Diameter of horizontal roll’s shaft: Φ36mm, material: 42CrMo
b. Vertical roll stand:
Quantity: 10(Including one guiding roll stand)
Type: Passive rotation
Diameter of vertical roll’s shaft: Φ20mm, material: 45# Forging
c. Adjusting method: Single spiral pole manual adjusting
d. One set of bed for installation
(3) Guiding extruding and welding scraping apparatus:
a. One set of guide roll stand for controlling direction of pipe
seam to insure pipe seam flatly and straightly entering into
b. Two sets of extruding roll stand for controlling weld seam to
realize successful welding.
c. Two sets of scraper frame for scraping outside weld seam
(4) Sizing device: Mainly fine shaping pipe after welding and
controlling size accuracy. Each 5 sets of horizontal roll stand,
vertical roll stand, three sets of gearbox branch (double
connection), and 10 sets of universal shaft. (Structure same as
(5) Roughly straightening machine frame:
a. Usage: It is mainly used for roughly straightening of finished
b. Form: Turk’s head type, 4 rolls single-side two sets
c. One installation bed along with sizing machine.
(6) Main driving system: The main unit is connected with main
reducer by main motor and transmits power to gearbox branches, then
gearbox branches drive upper and down shafts on horizontal roll
a. Master motor: Z4 series, DC 7.5KW, one set
b. Universal transmission shaft 26 pcs
2.4 Pneumatic tracking cutting saw:
(1) Cutting method: Pneumatic tracking and automatic cutting
(2) Cutting thickness: δ0.5-1.5mm
(3) Cutting O.D.: Φ8-Φ25.4mm
(4) Cutting length: 4-8m
(5) Cutting motor: 3KW
(6) Cutting tolerance: ≤10mm
(7) Cutting motor: 3KW
(8) Controlling system: By encoder.
2.5Ar-arc welder: 400A(TIG system)
2.6Finished pipe passing conveyor:
Welded frame structure equipped with sizing signal system
(1) Rolls for welded pipe will be ordered additionally according to
type and specification provided by customer.
(2) When signing sales contract, we will discuss the following
expense: Need two persons, the buyer should charge of Visa, return
ticket, food and accommodation and person/day for salary.
(3) The date of delivery:90 days later after receiving 30% of total
(4) The terms of payment: 30% should be paid after signing S/C, and
the remaining 70% before delivery.