The difference of normal steel pipe pile
and spiral welded pipe
The first is the different welding methods, different arc welded pipe, high frequency and low frequency resistance welded pipe, gas pipe, furnace pipe can be divided according to the Bundy pipe. By welding the shape, it can be divided in longitudinal and spiral steel pipe piles. Welded steel pipe piles for oil drilling and machine building.
Φ219 - Φ2032, 5 ~ 18mm, the material Q235, Q345, the level of the wall thickness X42-70.
Welded steel pipe pile Seamless steel pipe pile is a kind of low cost, high production efficiency.
Vertical manufacturing process is simple, high production efficiency, low cost, rapid development.
Generally higher than spiral welding vertical, but you can narrow the pipe diameter of the larger pipe production, you can also use another production of the same width billet diameter.
However, the length of the weld, and the decrease in productivity of the straight seam pipe 30 ~ 100% is the same length and comparison.
Spiral welded steel pipe piles, curved bands or plate wheels, refer to square or other shapes, and then welded to the surface of the connecting pipe.
Welding methods, different arc welded pipe, high frequency and low frequency resistance welded pipe, gas pipe, furnace pipe, can be divided according to the Bondi pipe.
According to welding shape, it can be divided in longitudinal and spiral welded pipe.
Welded steel pipe piles for oil drilling and machine building.
Furnace tubes are used for water and gas, such as large diameter vertical welded steel pipe piles for high pressure oil and natural gas transportation pipelines, and spiral welded pipes for oil and gas, piles, such as in the use of terminals such as piers.
Therefore, the large diameter spiral welded pipe of the spiral submerged arc welded pipe of the submerged arc welding pipe and the joint of the small diameter pipe is the most submerged arc spiral welded steel pipe pile, Spiral welded pipe, known as spiral) spiral welded steel pipe piles.
; 2) since it is of a curved continuous, 1), as long as the formation of a change in the angle of the tube, then it can use the strip to produce the same width of various caliber: it is widely present in the large spiral pipe pile infinite 3) uniform pipe spiral welded pipe and high dimensional accuracy, high strength and distribution throughout the entire circumference. 3) Uniform pipe spiral welded pipe and high dimensional accuracy, high strength and distribution of the entire circumference.
A method for manufacturing steel pipe pile.
(3), flattening cutting, pruning, planing, the process of my crimping, and the surface cleaning after the transportation of the strip prior to the formation of the strip. (3), the rolling strip head-tail docking, monofilament or double-wire submerged arc welding automatic submerged arc welding. (4) the use of electrical contact pressure gauge, in order to ensure the smooth supply of belt to control the pressure cylinder pressure side of the conveyor.
Spiral welded pipe technology (precision seamless steel pipe pile, DIN2391 precision seamless steel pipe pile, cold drawn precision bright tube): (1) raw material belt, wire, flux.
Before it is placed, we all need to go through rigorous physical and chemical tests.
(1) Submerged steel, monofilament or double-wire submerged arc welding with head-to-tail welding by automatic arc welding.
(2) before the flattening, cutting edge, planing, surface cleaning conveyor and the process of curling after me to form the belt.
(3) the use of electrical contact pressure gauge, in order to ensure a smooth supply of belt to control the pressure of the cylinder pressure side of the conveyor.
(4) the use of air plasma cutting machine, spiral steel pipe pile will cut a single tube.
(5) into a single tube, strictly for the manufacture of the first three inspection systems of each batch of steel to ensure that the weld quality, chemical composition, fusion state, the surface quality and mechanical properties of steel pipe pile nondestructive testing to the official Production can be carried out after the treatment tube.
(6) If there is a re-destructive test after repair, continuous ultrasonic flaw detection of defects to be solved, welding defects, there is a marked manual ultrasound and X-ray examination of the site.
(7) Use an internal or external control roll.
(8) welding requirements, the diameter was adopted, weld gap control device to ensure that the weld gap to meet the welding gap, which is strictly controlled and the wrong side.
(9) Welded and welded to obtain stable welding instructions, have been used in single or double wire submerged arc welding in the United States outside of Lincoln Welding.
(10) In order to ensure 100% coverage of the nondestructive testing of helical welds, this terminates the continuous ultrasonic weld inspection of the weld line.
Defective, if sprayed with automatic alarms and labels, production workers, so adjust the process parameters, the timely elimination of defects.
(11) Here, the steel-welded pipe spiral welds, through all the X-ray television and film inspection, and then through the D-type connector.
Hydrostatic test pressure is radially sealed after each tube.
(12) test pressure and time by the steel pipe pile hydraulic microcomputer detection device, will be strictly controlled.
(13), tube end treatment, can precisely control the vertical in the end, bevel and dull edges.