CN106694609A - Method for manufacturing X80-stage phi1422 mm longitudinal submerged arc welding pipe - Google Patents
Method for manufacturing X80-stage phi1422 mm longitudinal submerged arc welding pipe Download PDFInfo
- Publication number
- CN106694609A CN106694609A CN201510783598.0A CN201510783598A CN106694609A CN 106694609 A CN106694609 A CN 106694609A CN 201510783598 A CN201510783598 A CN 201510783598A CN 106694609 A CN106694609 A CN 106694609A
- Authority
- CN
- China
- Prior art keywords
- arc welding
- submerged arc
- welding
- pipe
- grades
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a method for manufacturing an X80-stage pipeline steel longitudinal submerged arc welding pipe. The method is used for manufacturing submerged arc welding pipes special for oil and gas conveying. The method comprises the steps that a hot-rolled steel plate with the microscopic structure being a proeutectoid ferrite+MA+granular bainite polyphase structure is utilized, and after processes of edge milling, pre-bending, JCO molding, pre-welding, finish welding and the like, the large-caliber, thick-wall and large-strain submerged arc welding pipe capable of being used for seismic zones, permafrost regions, landslide zones and other areas with deformation prone to happening is manufactured. The longitudinal submerged arc welding pipe manufactured through the method has the beneficial effects that the good mechanical property is achieved, the overall property of the welding pipe is uniform and stable, the geometric dimension is good, and the use requirements of steel pipes for seismic fracture zones, the permafrost regions and the landslide zones can be met.
Description
Technical field
The present invention relates to a kind of ERW manufacture method, feature relate to a kind of X80 grades
Φ 1422mm super large calibers, heavy wall, big strain specific use straight-line joint submerged arc welding tube manufacture method.
Background technology
A new round mainline gas pipeline construction requirement have fed distance it is long, using higher pressure
The characteristics of being conveyed with heavy caliber, occurs in that the trend of Long-distance Transmission Pipeline maximization, it is necessary to adopt
With high intensity, the colliery carries tubing of big wall thickness.X80 grades of pipe line steel is used as a kind of ripe high intensity
Pipe line steel kind, as high pressure, big input quantity natural gas transmission pipeline tubing, can effectively drop
The cost of low pipeline construction, with larger economic benefit.
By long-term, substantial amounts of exploitation, it is easy to which the area for exploiting petroleum resources has obtained a large amount of
Exploitation, oil-gas mining is increasingly towards the regional development that remoter, geology is more complicated.In pipe
During road is built, pipeline will be by more earthquake zones, permafrost region, landslide band etc., so to pipe
The non-deformability that will not only there be high pressure, the requirement of big throughput rate, Welded Pipe in road also improves higher
It is required that, to ensure the safety and stability of pipeline.For the heavy caliber with big adaptability to changes,
For heavy wall submerged-arc welded (SAW) pipe, being continuously increased with pipe line steel wall thickness, body are not only solved
The key indexs such as DWTT performances, low-temperature impact toughness, yield tensile ratio and uniform elongation are more difficult to reality
Existing contradiction, while to make the welded tube have a good linear deformation ability, and ensures welded tube anti-
Plasticity and toughness will not significantly decline in rotten coating procedure, and this is just to heavy caliber, thickness
Wall, the manufacture of the straight-line joint submerged arc welding tube of big strain propose challenge higher.
At present, it is domestic that early stage has been carried out to X80 heavy calibers, heavy wall, big strain submerged-arc welded (SAW) pipe
Research, be concentrated mainly on Ф 1422mm calibers routine ERW or Ф 1219mm pipe
The manufacture method of the big strain ERW in footpath, but for Ф 1422mm calibers, should straighten greatly
The manufacture method of seam welded tube is not directed to.Such as number of patent application be 201310147327.7 it is " super
Ф 1422mm calibers, great Bi have been pertained only in the big wall thickness ERW manufacture method of Large Diameter Pipeline "
The manufacture method of thick ERW, does not relate to for big strain welded tube；Number of patent application is
In 201010251848.3 " manufacture method of a kind of high-grade large-strain pipeline steel and steel pipe "
The manufacture method of the big strain ERW of Ф 1219mm caliber 26.2mm wall thickness has been pertained only to,
Do not related to for more than Ф 1422mm calibers, 30mm wall thickness big strain ERW.This
Manufacture method in text can realize the X80 grades of super large caliber of Φ 1422,21.4~30.8mm heavy walls,
The manufacture of big strain ERW, welded tube not only has good mechanical property and physical dimension,
And with good linear deformation ability, it can be ensured that peace of the pipeline under complex geological condition
Full property and integrality.
Super large caliber, big wall thickness, big strain ERW are removed and meet the common ERW of same specification
Technical conditions requirement is outer, in addition it is also necessary to meet following condition：(1) relatively low longitudinal yield tensile ratio requirement；
(2) requirement of longitudinal uniform elongation higher, this is to super large caliber, big heavy wall, should straighten greatly
The manufacture of seam welded tube proposes requirement higher, the present invention is intended to provide a kind of X80 grades of Ф 1422
Super large caliber, heavy wall, the manufacture method of big strain ERW, can be used in manufacture one kind and remove
Outside with good conventional mechanical property, at the same have good longitudinal direction yield strength, yield tensile ratio and
The X80 grades of super large caliber of Ф 1422 of uniform elongation, heavy wall, the vertical masonry joint submerged-arc welding of big strain
Pipe, for the industrial applications of China X80 grades of super large caliber, heavy wall, big strain welded tube are provided
With reference to.
The content of the invention
Provided herein is a kind of X80 grades of super large caliber, heavy wall, big strain straight-line joint submerged arc welding tube system
Method is made, the welded tube manufactured using the method not only has good mechanical property and dimensioning
It is very little, and with good linear deformation ability, it can be ensured that pipeline is under complex geological condition
Security and integrality.
The technical solution used in the present invention is：
A kind of X80 grades of Φ 1422mm straight-line joint submerged arc welding tube manufacture methods, including following operation：
The inspection of steel-plate ultrasound ripple, milling side, pre-flanging, JCO shapings, prewelding, interior weldering, outside weld, weldering
Seam X-ray detection, pipe expanding, hydrostatic test, weld joint ultrasonic detection, pipe end X
Ray detection, chamfered edge, pipe end Magnetic testing, presentation quality inspection, anti-corrosion；
The X80 grades of mass percent of pipe line steel constitutes and is：C:0.05~0.09%, Si：
0.15~0.32%, Mn：1.6~1.90%, S：≤ 0.004%, P：≤ 0.010%, Ni：
0.15~0.40%, Cr：0~0.30%, Cu：0.1~0.3%, Nb：0.025~0.10%, V：
0.02~0.05%, Ti：0.015~0.03%, Mo：0.10~0.35%, Al：0.02~0.06%,
N：≤ 0.008%, B：≤ 0.0005%, balance of Fe.
Using works such as molten iron pretreatment, pneumatic steelmaking, the purifying treatment of whole process, controlled rolling and controlled coolings
Skill, realizes body and is organized as pro-eutectoid ferrite+MA+ granular bainite heterogeneous structures, should
Heterogeneous structure ensure welded tube in addition to intensity and good low-temperature flexibility higher, also with compared with
Body uniform elongation high and linear deformation ability.
JCO moulding process is：Using JCO forming machines first by through the outside steel after longitudinal edge pre-bending
Plate is repeatedly suppressed, and is pressed into " J " shape, then inner side steel plate is repeatedly suppressed, and is pressed into
" C " shape, finally the middle pressing one-time in steel plate steel plate is pressed into " O " shape of opening,
Opening gap is less than 246mm, and small step-length, the work of multi-pass are used in the Sheet Metal Forming Technology
Sequence, for 21.4mm wall thickness steel plates, suppresses number of times >=25 time；It is more than 21.4mm wall thickness thick
Degree steel plate, suppresses number of times >=37 time, it is ensured that the glacing flatness of pipe circularity and welding edge.
Tack welding process is mixed gas arc welding, and wherein gas classification is
CO2(55%~65%)+Ar (35%~45%), welding speed V=3.5~4.5m/min.
Astute and able technique is interior weldering four outside welds, five Lincoln welds, and astute and able inside and outside Welding is：
1# uses DC reverse connection, and 2#, 3#, 4# or 5# is exchange, speed of welding
V=1.4~1.6m/min.
The expanding technology selects suitable step-length lap during expanding, ensure that two
Type quality in expanding overlapping region, and expanding, enlarging rate control is carried out to the full body of steel pipe
Within 0.8%.
The anti-corrosion application temperature should be controlled within 200 DEG C, and at a temperature of 200 DEG C ± 5 DEG C
Insulation 5min.
The welded tube caliber is Φ 1422mm, wall thickness is 21.4~30.8mm.
Using above-mentioned technical proposal, the beneficial effect that the present invention is produced has：
1. by the control of the techniques such as the design of rational alloy and ultra-clean smelting, controlled rolling and controlled cooling,
Realize body and be organized as pro-eutectoid ferrite+MA+ granular bainite heterogeneous structures, it is ensured that be strong
Making welded tube while degree and toughness has body uniform elongation and linear deformation ability higher.
2. the JCO moulding process that the present invention is used be according to the width of steel plate, thickness and
The size of die size, obtains after Accurate Analysis, reasonable selection die size, determination compacting road
It is secondary, so that it is guaranteed that body each position deformation consistent and uniform after shaping.Can using this moulding process
With ensure X80 grades of Φ 1422mm, the straight-line joint submerged arc welding tube that wall thickness is 21.4~30.8mm it is ellipse
Circularity, makes welded tube uniform in the deformation of JCO forming process middle tube bodies part, obtains optimum shape,
Effectively prevent because tube body performance declines serious situation caused by inhomogeneous deformation.
3. using mixed gas arc welding tack welding process can Welded Pipe total length carry out continuous prewelding,
Ensure that the pattern after welded tube forming keeps, it is ensured that the q＆r of weld seam.
4. X80 grades is directed to using the astute and able technique of interior weldering four and outside weld five
Φ 1422mm, the exploitation of 21.4~30.8mm of wall thickness straight-line joint submerged arc welding tubes are formulated.Using interior weldering
Four welding procedures of outside weld five, can reduce the heat input of unit length, reduce heat affecting
The size in area.In the formulation process of welding parameter, the effect of each silk is taken into full account, by closing
Reason sets electric current, voltage, stem elongation, distance between weldingwires and the angle of each silk, excellent to obtain
Weld shape, the transition that weld seam can be smoothed with mother metal, reduces or eliminates undercut, so that finally
Obtain based on acicular ferrite and granular bainite, the weld seam group with excellent mechanical performances
Knit, it is ensured that tube-welding joint obdurability is matched.
5. in described pipe expanding operation, according to shaping, welding after welded tube size,
Situations such as circularity, suitable step-length lap is selected, ensure that outer in two expanding overlapping regions
Form quality amount, good spy is shown using the expanding welded tube of the enlarging rate in pipe end dimensional accuracy
Property, accurate size, circularity is good, and welded tube physical dimension, ovality and welded tube reason has been effectively ensured
Change performance, can be good at carrying out site girth welding docking.
Specific implementation example 1：The big strain ERW manufactures of 1422 × 21.4mm of X80 Φ
(1) raw material, it is the X80 steel plates of 21.4mm to use wall thickness, and its main alloy element contains
Amount：C 0.072%, Si 0.26%, Mn 1.71%, S 0.0029%, P 0.0073%, Ni 0.25%,
Cr 0.24%, Cu 0.13%, Nb 0.079%, V 0.048%, Ti 0.015%, Mo 0.12%,
Al 0.032%, N≤0.008%, B≤0.0005%, balance of Fe.
(2) inspection of steel-plate ultrasound ripple, 100% ultrasound examination is carried out to steel plate.
(3) milling side, groove size is that upper bevel angle is 80 °, and lower bevel angle is 75 °, under
Groove depth 8.2mm, root face 7.0mm.
(4) pre-flanging, edges of boards pre-bending is carried out using prebending machine, edges of boards curvature is met the requirements.
(5) JCO shapings, are first carried out the side of the steel plate after pre-bending 12 times on forming machine
Compacting, into " J " type, then second half of steel plate is suppressed with passage in the same way,
Into " C " type, finally once suppressed in the centre of steel plate, into " O " type of opening,
Opened gap is less than 246mm, co-pressed 25 passage, and single depression amount is 2~4mm.
(6) prewelding, will send into Prewelding machine, adjustment Prewelding machine pressure roller position in the steel pipe of " O " type
Put, connecing mode using mixed gas arc welding is welded, form the pre- of continuous, reliable in quality
Welding line.
(7) weldering, is welded, 1# using four Lincoln weld grooves on the inside of steel pipe in
Using DC reverse connection, 2#, 3#, 4# is exchange.Welding condition is：1# electric current
I=1100A, voltage U=33V；2# electric current I=880A, voltage U=34V；3# electric current
I=700A, voltage U=36V, 4# an electric current I=600A, voltage U=38V, distance between weldingwires
For 18,19,19mm, stem elongation 26,26,26,26mm, welding speed V=1.7m/min.
(8) outside weld, is welded, 1# using four Lincoln weld grooves on the outside of steel pipe
Using DC reverse connection, 2#, 3#, 4# is exchange.Welding condition is：1# electric current
I=1150A, voltage U=34V；2# electric current I=900A, voltage U=36V；3# electric current
I=700A, voltage U=38V, 4# an electric current I=600A, voltage U=40V, distance between weldingwires
For 18,20,20mm, stem elongation 30,30,30,30mm, welding speed V=1.7m/min.
(9) X-ray detection of welding, carries out 100%X and penetrates to the welded tube inner and outer welding after welding
Line is detected.
(10) pipe expanding, Welded Pipe total length carries out 0.8% enlarging rate and carries out expanding, raising weldering
The dimensional accuracy of pipe, while improving the stress distribution of steel pipe.
(11) hydrostatic test, Welded Pipe carries out 95% hydrostatic test, test pressure
15.6MPa, the dwell time is more than 15S.
(12) weld joint ultrasonic detection, is carried out to the welded tube welding seam after welding and both sides heat affected area
100% checks.
(13) pipe end X-ray detection, examines to being made film through the welded pipe end after expanding, hydraulic pressure
Look into, prevent the issuable defect of expanding, hydraulic pressure.
(14) chamfered edge, carries out pipe end slope-mouth process, 22 ° of bevel angle~25 °, root face
0.8~2.4mm.
(15) pipe end Magnetic testing, Welded Pipe pipe end carries out Magnetic testing, and further exclusion can
The defect that can be produced.
(16) anti-corrosion, anti-corrosion application temperature is controlled within 200 DEG C, and in 200 DEG C of ± 5 DEG C of temperature
The lower insulation 5min of degree.
The welded tube performance test results manufactured using process above are as follows：
1. welded tube drafting results are as shown in table 1：
The welded tube Erichsen test result of table 1
2. body impact ductility test result is as shown in table 2：
The welded tube Charpy-type test result of table 2
3. body DWTT result of the tests are as shown in table 3：
The DWTT sections of shear (SA%) of table 3
4. welding point Hardness results are as shown in table 4：
The welding point Hardness results of table 4
Specific implementation example 2：The big strain ERW manufactures of 1422 × 30.8mm of X80 Φ
(1) raw material, it is the X80 steel plates of 30.8mm to use wall thickness, and its main alloy element contains
Amount：C 0.072%, Si 0.26%, Mn 1.71%, S 0.0029%, P 0.0073%, Ni 0.25%,
Cr 0.24%, Cu 0.13%, Nb 0.079%, V 0.048%, Ti 0.015%, Mo 0.12%,
Al 0.032%, N≤0.008%, B≤0.0005%, balance of Fe.
(2) inspection of steel-plate ultrasound ripple, 100% ultrasound examination is carried out to steel plate.
(3) milling side, groove size is that upper bevel angle is 70 °, and lower bevel angle is 70 °, under
Groove depth 11.5mm, root face 10.0mm.
(4) pre-flanging, edges of boards pre-bending is carried out using prebending machine, edges of boards curvature is met the requirements.
(5) JCO shapings, are first carried out the side of the steel plate after pre-bending 18 times on forming machine
Compacting, into " J " type, then second half of steel plate is suppressed with passage in the same way,
Into " C " type, finally once suppressed in the centre of steel plate, into " O " type of opening,
Opened gap is less than 246mm, co-pressed 37 passage, and single depression amount is 2~4mm.
(6) prewelding, will send into Prewelding machine, adjustment Prewelding machine pressure roller position in the steel pipe of " O " type
Put, connecing mode using mixed gas arc welding is welded, form the pre- of continuous, reliable in quality
Welding line.
(7) weldering, is welded, 1# using four Lincoln weld grooves on the inside of steel pipe in
Using DC reverse connection, 2#, 3#, 4# is exchange.Welding condition is：1# electric current
I=1100A, voltage U=34V；2# electric current I=1000A, voltage U=36V；3# electricity
Between stream I=950A, voltage U=38V, a 4# electric current I=900A, voltage U=40V, welding wire
Away from for 18,20,20mm, stem elongation 27,27,27,27mm, welding speed V=1.5m/min.
(8) outside weld, is welded, 1# using four Lincoln weld grooves on the outside of steel pipe
Using DC reverse connection, 2#, 3#, 4#, 5# is exchange.Welding condition is：1# electricity
Stream I=1200A, voltage U=33V；2# electric current I=1100A, voltage U=35V；3#
Electric current I=900A, voltage U=37V, 4# an electric current I=800A, voltage U=39V, 5#
Silk electric current I=700A, voltage U=40V, distance between weldingwires be 17,17,17,17mm, do
Elongation 29,29,29,29,29mm, welding speed V=1.5m/min.
(9) X-ray detection of welding, carries out 100%X and penetrates to the welded tube inner and outer welding after welding
Line is detected.
(10) pipe expanding, Welded Pipe total length carries out 0.8% enlarging rate and carries out expanding, raising weldering
The dimensional accuracy of pipe, while improving the stress distribution of steel pipe.
(11) hydrostatic test, Welded Pipe carries out 95% hydrostatic test, test pressure
22.5MPa, the dwell time is more than 15S.
(12) weld joint ultrasonic detection, is carried out to the welded tube welding seam after welding and both sides heat affected area
100% checks.
(13) pipe end X-ray detection, examines to being made film through the welded pipe end after expanding, hydraulic pressure
Look into, prevent the issuable defect of expanding, hydraulic pressure.
(14) chamfered edge, carries out pipe end slope-mouth process, 22 ° of bevel angle~25 °, root face
0.8~2.4mm.
(15) pipe end Magnetic testing, Welded Pipe pipe end carries out Magnetic testing, and further exclusion can
The defect that can be produced.
(16) anti-corrosion, anti-corrosion application temperature is controlled within 200 DEG C, and in 200 DEG C of ± 5 DEG C of temperature
The lower insulation 5min of degree.
The welded tube performance test results manufactured using process above are as follows：
1. welded tube drafting results are as shown in table 5：
The welded tube Erichsen test result of table 5
2. body impact ductility test result is as shown in table 6：
The welded tube Charpy-type test result of table 6
3. body DWTT result of the tests are as shown in table 7：
The DWTT sections of shear (SA%) of table 7
4. welding point Hardness results are as shown in table 8：
The welding point Hardness results of table 8
Claims (7)
1. a kind of X80 grades of Φ 1422mm straight-line joint submerged arc welding tube manufacture methods, it is characterised in that
Including following operation：The inspection of steel-plate ultrasound ripple, milling side, pre-flanging, JCO shapings, prewelding,
Interior weldering, outside weld, X-ray detection of welding, pipe expanding, hydrostatic test, welding line ultrasonic
Ripple detection, pipe end X-ray detection, chamfered edge, pipe end Magnetic testing, presentation quality inspection,
Anti-corrosion；
The X80 grades of mass percent of pipe line steel constitutes and is：C:0.05~0.09%, Si：
0.15~0.32%, Mn：1.6~1.90%, S：≤ 0.004%, P：≤ 0.010%, Ni：
0.15~0.40%, Cr：0~0.30%, Cu：0.1~0.3%, Nb：0.025~0.10%, V：
0.02~0.05%, Ti：0.015~0.03%, Mo：0.10~0.35%, Al：0.02~0.06%,
N：≤ 0.008%, B：≤ 0.0005%, balance of Fe.
2. a kind of X80 grades of Φ 1422mm straight-line joint submerged arc welding tubes according to claim 1
Manufacture method, it is characterised in that JCO moulding process is：First will be through using JCO forming machines
Outside plate after longitudinal edge pre-bending is repeatedly suppressed, and is pressed into " J " shape, then by inner side steel plate
Repeatedly suppressed, be pressed into " C " shape, finally the middle pressing one-time in steel plate is made steel plate pressure
Into " O " shape of opening, opening gap is less than 246mm, using small in the Sheet Metal Forming Technology
Step-length, the operation of multi-pass, for 21.4mm wall thickness steel plates, suppress number of times >=25 time；
21.4mm wall thickness above thickness steel plates, suppress number of times >=37 time, it is ensured that pipe circularity and weldering
The glacing flatness of edge fit.
3. a kind of X80 grades of Φ 1422mm straight-line joint submerged arc welding tubes according to claim 1
Manufacture method, it is characterised in that tack welding process is mixed gas arc welding, wherein gas classification
It is CO2(55%~65%)+Ar (35%~45%), welding speed V=3.5~4.5m/min.
4. a kind of X80 grades of Φ 1422mm straight-line joint submerged arc welding tubes according to claim 1
Manufacture method, it is characterised in that astute and able technique is interior weldering four outside welds, five Lincoln welds,
Welding is inside and outside astute and able：1# uses DC reverse connection, and 2#, 3#, 4# or 5# is exchange,
Welding speed V=1.4~1.6m/min.
5. a kind of X80 grades of Φ 1422mm straight-line joint submerged arc welding tubes according to claim 1
Manufacture method, it is characterised in that the expanding technology selects suitable step-length during expanding
Lap, ensure that the type quality in two expanding overlapping regions, and the full body of steel pipe is entered
Row is expanding, and enlarging rate is controlled within 0.8%.
6. a kind of X80 grades of Φ 1422mm straight-line joint submerged arc welding tubes according to claim 1
Manufacture method, it is characterised in that the anti-corrosion application temperature should be controlled within 200 DEG C, and
5min is incubated at a temperature of 200 DEG C ± 5 DEG C.
7. a kind of X80 grades of Φ 1422mm straight-line joint submerged arc welding tubes according to claim 1
Manufacture method, it is characterised in that the welded tube caliber is Φ 1422mm, wall thickness is
21.4~30.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510783598.0A CN106694609A (en) | 2015-11-16 | 2015-11-16 | Method for manufacturing X80-stage phi1422 mm longitudinal submerged arc welding pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510783598.0A CN106694609A (en) | 2015-11-16 | 2015-11-16 | Method for manufacturing X80-stage phi1422 mm longitudinal submerged arc welding pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106694609A true CN106694609A (en) | 2017-05-24 |
Family
ID=58931867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510783598.0A Pending CN106694609A (en) | 2015-11-16 | 2015-11-16 | Method for manufacturing X80-stage phi1422 mm longitudinal submerged arc welding pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106694609A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108531814A (en) * | 2018-05-22 | 2018-09-14 | 湖南华菱湘潭钢铁有限公司 | A kind of preparation method of heavy caliber X80 straight-line joint submerged arc welding tubes |
| CN108796364A (en) * | 2018-05-21 | 2018-11-13 | 中国石油天然气集团有限公司 | A kind of X80 heavy caliber thick walls straight-line joint submerged arc welding tube being applicable in low temperature and its manufacturing method |
| CN109487173A (en) * | 2018-11-21 | 2019-03-19 | 天津市华油钢管有限公司 | A kind of corrosion resistant oil transportation spiral submerged welded pipe and preparation method thereof |
| CN111842673A (en) * | 2020-07-22 | 2020-10-30 | 中国石油天然气集团有限公司 | Method for improving geometric dimension precision of pipe body and pipe end of straight welded pipe |
| CN111872645A (en) * | 2020-08-06 | 2020-11-03 | 中国石油天然气集团有限公司 | Manufacturing method of X80 steel grade OD1422mm large-wall-thickness straight welded pipe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006328523A (en) * | 2005-04-26 | 2006-12-07 | Nippon Steel Corp | High strength steel pipe for low temperature use |
| CN101204720A (en) * | 2007-12-10 | 2008-06-25 | 华北石油管理局第一机械厂 | Manufacture method of X80 pipeline JCOE direct sew submerged arc welding tube |
| JP2010126730A (en) * | 2008-11-25 | 2010-06-10 | Jfe Steel Corp | High strength steel having excellent weld heat-affected zone toughness and hic resistance |
| CN101880818A (en) * | 2010-06-04 | 2010-11-10 | 中国石油天然气集团公司 | Preparation method of X80 bent pipe and steel for pipe fittings |
| CN103212952A (en) * | 2013-04-25 | 2013-07-24 | 中国石油集团渤海石油装备制造有限公司 | Manufacturing method of super-large-diameter large-wall thick longitudinal submerged arc welded pipe |
| CN103521550A (en) * | 2013-10-07 | 2014-01-22 | 宝鸡石油钢管有限责任公司 | Manufacturing method of X90 grade pipeline steel large-opening-diameter thick-wall longitudinal submerged-arc welded pipe |
| CN103862243A (en) * | 2014-03-25 | 2014-06-18 | 天津市雪琰管业有限公司 | Method for manufacturing straight-line thermometal composite welded pipe |
-
2015
- 2015-11-16 CN CN201510783598.0A patent/CN106694609A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006328523A (en) * | 2005-04-26 | 2006-12-07 | Nippon Steel Corp | High strength steel pipe for low temperature use |
| CN101204720A (en) * | 2007-12-10 | 2008-06-25 | 华北石油管理局第一机械厂 | Manufacture method of X80 pipeline JCOE direct sew submerged arc welding tube |
| JP2010126730A (en) * | 2008-11-25 | 2010-06-10 | Jfe Steel Corp | High strength steel having excellent weld heat-affected zone toughness and hic resistance |
| CN101880818A (en) * | 2010-06-04 | 2010-11-10 | 中国石油天然气集团公司 | Preparation method of X80 bent pipe and steel for pipe fittings |
| CN103212952A (en) * | 2013-04-25 | 2013-07-24 | 中国石油集团渤海石油装备制造有限公司 | Manufacturing method of super-large-diameter large-wall thick longitudinal submerged arc welded pipe |
| CN103521550A (en) * | 2013-10-07 | 2014-01-22 | 宝鸡石油钢管有限责任公司 | Manufacturing method of X90 grade pipeline steel large-opening-diameter thick-wall longitudinal submerged-arc welded pipe |
| CN103862243A (en) * | 2014-03-25 | 2014-06-18 | 天津市雪琰管业有限公司 | Method for manufacturing straight-line thermometal composite welded pipe |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796364A (en) * | 2018-05-21 | 2018-11-13 | 中国石油天然气集团有限公司 | A kind of X80 heavy caliber thick walls straight-line joint submerged arc welding tube being applicable in low temperature and its manufacturing method |
| CN108796364B (en) * | 2018-05-21 | 2020-07-28 | 中国石油天然气集团有限公司 | X80 large-caliber thick-wall longitudinal submerged arc welded pipe suitable for low temperature and manufacturing method thereof |
| CN108531814A (en) * | 2018-05-22 | 2018-09-14 | 湖南华菱湘潭钢铁有限公司 | A kind of preparation method of heavy caliber X80 straight-line joint submerged arc welding tubes |
| CN108531814B (en) * | 2018-05-22 | 2020-06-12 | 湖南华菱湘潭钢铁有限公司 | Preparation method of large-diameter X80 longitudinal submerged arc welded pipe |
| CN109487173A (en) * | 2018-11-21 | 2019-03-19 | 天津市华油钢管有限公司 | A kind of corrosion resistant oil transportation spiral submerged welded pipe and preparation method thereof |
| CN111842673A (en) * | 2020-07-22 | 2020-10-30 | 中国石油天然气集团有限公司 | Method for improving geometric dimension precision of pipe body and pipe end of straight welded pipe |
| CN111872645A (en) * | 2020-08-06 | 2020-11-03 | 中国石油天然气集团有限公司 | Manufacturing method of X80 steel grade OD1422mm large-wall-thickness straight welded pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103521550B (en) | A kind of X90 level pipe line steel heavy caliber thick wall straight-line joint submerged arc welding tube manufacture method | |
| CN103521549B (en) | A kind of manufacture method of X100 Hi-grade steel heavy caliber thick wall straight-line joint submerged arc welding tube | |
| CN108796364B (en) | X80 large-caliber thick-wall longitudinal submerged arc welded pipe suitable for low temperature and manufacturing method thereof | |
| CN106694609A (en) | Method for manufacturing X80-stage phi1422 mm longitudinal submerged arc welding pipe | |
| CN103540867B (en) | A kind of X80 level straight-line joint submerged arc welding tube of anti-H 2 S stress corrosion and manufacture method thereof | |
| CN102310119B (en) | Manufacturing method of X65 pipeline steel longitudinal submerged arc welded pipe for undersea use | |
| CN103556054B (en) | A kind of high strength medium caliber heavy wall Submarine linepipe and manufacture method thereof | |
| CN101862884B (en) | Pipe-pipe site butt welding method of continuous pipes | |
| CN104089109B (en) | A kind of 625MPa grades of UOE welded tube and its manufacture method | |
| CN102248023A (en) | Method for manufacturing X70 steel-level large deformation-resistant longitudinally submerged arc welding pipe | |
| CN104451440A (en) | High-plasticity longitudinal submerged arc welding tube for X70 thick-wall deep-sea pipeline and manufacturing method of high-plasticity longitudinal submerged arc welding tube | |
| CN102205458B (en) | Manufacturing method for X120 steel-level spiral seam hidden arc welding tube | |
| CN102397941A (en) | Manufacturing method for X90 pipeline steel longitudinal submerged arc welding pipe | |
| CA2940121A1 (en) | Method for producing hot-rolled seamless pipes from transformable steel, in particular for pipelines for deep-water applications, and corresponding pipes | |
| CN105817844A (en) | Manufacturing method for X80 pipeline steel spiral welded pipe | |
| CN104018098B (en) | The X90 pipe line steel of circumferential weld excellent property and production method thereof | |
| CN110000517B (en) | Marine high-strain welded steel pipe based on dual-phase structure and preparation method thereof | |
| CN101745731A (en) | Method for producing N80 ERW oil well casing | |
| CN103194678B (en) | A kind of UOE welded tube and manufacture method thereof | |
| CN106244915B (en) | A kind of think gauge X80 pipe fitting steel pipes of excellent in low temperature toughness and preparation method thereof | |
| CN106540987A (en) | A kind of X80 levels pipe line steel heavy caliber thick wall spiral submerged arc welded pipe manufacturing method | |
| CN102581553A (en) | Large-diameter seamless pipe made of X80-grade high-strength and toughness pipeline steel and method for manufacturing large-diameter seamless pipe | |
| CN105834697A (en) | Manufacturing method of X80 pipeline steel straight welded pipe | |
| CA2522274A1 (en) | Method of manufacturing stainless steel pipe for use in piping systems | |
| CN104831175B (en) | A kind of J55 grade of steels SEW expansion sleeves and its manufacture method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170524 |
|
| RJ01 | Rejection of invention patent application after publication |