CN105499769B - A kind of welding technology of automatic submerged-arc welding suitable for the welding of sulfur resistive process pipe - Google Patents
A kind of welding technology of automatic submerged-arc welding suitable for the welding of sulfur resistive process pipe Download PDFInfo
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- CN105499769B CN105499769B CN201610078514.8A CN201610078514A CN105499769B CN 105499769 B CN105499769 B CN 105499769B CN 201610078514 A CN201610078514 A CN 201610078514A CN 105499769 B CN105499769 B CN 105499769B
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- sulfur resistive
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of welding technology of automatic submerged-arc welding suitable for the welding of sulfur resistive process pipe, it is related to pipeline welding technical field, the present invention combines pipeline feature and carries out pipeline root bead, hot weld using RMD technologies, is filled weldering, cosmetic welding with submerged arc automation, is met from welding material：C≤0.20%；Mn：1.00%~1.50%；S≤0.006%；P≤0.012%, while strict control has been carried out to weld heat input, it is proposed that suitable welding condition.By using the welding procedure of the present invention, pipeline welded joint performance meets anti-H 2 S stress corrosion（SSC）And resistance against hydrogen cracking（HIC）Test requirements document, compared with manual welding, production efficiency improves 2 ~ 3 times, greatly reduces engineering cost.
Description
Technical field
The present invention relates to pipeline welding technical field, more particularly to a kind of submerged arc suitable for the welding of sulfur resistive process pipe
Automatic welding technology.
Background technology
In natural petroleum gas field development, the etching problem of various deleterious acidic media is many oil-gas field developments of puzzlement
One problem.Wherein oil gas field hazardous medium the harm such as installs pipes very mainly based on H2S, CO2 to down-hole casing and oil gas
Greatly.Material corrosion resistance is influenceed by many factors such as chemical composition, manufacture methods in sour environment, this just to set
Standby, Material texture type selecting and welding, the selection of construction technology and control propose higher requirement.Welding point is as in pipeline
Position that is the weakest, most easily triggering accident, harsh performance requirement are an important factor for ensureing construction quality, to grasp and meet acid
Property environmental corrosion requirement Metal Material Welding technology, it is ensured that resistance to corrosion after Metal Material Welding, be to ensure that engineering
The key of construction quality.
The welding of pipeline under the conditions of acid medium, conventional method are to use GTAW root bead+SMAW
Filling, the welding method of capping, its welding efficiency is low, and labor intensity is big, and construction cost is high.
The content of the invention
In view of problem above, it is an object of the invention to for hydrogen sulfide corrosion characteristic, it is pre- that research and development are applied to sulfur resistive tubing
Make the welding technology of automatic submerged-arc welding of construction, it is ensured that welding point meets anti-H 2 S stress corrosion（SSC）And resistance against hydrogen cracking
（HIC）Efficient pipeline welding is realized while performance requirement, improves efficiency of construction, reduces Construction Cost, technical scheme
Including content in detail below：
A kind of welding technology of automatic submerged-arc welding suitable for the welding of sulfur resistive process pipe, it is characterised in that including following step
Suddenly：
A：Sulfur resistive steel pipe blanking：Using cold cutting stock；
B：End face groove makes and group pair：Using band root face double V-groove；
C：Preheated before pipeline welding；
D：Root bead and hot weld：Welding material meets claimed below：C≤0.20%；Mn：1.00%~1.50%；S≤0.006%；P
≤0.012%；
E：Filling weldering and cosmetic welding：Met using automatic submerged-arc welding method and welding material claimed below：C≤0.20%；
Mn：1.00%~1.50%；S≤0.006%；P≤0.012%；The interlayer temperature of filling weldering is controlled at 100 ~ 200 DEG C；
F：Weld seam is heat-treated：Weld seam heat treatment is carried out using electrothermal way, heat treatment parameter is controlled using intelligent temperature control system
It is as follows：(a) programming rate is unlimited during room temperature ~ 300 DEG C；(b) programming rate is not more than 120 DEG C/h at .300 DEG C ~ 635 DEG C；(c)
.635 ± 15 DEG C when be incubated 1h；(d) cooling rate is not more than 100 DEG C/h at .635 DEG C ~ 300 DEG C；(e) less than .300 DEG C it is naturally cold
But.
Further：In stepb, 65 ° ± 5 ° of the bevel angle of end face groove, 0.5 ~ 1.5mm of root face, group is to gap
2.5 ~ 3.5mm, group not should be greater than the 10% of wall thickness, and be no more than 1.6mm to unfitness of butt joint.
Further：In step D, root bead and hot weld use gas shielded arc welding, and protective gas is argon gas and carbon dioxide
Mixed gas.
Further：In step E, the welding parameter of Lincoln weld：Welding current：260~310A；Weldingvoltage：28
~34V；Speed of welding：28~34 cm/min；Weld heat input：1.5~2.2KJ/mm.
Further：In step D, root bead welding uses RMD consumable electrode gas-arc automatic welding method for welding.
Further：In step D, hot weld welding is welded using precision pulse consumable electrode gas-arc automatic welding.
Beneficial effects of the present invention：
The present invention is based on engineering construction requirement, and the characteristics of for oil gas field pipeline, innovative development is a kind of to be applied to sulfur resistive
The welding technology of automatic submerged-arc welding of process pipe welding.Compared with traditional manual welding mode, using technology of automatic submerged arc
Pipe prefabrication is carried out, welding efficiency can improve more than 2 times.
The present invention is according to the weld characteristicses of oil gas field pipeline, preferred weld process combination, using RMD（Deposited metal controls
Technology）Consumable electrode gas-arc automatic welding carries out root bead, ensures pipeline single face welding and double face shaping, optimizes filament（φ1.6mm）Bury
Arc automatic welding technology parameter, strictly controls weld heat input, it is ensured that quality of weld joint.
The characteristics of present invention is directed to sulfur resistive pipeline, strict regulations welding material Composition Control, resists to being unfavorable for welding point
The elemental compositions such as C, Mn, S, P of corrosive nature are limited.Meanwhile with reference to the characteristics of acid medium pipeline welding, it is proposed that
Pipeline weld preheating, interlayer temperature control parameter, the warming and cooling rate, thermostat temperature and constant temperature time of post weld heat treatment are also entered
Strict control is gone.
By above technical measures, the efficient welding construction of sulfur resistive pipeline is realized, having broken can only rely on by hand in the past
Weldering carries out the mode of acid medium pipeline welding, greatly increases production efficiency, realizes the pipe under acid medium environment
Road automatic welding pattern, has filled up domestic blank.By strictly controlling technical process, it is ensured that welding point has excellent synthesis
Mechanical property, indices meet pipeline detail design standard under acid medium, meet anti-H 2 S stress corrosion（SSC）With it is anti-
Hydrogen induced cracking (HIC)（HIC）Performance requirement.
Brief description of the drawings：
Fig. 1 process sequence diagrams；
Fig. 2 is pipe string groove figure；
Fig. 3 is post weld heat treatment curve map.
Embodiment：
The present invention is described in further detail below by specific embodiment and with reference to accompanying drawing：
Fig. 1 shows a kind of welding technology of automatic submerged-arc welding suitable for the welding of sulfur resistive process pipe, comprises the following steps：
A：Sulfur resistive steel pipe blanking：Using machine cuts blanking, cut in the present embodiment using high speed band sawing machine
Material is cut off, avoids the change of the otch mother metal institutional framework caused by gas flame cuttiug；The sulfur resistive that we select in the present embodiment
Steel pipe, meet claimed below（Mass percent）：P≤0.02%；S≤0.01%；Nb≤0.005%；Ti≤0.025%；V≤
0.02%.Carbon equivalent（IIW）≤ 0.42%, steel pipe Charpy（V）Type nick break test, every group of three sample at a temperature of -10 DEG C
Ballistic work should meet AKV >=27J（Average value）, AKV >=21J（It is single）；The highest hardness value of the single reading of hardness test≤
50HV10；
20G sulfur resistive steel pipe of the specification for 273 × 18mm of Φ, its chemical composition and mechanical performance are selected in the present embodiment
Shown in following table：
B：End face groove makes and organized pair：Using band root face double V-groove, it is grouped after completing groove and making, group pair
2.5 ~ 3.5mm of gap, for group to unfitness of butt joint≤1.5mm, group uses RMD to after the completion of（Deposited metal control technology）Consumable electrode gas
Protection semiautomatic welding carries out spot welding and fixed, and spot welding quantity is 3 ~ 4 points, is uniformly distributed in pipe circumference, and spot welding length is 15 ~
25mm；
C：Preheated before pipeline welding：Preheating method using flame heat or intermediate frequency heater heating, preheating temperature be 100 ~
150℃；Heat should avoid hot-spot, preheating width should be each 100mm in weld seam both sides in weld bond both sides and circumferential uniformly progress；
D：Root bead and hot weld：Welding material selects H08MnHICG, and diameter phi 1.2mm, solder flux is sintered flux
SJ613HIC, welding material meet claimed below（Mass percent）：C≤0.20%；Mn：1.00%~1.50%；S≤0.006%；P
≤0.012%；Solder flux 350 DEG C of drying temperature, is incubated 1h using preceding being dried；
E：Filling weldering and cosmetic welding：Filling weldering, cover welding use automatic submerged-arc welding method, fill the interlayer temperature control of weldering
System is at 100 ~ 200 DEG C；Solder flux is sintered flux SJ613HIC, and welding material selects welding wire for submerged-arc welding H08MnHIC, diameter phi
1.6mm, welding material meet claimed below（Mass percent）：C≤0.20%；Mn：1.00%~1.50%；S≤0.006%；P≤
0.012%；Solder flux 350 DEG C of drying temperature, is incubated 1h using preceding being dried.Welding parameter is：Welding current：260~310A；
Weldingvoltage：28~34V；Speed of welding：28~34 cm/min；Weld heat input：1.5~2.2KJ/mm；When individual layer weld width
It should be welded during more than 15mm using multi-pass welding, electric power polarity is DC reverse connection.
F：Weld seam is heat-treated：Weld seam heat treatment is carried out using electrothermal way, Equipment for Heating Processing is controlled by intelligent temperature control system
Heat treatment parameter is as follows：(a) programming rate is unlimited during room temperature ~ 300 DEG C；(b) programming rate is not more than at .300 DEG C ~ 635 DEG C
120℃/h；(c) 1h is incubated during .635 ± 15 DEG C；(d) cooling rate cannot be greater than 100 DEG C/h at .635 DEG C ~ 300 DEG C；(e)
DEG C .300 natural cooling below；For the curve of cooling as shown in figure 3, abscissa is time shaft, unit is hour（h）, ordinate is
Temperature, degrees Celsius（℃）.
Further：As shown in Fig. 2 in stepb, 65 ° ± 5 ° of the size of the bevel angle 2 of end face groove, i.e. both sides
The double V-groove angle that is formed of pipeline 1 between 60 ° to 70 °, 0.5 ~ 1.5mm of length range of root face 3, group is big to gap 4
Small is 2.5 ~ 3.5mm, and group not should be greater than the 10% of wall thickness, and must not exceed 1.6mm to unfitness of butt joint.
Further：In step D, root bead and hot weld use gas shielded arc welding, and protective gas mixes for 80%Ar+20%CO2
Close gas, 20 ~ 25L/min of gas flow.
Further：In step D, root bead welding uses RMD（Deposited metal control technology）Consumable electrode gas-arc is certainly
Dynamic welding method, welding parameter：Striking current：200A；Welding current：150~180A；Arcing voltage：55V；Weldingvoltage：
14~16V；The amplitude of oscillation：8mm；The left residence time：0.15S；The right residence time：0.15S；Speed of welding：15~20cm/min；Sealing wire
Energy：0.8~1.1KJ/mm.
Further：In step D, hot weld welding is welded using precision pulse consumable electrode gas-arc automatic welding, welding
Parameter：Striking current：220A；Welding current：170~190A；Arcing voltage：50V；Weldingvoltage：22~25V；The amplitude of oscillation：15mm；
The left residence time：0.20S；The right residence time：0.20S；Speed of welding：20~25cm/min；Weld heat input：0.9~1.4KJ/
mm。
After the completion of welding, visual examination of weld is carried out：Face of weld width：It is wider 0.5 ~ 2.0mm than outer surface groove per side,
Weld reinforcement≤2.0mm；Non-Destructive Testing：By existing professional standard《Petroleum gas steel pipe Non-Destructive Testing》SY/T 4109
Regulation carry out, no excessive defect；Property of welded joint is examined：Determine test sample, measure by SY/T 0452-2012 standard gauges
Stretching, bending property, and impact test, hardness test detection are carried out according to relevant criterion, according to NACE TM 0284, NACE
The standards of TM 0177 carry out hic resistance and anti-SSC experiments respectively.
The characteristics of present invention is directed to sulfur resistive pipeline, strict regulations welding material composition, from retaining wall on slope, the system of welding parameter
The fixed whole welding process to filling cosmetic welding carries out strict control, it is proposed that pipeline weld preheating, interlayer temperature control ginseng
Number, strict regulation has also been carried out to the warming and cooling rate, thermostat temperature and constant temperature time of post weld heat treatment.For process pipe
The characteristics of welding, using RMD（Deposited metal control technology）Consumable electrode gas-arc automatic welding root bead and hot weld, Lincoln weld
The group technology of cosmetic welding is filled, has been found out suitable for the thick Lincoln weld parameter of pipe with small pipe diameter, thin-walled.Pass through the above
Technical measures, the efficient welding construction of sulfur resistive pipeline is realized, having broken can only rely on manual welding to carry out acid medium pipe in the past
The mode of road welding, greatly increases production efficiency, realizes the pipeline automatic welding pattern under acid medium environment, fill up
Domestic blank.The welding point being welded using the present invention has excellent comprehensive mechanical property and decay resistance.
The preferred embodiment of the present invention is the foregoing is only, is not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (3)
1. a kind of welding technology of automatic submerged-arc welding suitable for the welding of sulfur resistive process pipe, it is characterised in that comprise the following steps：
A：Sulfur resistive steel pipe blanking：Using cold cutting stock；
B：End face groove makes and group pair：Using band root face double V-groove；
65 ° ± 5 °, 0.5 ~ 1.5mm of root face of the bevel angle of the end face groove, group to 2.5 ~ 3.5mm of gap, group to unfitness of butt joint,
The 10% of wall thickness is not should be greater than, and is no more than 1.6mm；
C：Preheated before pipeline welding；
D：Root bead and hot weld：Welding material meets claimed below：C≤0.20%；Mn：1.00%~1.50%；S≤0.006%；P≤
0.012%；
The root bead and hot weld use gas shielded arc welding, and protective gas is the mixed gas of argon gas and carbon dioxide；
E：Filling weldering and cosmetic welding：Met using automatic submerged-arc welding method and welding material claimed below：C≤0.20%；Mn：
1.00%~1.50%；S≤0.006%；P≤0.012%；The interlayer temperature of filling weldering is controlled at 100 ~ 200 DEG C；
The welding parameter of the Lincoln weld：Welding current：260~310A；Weldingvoltage：28~34V；Speed of welding：28~34
cm/min；Weld heat input：1.5~2.2KJ/mm；
F：Weld seam is heat-treated：Weld seam heat treatment is carried out using electrothermal way, controls heat treatment parameter as follows using intelligent temperature control system：
(a) programming rate is unlimited during room temperature ~ 300 DEG C；(b) programming rate is not more than 120 DEG C/h at .300 DEG C ~ 635 DEG C；(c).635±
1h is incubated at 15 DEG C；(d) cooling rate is not more than 100 DEG C/h at .635 DEG C ~ 300 DEG C；(e) less than .300 DEG C natural cooling.
2. the welding technology of automatic submerged-arc welding according to claim 1 suitable for the welding of sulfur resistive process pipe, its feature exists
In：In step D, root bead welding uses RMD consumable electrode gas-arc automatic welding method for welding.
3. the welding technology of automatic submerged-arc welding according to claim 1 suitable for the welding of sulfur resistive process pipe, its feature exists
In：In step D, hot weld welding is welded using precision pulse consumable electrode gas-arc automatic welding.
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| CN201610078514.8A CN105499769B (en) | 2016-02-04 | 2016-02-04 | A kind of welding technology of automatic submerged-arc welding suitable for the welding of sulfur resistive process pipe |
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| CN201610078514.8A CN105499769B (en) | 2016-02-04 | 2016-02-04 | A kind of welding technology of automatic submerged-arc welding suitable for the welding of sulfur resistive process pipe |
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| CN105772971A (en) * | 2016-04-28 | 2016-07-20 | 西南石油大学 | Welding technology of high sour gas field conveying pipeline |
| CN112658437A (en) * | 2020-12-17 | 2021-04-16 | 建湖县永维阀门钻件有限公司 | Welding process of marine drilling riser |
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