CN103170815A - Welding process of boss of hydrogenation reactor - Google Patents
Welding process of boss of hydrogenation reactor Download PDFInfo
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- CN103170815A CN103170815A CN2013101291103A CN201310129110A CN103170815A CN 103170815 A CN103170815 A CN 103170815A CN 2013101291103 A CN2013101291103 A CN 2013101291103A CN 201310129110 A CN201310129110 A CN 201310129110A CN 103170815 A CN103170815 A CN 103170815A
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Abstract
The invention relates to a welding process of a boss of a hydrogenation reactor. A port in one end of a cylindrical shell section is processed flatly after coiling, circle checking and flaw detection of the cylindrical shell section are qualified; and then a surfacing position of the boss is marked, and thus the trouble that a cylinder body is firstly leveled and then overturned for surfacing the boss when the boss is surfaced is avoided, the leveling procedure during processing of the boss is avoided, therefore the production time is saved, the levelness of the boss is ensured, and the purpose of ensuring the welding quality of the boss is achieved.
Description
Technical field
The present invention relates to the welding procedure of pressure vessel internals in field of petrochemical industrial, relate in particular to the welding procedure of hydrogenation reactor boss.
Background technology
Hydrogenation reactor is the key equipment of modern petroleum refining industry, this equipment be mainly used in petroleum refining, mink cell focus hydrocracking, hydrofinishing and catalytic reforming, desulfurization, remove the technical process such as heavy metal.Along with the future development of petroleum industry equipment to automation, maximization, the size of hydrogenation reactor used is also more and more large.In large-scale hydrogenation reactor and similar pressure vessel and equipment, in order to support heavier internals (as grid, distribution plate etc.), majority need to be at the cylinder inboard wall built-up welding boss of hydrogenation reactor.
Thereby the levelness of boss and present position can affect the reaction effect that the distribution situation of material has influence on hydrogenation reactor, and boss also will reach required antiseptic effect, and therefore the welding procedure of boss is also vital in the hydrogenation reactor manufacture process.
Long to the time of hydrogenation reactor cylindrical shell levelling capturing in existing boss welding procedure, accuracy is low, thereby affect the quality of boss welding, to such an extent as to finally have influence on the quality of hydrogenation reactor.
Summary of the invention
A kind of energy shortens the time to hydrogenation reactor cylindrical shell levelling capturing, the levelness of assurance boss reach the welding procedure of the hydrogenation reactor boss of increasing work efficiency, guarantee the boss welding quality thereby technical problem to be solved by this invention is to provide.
For addressing the above problem, the welding procedure of hydrogenation reactor boss of the present invention comprises the following steps:
(1) shell ring rolls the school and justifies and detect a flaw an end port processing of shell ring is smooth after qualified, treat overlaying surface (treating built-up welding lug boss position and both sides) having processed built-up welding position and the polishing that port side marks boss away from shell ring, make and treat that overlaying surface meets flaw detection and requires and it is carried out dimensional gaughing, then treat the built-up welding surface and carry out cylindrical shell basic unit that 100% MT detected, treated built-up welding surface and both sides and carry out 100% UT and detect, make testing result reach the requirement of relevant criterion and file;
(2) built-up welding of boss: first carry out preheating, then weld with Lincoln weld again after two-layer with the SMAW backing welding, built-up welding a to half that requires height carries out Stress relieving annealing, continues built-up welding after annealing, carries out one time Stress relieving annealing after built-up welding is complete again;
(3) processing of boss: will process the shell ring port and be positioned over vertical lathe workbench down, with vertical lathe processing boss, it is of the required size by the figure paper size, then reconditioning boss surface is undressed to the zone it is met after drawing requirement boss surface and both sides thereof are carried out 100% MT detects and 100% UT detection, make testing result reach the requirement of relevant criterion and file;
(4) built-up welding of boss surface stainless steel anticorrosion layer: first carry out preheating, with SMAW built-up welding anticorrosion layer, then with vertical lathe processing anticorrosion layer surface, it is of the required size, at last 100%PT is carried out on the anticorrosion layer surface and detect, anticorrosion layer is carried out 100%UT detect, make testing result reach the requirement of relevant criterion and file.
Both sides in described step (1) are in each 200mm scope of both sides.
Both sides in described step (3) are in each 50mm scope of both sides.
In described step (4), the built-up welding of boss surface stainless steel anticorrosion layer can be double-deck built-up welding, and its technique comprises following two steps:
A. the transition zone of built-up welding anticorrosion layer: first carry out preheating, with 1 ~ 2 layer of SMAW, repair reconditioning transition zone surface after overlaying surface through disappear hydrogen, polishing of stove outward, carry out at last 100%PT and detect, make testing result reach the requirement of relevant criterion and file;
B. the top layer of built-up welding anticorrosion layer: the top layer of built-up welding anticorrosion layer on transition zone, make the gross thickness on transition zone and top layer meet the requirements of thickness, with vertical lathe processing surface part, it is of the required size by the figure paper size through the ferrite number of surveying the top layer, after doing chemical composition analysis and verifying ferrite number, then reconditioning top layer surface undressed to the zone it is met carry out that 100% PT detects and 100% UT detection after drawing requirement, make testing result reach the requirement of relevant criterion and file.
The present invention compared with prior art has the following advantages:
1, the present invention rolls the school at shell ring and justifies and detect a flaw an end port processing of shell ring is smooth after qualified, then processing away from shell ring the line that port side is carried out boss built-up welding position, first cylindrical shell is carried out levelling capturing and then the upset cylindrical shell trouble of carrying out the boss built-up welding when so not only having avoided the built-up welding boss, and avoided adding at boss the levelling operation in man-hour, thereby saved the production time, guaranteed the levelness of boss, reached the purpose that guarantees the boss welding quality.
2, the present invention's 1 ~ 2 layer of transition zone built-up welding in the double-deck bead-welding technology of boss surface stainless steel anticorrosion layer, its thickness is less than the thickness in existing technique, simultaneously have to increase the effective thickness on top layer for the gross thickness that guarantees anticorrosion layer, thereby not only weakened the mother metal dilution, reduced the generation of surface stress but also increased the anti-corrosion capability of boss.
3, the present invention omits after the transition zone built-up welding and (that is: will process the shell ring port and be positioned over vertical lathe workbench down its manufacturing procedure of carrying out because of the transition zone surface irregularity, processing transition zone surface is to satisfying drawing requirement, after processing with shell ring from turning after vertical lathe workbench unloads to the polishing station; At last, the reconditioning vertical lathe is undressed to the R position meet drawing requirement), through facts have proved, as long as transition zone is not in thin especially situation, not only can not affect the welding quality on top layer, but also can reach the purpose that shortens the production time, increases work efficiency.
The specific embodiment
Embodiment 1 comprises the following steps take material 2.25Cr-1Mo, thickness as 144mm, internal diameter as the 4200mm cylindrical shell as example:
(1) shell ring rolls the school and justifies and detect a flaw an end port processing of shell ring is smooth after qualified, port side marks the position for the treatment of the built-up welding boss and overlaying surface (treating each 200mm scope of built-up welding lug boss position and both sides) is treated in polishing having processed away from shell ring, make and treat that overlaying surface meets the flaw detection requirement, and carry out dimensional gaughing; Then treat the built-up welding surface and carry out 100%MT and detect, press in JB/T4730.4-2005 the I level qualified, treat cylindrical shell basic unit in built-up welding surface and each 200mm scope of both sides by SA578 and carry out 100%UT and scan, the C level is qualified;
(2) the Cr-Mo steel part of built-up welding boss: be at first to carry out preheating, preheat temperature 〉=160 ℃, CM-A106N SMAW backing welding with 5mm is two-layer, and then weld with Lincoln weld, built-up welding a to half that requires height carries out continuing built-up welding after Stress relieving annealing, carry out one time Stress relieving annealing after built-up welding is complete again, guarantee during built-up welding that interlayer temperature is 160 ~ 250 ℃, postheat temperature and time are 300 ~ 350 ℃ * 2h;
(3) processing of boss Cr-Mo steel part: will process the shell ring port and be positioned over vertical lathe workbench down, press drawing dimensioned boss Cr-Mo steel part, guarantee boss height but internal diameter must not be less than 4080mm, check processing dimension, then reconditioning boss surface is undressed to the zone make it meet drawing requirement, detect carrying out 100%MT in boss surface and each 50mm scope of both sides thereof, press in JB/T4730.4-2005 the I level qualified, to boss and fusion face thereof, carrying out 100%UT in each 50mm scope of boss both sides detects, press in JB/T4730.3-2005 the I level qualified,
(4) built-up welding of boss surface stainless steel anticorrosion layer: first carry out preheating, with SMAW built-up welding anticorrosion layer, then with vertical lathe processing anticorrosion layer surface, it is of the required size, at last the anticorrosion layer surface is carried out that 100%PT detects, anticorrosion layer carries out 100%UT and detects, make testing result reach the requirement of relevant criterion and file.
The built-up welding of boss surface stainless steel anticorrosion layer can be double-deck built-up welding, and its technique comprises following two steps:
A. the transition zone of built-up welding anticorrosion layer: first carry out preheating, with 1 ~ 2 layer of SMAW, repair reconditioning transition zone surface after overlaying surface through disappear hydrogen, polishing of stove outward, carry out at last 100%PT and detect, make testing result reach the requirement of relevant criterion and file;
B. the top layer of built-up welding anticorrosion layer: the top layer of built-up welding anticorrosion layer on transition zone, make the gross thickness on transition zone and top layer meet the requirements of thickness, with vertical lathe processing surface part, it is of the required size by the figure paper size through the ferrite number of surveying the top layer, after doing chemical composition analysis and verifying ferrite number, then reconditioning top layer surface undressed to the zone it is met carry out that 100% PT detects and 100% UT detection after drawing requirement, make testing result reach the requirement of relevant criterion and file.
Embodiment 2 comprises the following steps take material 2.25Cr-1Mo-0.25V, thickness as 122mm, internal diameter as the 2000mm cylindrical shell as example:
(1) shell ring rolls the school and justifies and detect a flaw an end port processing of shell ring is smooth after qualified, port side marks the position for the treatment of the built-up welding boss and overlaying surface (treating each 200mm scope of built-up welding lug boss position and both sides) is treated in polishing having processed away from shell ring, make and treat that overlaying surface meets the flaw detection requirement, and carry out dimensional gaughing; Then treat the built-up welding surface and carry out 100%MT and detect, press in JB/T4730.4-2005 the I level qualified, treat cylindrical shell basic unit in built-up welding surface and each 200mm scope of both sides by JB/T4730 and carry out 100%UT and scan, the I level is qualified;
(2) the Cr-Mo-V steel part of built-up welding boss: be at first to carry out preheating, preheat temperature 〉=180 ℃, CM-A106HD SMAW backing welding with 5mm is two-layer, and then weld with Lincoln weld, built-up welding a to half that requires height carries out continuing built-up welding after Stress relieving annealing, carry out one time Stress relieving annealing after built-up welding is complete again, guarantee during built-up welding that interlayer temperature is 180 ~ 250 ℃, postheat temperature and time are 350 ~ 400 ℃ * 2h;
(3) processing of boss Cr-Mo-V steel part: will process the shell ring port and be positioned over vertical lathe workbench down, press drawing dimensioned boss Cr-Mo-V steel part, guarantee boss height, the inspection processing dimension meets the requirements, then reconditioning boss surface is undressed to the zone make it meet drawing requirement, detect carrying out 100%MT in boss surface and each 50mm scope of both sides thereof, press in JB/T4730.4-2005 the I level qualified, detect carrying out 100%UT in each 50mm scope of boss and fusion face thereof, boss both sides, press in JB/T4730.3-2005 the I level qualified.
(4) built-up welding of boss surface stainless steel anticorrosion layer: first carry out preheating, with SMAW built-up welding anticorrosion layer, then with vertical lathe processing anticorrosion layer surface, it is of the required size, at last the anticorrosion layer surface is carried out that 100%PT detects, anticorrosion layer carries out 100%UT and detects, make testing result reach the requirement of relevant criterion and file.
The technique of the double-deck built-up welding of boss surface stainless steel anticorrosion layer is in the same manner as in Example 1.
Claims (4)
1. the welding procedure of hydrogenation reactor boss, it is characterized in that: this technique comprises the following steps:
(1) shell ring rolls the school and justifies and detect a flaw an end port processing of shell ring is smooth after qualified, treat overlaying surface (treating built-up welding lug boss position and both sides) having processed built-up welding position and the polishing that port side marks boss away from shell ring, make and treat that overlaying surface meets flaw detection and requires and it is carried out dimensional gaughing, then treat the built-up welding surface and carry out cylindrical shell basic unit that 100% MT detected, treated built-up welding surface and both sides and carry out 100% UT and detect, make testing result reach the requirement of relevant criterion and file;
(2) built-up welding of boss: first carry out preheating, then weld with Lincoln weld again after two-layer with the SMAW backing welding, built-up welding a to half that requires height carries out Stress relieving annealing, continues built-up welding after annealing, carries out one time Stress relieving annealing after built-up welding is complete again;
(3) processing of boss: will process the shell ring port and be positioned over vertical lathe workbench down, with vertical lathe processing boss, it is of the required size by the figure paper size, then reconditioning boss surface is undressed to the zone it is met after drawing requirement boss surface and both sides thereof are carried out 100% MT detects and 100% UT detection, make testing result reach the requirement of relevant criterion and file;
(4) built-up welding of boss surface stainless steel anticorrosion layer: first carry out preheating, with SMAW built-up welding anticorrosion layer, then with vertical lathe processing anticorrosion layer surface, it is of the required size, at last 100%PT is carried out on the anticorrosion layer surface and detect, anticorrosion layer is carried out 100%UT detect, make testing result reach the requirement of relevant criterion and file.
2. the welding procedure of hydrogenation reactor boss as claimed in claim 1, it is characterized in that: the both sides in described step (1) are in each 200mm scope of both sides.
3. the welding procedure of hydrogenation reactor boss as claimed in claim 1, it is characterized in that: the both sides in described step (3) are in each 50mm scope of both sides.
4. the welding procedure of hydrogenation reactor boss as claimed in claim 1 is characterized in that: in described step (4), the built-up welding of boss surface stainless steel anticorrosion layer can be double-deck built-up welding, and its technique comprises following two steps:
A. the transition zone of built-up welding anticorrosion layer: first carry out preheating, with 1 ~ 2 layer of SMAW, through stove disappear outward hydrogen, polishing repair reconditioning transition zone surface after overlaying surface undressed to the zone make it meet drawing requirement, carry out at last 100%PT and detect, make testing result reach the requirement of relevant criterion and file;
B. the top layer of built-up welding anticorrosion layer: the top layer of built-up welding anticorrosion layer on transition zone, make the gross thickness on transition zone and top layer meet the requirements of thickness, with vertical lathe processing surface part, it is of the required size by the figure paper size through the ferrite number of surveying the top layer, after doing chemical composition analysis and verifying ferrite number, then reconditioning top layer surface undressed to the zone it is met carry out that 100% PT detects and 100% UT detection after drawing requirement, make testing result reach the requirement of relevant criterion and file.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310129110.3A CN103170815B (en) | 2013-04-15 | 2013-04-15 | Welding process of boss of hydrogenation reactor |
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| CN201310129110.3A CN103170815B (en) | 2013-04-15 | 2013-04-15 | Welding process of boss of hydrogenation reactor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104526167A (en) * | 2014-11-04 | 2015-04-22 | 南方增材科技有限公司 | Electric smelting forming method of hydrogenation reactor barrel |
| CN107470744A (en) * | 2017-08-25 | 2017-12-15 | 上海电气核电设备有限公司 | A kind of welding method that can effectively prevent different alloys interface peel |
| CN109759802A (en) * | 2019-03-28 | 2019-05-17 | 二重（德阳）重型装备有限公司 | The support rim processing method of pressure vessel shell ring |
| CN110814478A (en) * | 2019-11-26 | 2020-02-21 | 二重（德阳）重型装备有限公司 | Overlaying welding manufacturing method for lug boss of hydrogenation reactor made of vanadium steel |
| CN114769795A (en) * | 2022-04-22 | 2022-07-22 | 中国石油大学(华东) | Step current surfacing method for boss of hydrogenation reactor based on welding residual stress regulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104526167A (en) * | 2014-11-04 | 2015-04-22 | 南方增材科技有限公司 | Electric smelting forming method of hydrogenation reactor barrel |
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| CN107470744A (en) * | 2017-08-25 | 2017-12-15 | 上海电气核电设备有限公司 | A kind of welding method that can effectively prevent different alloys interface peel |
| CN107470744B (en) * | 2017-08-25 | 2019-12-10 | 上海电气核电设备有限公司 | Welding method capable of effectively preventing dissimilar alloy interface from peeling |
| CN109759802A (en) * | 2019-03-28 | 2019-05-17 | 二重（德阳）重型装备有限公司 | The support rim processing method of pressure vessel shell ring |
| CN110814478A (en) * | 2019-11-26 | 2020-02-21 | 二重（德阳）重型装备有限公司 | Overlaying welding manufacturing method for lug boss of hydrogenation reactor made of vanadium steel |
| CN110814478B (en) * | 2019-11-26 | 2020-12-22 | 二重（德阳）重型装备有限公司 | Overlaying welding manufacturing method for lug boss of hydrogenation reactor made of vanadium steel |
| CN114769795A (en) * | 2022-04-22 | 2022-07-22 | 中国石油大学(华东) | Step current surfacing method for boss of hydrogenation reactor based on welding residual stress regulation |
| CN114769795B (en) * | 2022-04-22 | 2023-05-16 | 中国石油大学(华东) | Hydrogenation reactor boss gradient current surfacing method based on welding residual stress regulation and control |
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