CN105698003A - Application of steel plate, forge piece and welding rod to manufacture of propylene spherical tank, and preparation method of propylene spherical tank - Google Patents
Application of steel plate, forge piece and welding rod to manufacture of propylene spherical tank, and preparation method of propylene spherical tank Download PDFInfo
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Abstract
The present invention relates to application of a steel plate, a forge piece and a welding rod to the manufacture of a propylene spherical tank. The steel plate is 07MnNiMoVDR (B610CF-L2) steel plate, the forge piece is 08MnNiCrMoVD forge piece with withstand temperature of -50 DEG C; and the welding rod is LB-65L welding rod. The invention also relates to a preparation method of a propylene spherical tank, and a propylene spherical tank prepared by the method. The invention employs 07MnNiMoVDR (B610CF-L2) steel plate, 08MnNiCrMoVD forge piece with withstand temperature of -50 DEG C and LB-65L welding rod to prepare the propylene spherical tank with volume of 2000-3000 m<3>, wall thickness of 44-50 mm, withstand temperature of -45 to -50 DEG C and low temperature tolerance pressure of 2-3 MPa.
Description
Technical field
The present invention relates to the application in preparing Propylene Spherical Tanks of a kind of steel plate, forging and welding rod and the preparation method of a kind of Propylene Spherical Tanks。
Background technology
Along with the construction successively of Chinese large-sized propylene unit, for reducing floor space, reducing investment outlay, shorten the construction period, domestic each petro-chemical corporation is day by day urgent to the production domesticization demand of the key equipment-large-scale low-temperature Propylene Spherical Tanks of this device。Being-45～-50 DEG C of large-scale Propylene Spherical Tanks as design temperature, China relies primarily on Introduced From Abroad ball sheet or steel plate for a long time, and adopt external welding rod, manufacturing process, technology to require and corresponding manufacture, installation and acceptance specification is built。From the nineties beginning in last century, though China has part 07MnNiMoVDR steel cryogenic Propylene Spherical Tanks to achieve production domesticization, but the maximum nominal volume of the 07MnNiMoVDR steel cryogenic Propylene Spherical Tanks that can domesticize completely at present is 2000m3, design pressure be 2.0MPa～2.2MPa, and design temperature is only-30～-40 DEG C。In recent years, along with China's Propylene Spherical Tanks is built to (the nominal volume 2000m that maximizes3And 2000m3Above) and lower use temperature (design temperature is low to moderate-45 DEG C～-50 DEG C, design pressure is 2.2MPa) development in direction, the requirement of the materials such as steel plate used in Propylene Spherical Tanks, welding rod and forging is also more and more higher, it is necessary to more resistant to low temperature, the better material of solderability for the preparation of Propylene Spherical Tanks。
Therefore, a kind of steel plate, welding rod and forging that be capable of withstanding low temperature, that solderability is good now it are badly in need of for preparing low temperature Propylene Spherical Tanks。
Summary of the invention
The invention aims to overcome the defect that material is not low temperature resistant, solderability is poor preparing Propylene Spherical Tanks in prior art, the application in preparing Propylene Spherical Tanks of a kind of steel plate, forging and welding rod, Propylene Spherical Tanks prepared by the preparation method of a kind of Propylene Spherical Tanks and the method are provided。
The present inventor finds under study for action, 07MnNiMoVDR (B610CF-L2) steel plate and 08MnNiCrMoVD forging that tolerable temperature is-50 DEG C and LB-65L welding rod are for preparing Propylene Spherical Tanks, it is possible to significantly improve lower temperature resistance and the crushing resistance of Propylene Spherical Tanks。
Therefore, to achieve these goals, on the one hand, the invention provides the application in preparing Propylene Spherical Tanks of a kind of steel plate, forging and welding rod, described steel plate is 07MnNiMoVDR (B610CF-L2) steel plate, described forging is tolerable temperature is the 08MnNiCrMoVD forging of-50 DEG C, and described welding rod is LB-65L welding rod。
On the other hand, the preparation method that present invention also offers a kind of Propylene Spherical Tanks, this preparation method includes: be pressed by steel plate, obtain Spherical Tank Shell Plates, then Spherical Tank Shell Plates is carried out retaining wall on slope, obtain the Spherical Tank Shell Plates through retaining wall on slope, welding rod is adopted the Spherical Tank Shell Plates through retaining wall on slope to be welded again, obtain the Propylene Spherical Tanks semi-finished product with upper manhole and lower manhole, welding rod is finally adopted to be welded on by forging in the half-finished upper manhole of spherical tank and lower manhole, wherein, described steel plate is 07MnNiMoVDR (B610CF-L2) steel plate, described forging is tolerable temperature is the 08MnNiCrMoVD forging of-50 DEG C, described welding rod is LB-65L welding rod。
The third aspect, present invention also offers Propylene Spherical Tanks prepared by said method。
In the present invention, Propylene Spherical Tanks prepared by the 08MnNiCrMoVD forging, the LB-65L welding rod that adopt 07MnNiMoVDR (B610CF-L2) steel plate, tolerable temperature to be-50 DEG C, and can prepare volume is 2000-3000m3, wall thickness is 44-50mm, and tolerable temperature is-45～-50 DEG C, and proof pressure is the low temperature resistant Propylene Spherical Tanks of 2-3MPa。
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently。
Detailed description of the invention
Hereinafter the specific embodiment of the present invention is described in detail。It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention。
The invention provides the application in preparing Propylene Spherical Tanks of a kind of steel plate, forging and welding rod, described steel plate is 07MnNiMoVDR (B610CF-L2) steel plate, described forging is tolerable temperature is the 08MnNiCrMoVD forging of-50 DEG C, and described welding rod is LB-65L welding rod。
According to application of the present invention, wherein, as long as described steel plate is 07MnNiMoVDR (B610CF-L2) steel plate, described forging is tolerable temperature is the 08MnNiCrMoVD forging of-50 DEG C, described welding rod is LB-65L welding rod, can improve lower temperature resistance and the crushing resistance of Propylene Spherical Tanks, but, preferably, the yield strength R of described steel plateeL>=490MPa, tensile strength Rm>=610MPa, steel plate is 1/4 position sampling laterally :-50 DEG C of Charpy-V impact power KV2>=100J, it is more preferred to, the yield strength R of described steel plateeLFor 500-700MPa, tensile strength RmFor 610-730MPa, steel plate is 1/4 position sampling laterally :-50 DEG C of Charpy-V impact power KV2For 100-300J, it is possible to improve lower temperature resistance and the crushing resistance of Propylene Spherical Tanks further。
According to application of the present invention, wherein, as long as described forging is the 08MnNiCrMoVD forging that tolerable temperature is-50 DEG C, but, it may be preferable that the yield strength R of described forgingeL>=480MPa, tensile strength Rm>=600MPa ,-50 DEG C of Charpy-V impact power KV2>=60J, it is more preferred to, the yield strength R of described forgingeLFor 500-700MPa, tensile strength RmFor 600-770MPa ,-50 DEG C of Charpy-V impact power KV2For 60-80J, it is possible to improve lower temperature resistance and the crushing resistance of Propylene Spherical Tanks further。
On the other hand, the preparation method that present invention also offers a kind of Propylene Spherical Tanks, it is characterized in that, this preparation method includes: be pressed by steel plate, obtain Spherical Tank Shell Plates, then Spherical Tank Shell Plates is carried out retaining wall on slope, obtain the Spherical Tank Shell Plates through retaining wall on slope, welding rod is adopted the Spherical Tank Shell Plates through retaining wall on slope to be welded again, obtain the Propylene Spherical Tanks semi-finished product with upper manhole and lower manhole, welding rod is finally adopted to be welded on by forging in the half-finished upper manhole of spherical tank and lower manhole, wherein, described steel plate is 07MnNiMoVDR (B610CF-L2) steel plate, described forging is tolerable temperature is the 08MnNiCrMoVD forging of-50 DEG C, described welding rod is LB-65L welding rod。
The present inventor finds under study for action, prepare in the process of Propylene Spherical Tanks, the steel plate of preparation Spherical Tank Shell Plates adopts 07MnNiMoVDR (B610CF-L2) steel plate, the welding rod employing LB-65L welding rod that welding is used, the 08MnNiCrMoVD forging that forging adopts tolerable temperature to be-50 DEG C, can improve lower temperature resistance and the crushing resistance of Propylene Spherical Tanks。Wherein, the concrete preparation process of Propylene Spherical Tanks can be the preparation process that this area is conventional。
According to preparation method of the present invention, wherein, as long as described steel plate is 07MnNiMoVDR (B610CF-L2) steel plate, described forging is tolerable temperature is the 08MnNiCrMoVD forging of-50 DEG C, described welding rod is LB-65L welding rod, can improve lower temperature resistance and the crushing resistance of Propylene Spherical Tanks, but, preferably, the yield strength R of described steel plateeL>=490MPa, tensile strength Rm>=610MPa, steel plate is 1/4 position sampling laterally :-50 DEG C of Charpy-V impact power KV2>=100J, it is more preferred to, the yield strength R of described steel plateeLFor 500-700MPa, tensile strength RmFor 610-730MPa, steel plate is 1/4 position sampling laterally :-50 DEG C of Charpy-V impact power KV2For 100-300J, it is possible to improve lower temperature resistance and the crushing resistance of Propylene Spherical Tanks further。
According to preparation method of the present invention, wherein, as long as described forging is the 08MnNiCrMoVD forging that tolerable temperature is-50 DEG C, but, it may be preferable that the yield strength R of described forgingeL>=480MPa, tensile strength Rm>=600MPa ,-50 DEG C of Charpy-V impact power KV2>=60J, it is more preferred to, the yield strength R of described forgingeLFor 500-700MPa, tensile strength RmFor 600-770MPa ,-50 DEG C of Charpy-V impact power KV2For 60-80J, it is possible to improve lower temperature resistance and the crushing resistance of Propylene Spherical Tanks further。
According to preparation method of the present invention, wherein, Spherical Tank Shell Plates is obtained after compressing, the specification making this Spherical Tank Shell Plates can be: curvature≤3mm, wherein, compressing method can be the compressing method that this area is conventional, for instance can adopt press-forming machine that steel plate is pressed。
According to preparation method of the present invention, wherein, the method of retaining wall on slope can be the method for preparing the retaining wall on slope that propylene ball fills that this area is conventional, can being such as: groove type is the double V groove with root face adopt oxy-acetylene to do thermal source during cutting, cutting equipment be semi-automatic pair of mouth Cutting dolly of magnetic force, cutting process checks cut state at any time, adjust cutting torch flame in time, remove the guide wheel foreign material by locating, it is ensured that one limit of Spherical Tank Shell Plates is once cut complete。Descaling after cutting, and carry out Liquid penetrant testing groove quality。Timely check measurement is wanted after every Spherical Tank Shell Plates cutting, adjust accumulated tolerance in time, all Spherical Tank Shell Plates have small deformation after cutting, therefore the Spherical Tank Shell Plates after cutting, reply curvature checks, secondary should be carried out for overproof coverboard and look for type, look for type method to adopt the outstanding platen press of cushioning, after looking for type, its physical dimension should be checked。Wherein, the method for Liquid penetrant testing groove quality, the adjustment method of accumulated tolerance, the method for curvature inspection, the outstanding platen press of cushioning are the method that this area is conventional。
According to preparation method of the present invention, wherein, the method that the Spherical Tank Shell Plates through retaining wall on slope is carried out welding by employing welding rod can be the method that this area is conventional。Wherein, the condition of welding can be: weldment preheats temperature 90-110 DEG C。
According to preparation method of the present invention, wherein, the method in the half-finished upper manhole of spherical tank and lower manhole that is welded on by forging can be the method that this area is conventional。Wherein, the condition of welding can be: weldment preheats temperature 90-110 DEG C。
It should be appreciated by those skilled in the art, the preparation method of Propylene Spherical Tanks can also include the spherical tank being welded with forging is carried out heat treatment。
According to preparation method of the present invention, wherein, heat treated condition can be the heat treatment condition that this area is conventional, for instance may include that controlling programming rate time more than 400 DEG C is 50-80 DEG C/h, it is incubated 1-3 hour, then natural cooling after rising to 555-585 DEG C。
According to preparation method of the present invention, wherein, the method also includes: before being pressed by steel plate, solderability and lower temperature resistance to steel plate detect。The detection method of solderability can be such as welding heat affected zone maximum hardness method test, oblique Y type groove welding crack test, lower temperature resistance detection method can be drop weight test, wherein, welding heat affected zone maximum hardness method test, oblique Y type groove welding crack test, drop weight test are the test that this area is conventional。
According to preparation method of the present invention, wherein, the method also includes: after the spherical tank being welded with forging is carried out heat treatment, Propylene Spherical Tanks carries out the water pressure test and air seal test, wherein, the water pressure test and air seal test are the conventional water pressure test in this area and air seal test。
The third aspect, present invention also offers Propylene Spherical Tanks prepared by said method。
In the present invention, the volume of the Propylene Spherical Tanks prepared is 2000-3000m3, wall thickness is 44-50mm, and tolerable temperature is-45～-50 DEG C, and proof pressure is 2-3MPa。
Embodiment
In the following Examples and Comparative Examples, the water pressure test is: 2.72MPa, 5 DEG C, requires to carry out by GB12337-1998 requirement and GB50094, and after test, Propylene Spherical Tanks inside and outside 100% carries out radiographic inspection, meet JB/T4730 I grade be qualified。
Air seal test is: 2.177MPa, air dry, that clean, undertaken by GB12337-1998 requirement, the all weld seams of spherical tank and connecting portion are checked (spray suds), being further continued for boosting after confirming ne-leakage, pressure rises to test pressure, voltage stabilizing 10 minutes, carry out lysimetric test again, with ne-leakage for qualified。
Welding heat affected zone maximum hardness method test is: to 07MnNiMoVDR (B610CF-L2) steel plate, specify by GB4675.5 standard, LB-65L welding rod is adopted to carry out welding heat affected zone maximum hardness method test, test plate (panel) weld preheating temperature be room temperature, 75 DEG C, welding current is 170A, arc voltage is 25V, and speed of welding is 150mm/min；Postwelding test plate (panel) is through dissecting, and to be cut in bottom weld-fusion line, point of contact is for 0 point, and left and right is every the 0.5mm measuring point as hardness, and Vickers hardness is measured by the regulation of GB/T4340。
Oblique Y type groove welding crack test is: to 07MnNiMoVDR (B610CF-L2) steel plate, regulation by GB4675.1 standard, LB-65L welding rod is adopted to carry out oblique Y type groove welding crack test, welding preheating temperature respectively room temperature, 50 DEG C, 75 DEG C, 100 DEG C, each test temperature make 2 pieces of test plate (panel)s。During welding, ambient temperature 20 DEG C, relative humidity is 75%。
Drop weight test is: by GB6803 " the nil-ductility temperature drop weight test method of ferritic steel " standard, 07MnNiMoVDR (B610CF-L2) surface of steel plate and T/2 heart portion are carried out drop weight test。Sample sampling direction is that laterally sample is P2 type, and during test, blow energy is 400J。
Yield strength ReLWith tensile strength RmMeasuring according to GB/T228-2002 " metal material tensile testing at ambient temperature ", Charpy-V impact power and-50 DEG C of Charpy-V impact powers of forging of steel plate laterally 1/4 position sampling measure according to GB/T229-1994 " metal Charpy notch impact test method " respectively。
The method of retaining wall on slope is: groove type is the double V groove with root face, oxy-acetylene is adopted to do thermal source during cutting, cutting equipment is semi-automatic pair of mouth Cutting dolly of magnetic force, cutting process checks cut state at any time, adjust cutting torch flame in time, remove the guide wheel foreign material by locating, it is ensured that one limit of Spherical Tank Shell Plates is once cut complete。Descaling after cutting, and carry out Liquid penetrant testing groove quality。Timely check measurement is wanted after every Spherical Tank Shell Plates cutting, adjust accumulated tolerance in time, all Spherical Tank Shell Plates have small deformation after cutting, therefore the Spherical Tank Shell Plates after cutting, reply curvature checks, secondary should be carried out for overproof coverboard and look for type, look for type method to adopt the outstanding platen press of cushioning, after looking for type, its physical dimension should be checked。
The 08MnNiCrMoVD forging that tolerable temperature is-50 DEG C forges company of company limited purchased from Wuxi City flange, and LB-65L welding rod is purchased from day Benshen's steel company。
Embodiment 1
The present embodiment is for illustrating the application and Propylene Spherical Tanks and preparation method thereof of the present invention。
Steel plate is carried out respectively welding heat affected zone maximum hardness method test, oblique Y type groove welding crack test and drop weight test, test result is respectively in Table 1, table 2 and table 3, then adopt press-forming machine by 07MnNiMoVDR (B610CF-L2) steel plate that new thickness is 50mm (purchased from Baosteel, the trade mark is B610CF-L2, yield strength ReLFor 500MPa, tensile strength RmFor 610MPa, steel plate is 1/4 position sampling laterally :-50 DEG C of Charpy-V impact power KV2For 100J) it is pressed, obtain Spherical Tank Shell Plates (curvature is 3mm), then Spherical Tank Shell Plates is carried out retaining wall on slope, obtain the Spherical Tank Shell Plates through retaining wall on slope, LB-65L welding rod is adopted to be undertaken the Spherical Tank Shell Plates through retaining wall on slope welding (weldment preheating temperature is 100 DEG C) again, obtain the Propylene Spherical Tanks semi-finished product with upper manhole and lower manhole, finally adopt LB-65L welding rod by forging (the yield strength R of 08MnNiCrMoVD that tolerable temperature is-50 DEG CeLFor 500MPa, tensile strength RmFor 600MPa ,-50 DEG C of Charpy-V impact power KV2For 60J) it is welded in the half-finished upper manhole of spherical tank and lower manhole, finally the spherical tank being welded with forging is carried out heat treatment, heat treated condition is: controlling programming rate time more than 400 DEG C is 50 DEG C/h, is incubated 1 hour, then natural cooling after rising to 555 DEG C。Then the Propylene Spherical Tanks after heat treatment is carried out the water pressure test and air seal test, result shows that the Propylene Spherical Tanks Product jointing test plate (panel) mechanical property prepared meets designing requirement, hydraulic pressure air seal test ne-leakage, without visible deformation and other abnormal phenomenas, the Propylene Spherical Tanks namely prepared is qualified。
Table 1
Note: in table, the data of boldface type are welding heat affected zone maximum hardness value。
Table 2
Table 3
Note: Ο represents not disconnected；× represent fracture。
Embodiment 2
The present embodiment is for illustrating the application and Propylene Spherical Tanks and preparation method thereof of the present invention。
Steel plate is carried out respectively welding heat affected zone maximum hardness method test, oblique Y type groove welding crack test and drop weight test, test result is respectively in Table 4, table 5 and table 6, then adopt press-forming machine by 07MnNiMoVDR (B610CF-L2) steel plate that new thickness is 50mm (purchased from Baosteel, the trade mark is B610CF-L2, yield strength ReLFor 600MPa, tensile strength RmFor 680MPa, steel plate is 1/4 position sampling laterally :-50 DEG C of Charpy-V impact power KV2For 200J) it is pressed, (curvature is 2mm to obtain Spherical Tank Shell Plates,), then Spherical Tank Shell Plates is carried out retaining wall on slope, obtain the Spherical Tank Shell Plates through retaining wall on slope, adopt LB-65L welding rod that the Spherical Tank Shell Plates through retaining wall on slope carries out welding (weldment preheating temperature is 100 DEG C) again, obtain the Propylene Spherical Tanks semi-finished product with upper manhole and lower manhole, finally adopt forging (the yield strength R of 08MnNiCrMoVD that tolerable temperature is-50 DEG C with LB-65L welding rodeLFor 600MPa, tensile strength RmFor 650MPa ,-50 DEG C of Charpy-V impact power KV2For 70J) it is welded in the half-finished upper manhole of spherical tank and lower manhole, finally the spherical tank being welded with forging is carried out heat treatment, heat treated condition is: controlling programming rate time more than 400 DEG C is 65 DEG C/h, is incubated 2 hours, then natural cooling after rising to 570 DEG C。Then Propylene Spherical Tanks after heat treatment carries out the water pressure test and air seal test, and result shows that Product jointing test plate (panel) mechanical property meets designing requirement, hydraulic pressure air seal test ne-leakage, without visible deformation and other abnormal phenomenas, and the Propylene Spherical Tanks namely prepared is qualified。
Table 4
Note: in table, the data of boldface type are welding heat affected zone maximum hardness value。
Table 5
Table 6
Note: Ο represents not disconnected；× represent fracture。
Embodiment 3
The present embodiment is for illustrating the application and Propylene Spherical Tanks and preparation method thereof of the present invention。
Steel plate is carried out respectively welding heat affected zone maximum hardness method test, oblique Y type groove welding crack test and drop weight test, test result is respectively in Table 7, table 8 and table 9, then adopt press-forming machine by 07MnNiMoVDR (B610CF-L2) steel plate that new thickness is 50mm (purchased from Baosteel, the trade mark is B610CF-L2, yield strength ReLFor 700MPa, tensile strength RmFor 730MPa, steel plate is 1/4 position sampling laterally :-50 DEG C of Charpy-V impact power KV2For 300J) it is pressed, obtain Spherical Tank Shell Plates (curvature is 3mm), then Spherical Tank Shell Plates is carried out retaining wall on slope, obtain the Spherical Tank Shell Plates through retaining wall on slope, LB-65L welding rod is adopted to be undertaken the Spherical Tank Shell Plates through retaining wall on slope welding (weldment preheating temperature is 100 DEG C) again, obtain the Propylene Spherical Tanks semi-finished product with upper manhole and lower manhole, finally adopt forging (the yield strength R of 08MnNiCrMoVD that tolerable temperature is-50 DEG C with LB-65L welding rodeLFor 700MPa, tensile strength RmFor 770MPa ,-50 DEG C of Charpy-V impact power KV2For 80J) it is welded in the half-finished upper manhole of spherical tank and lower manhole, finally the spherical tank being welded with forging is carried out heat treatment, heat treated condition is: controlling programming rate time more than 400 DEG C is 80 DEG C/h, is incubated 3 hours, then natural cooling after rising to 585 DEG C。Then Propylene Spherical Tanks after heat treatment carries out the water pressure test and air seal test, and result shows that Product jointing test plate (panel) mechanical property meets designing requirement, hydraulic pressure air seal test ne-leakage, without visible deformation and other abnormal phenomenas, and the Propylene Spherical Tanks namely prepared is qualified。
Table 7
Note: in table, the data of boldface type are welding heat affected zone maximum hardness value。
Table 8
Table 9
Note: Ο represents not disconnected；× represent fracture。
By table 1, table 4, table 7 data it can be seen that the welding heat affected zone room temperature of steel plate, maximum hardness value HV at 75 DEG C10Respectively 301,263；If being not more than whether HV350 has the standard of welding cold cracking tendency as evaluation steel using welding heat affected zone maximum hardness, then this result of the test shows, the tendency of hardenability of 07MnNiMoVDR (B610CF-L2) steel plate is less, has relatively low welding cold cracking tendency。By table 2, table 5, table 8 data it can be seen that steel plate is when weld preheating 75 DEG C, do not find any welding cold cracking；If can determine that, when cracking breakout is less than 20%, the viewpoint that this steel plate is inclined to without cold crack by it has been generally acknowledged that, then it is believed that 07MnNiMoVDR (B610CF-L2) steel plate is when weld preheating more than 75 DEG C, actual welding joint occurs that the probability of cold crack is only small。By table 3, table 6, table 9 data it can be seen that 07MnNiMoVDR (B610CF-L2) steel plate has a relatively low nil-ductility temperature, the nil-ductility temperature in steel plate heart portion is substantially suitable with the nil-ductility temperature of top layer sampling。Therefore, relatively low welding cold cracking tendency shows that the solderability of 07MnNiMoVDR (B610CF-L2) steel plate is strong, the nil-ductility temperature that the nil-ductility temperature in relatively low nil-ductility temperature and steel plate heart portion samples with top layer substantially quite shows that the lower temperature resistance of 07MnNiMoVDR (B610CF-L2) steel plate is strong, it is 2-3MPa that the Propylene Spherical Tanks prepared can tolerate pressure, meets JB/T4730 I grade
In the present invention, Propylene Spherical Tanks prepared by the 08MnNiCrMoVD forging, the LB-65L welding rod that adopt 07MnNiMoVDR (B610CF-L2) steel plate, tolerable temperature to be-50 DEG C, and can prepare volume is 2000-3000m3, wall thickness is 44-50mm, and tolerable temperature is-45～-50 DEG C, and proof pressure is the low temperature resistant Propylene Spherical Tanks of 2-3MPa。
The preferred embodiment of the present invention described in detail above; but, the present invention is not limited to the detail in above-mentioned embodiment, in the technology concept of the present invention; technical scheme can being carried out multiple simple variant, these simple variant belong to protection scope of the present invention。
It is further to note that, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode, in order to avoid unnecessary repetition, various possible compound modes are no longer illustrated by the present invention separately。
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally。
Claims (10)
1. a steel plate, forging and welding rod application in preparing Propylene Spherical Tanks, it is characterized in that, described steel plate is 07MnNiMoVDR (B610CF-L2) steel plate, and described forging is tolerable temperature is the 08MnNiCrMoVD forging of-50 DEG C, and described welding rod is LB-65L welding rod。
2. application according to claim 1, wherein, the yield strength R of described steel plateeL>=490MPa, tensile strength Rm>=610MPa, steel plate is 1/4 position sampling laterally :-50 DEG C of Charpy-V impact power KV2≥100J。
3. application according to claim 1 and 2, wherein, the yield strength R of described forgingeL>=480MPa, tensile strength Rm>=600MPa ,-50 DEG C of Charpy-V impact power KV2≥60J。
4. the preparation method of a Propylene Spherical Tanks, it is characterized in that, this preparation method includes: be pressed by steel plate, obtain Spherical Tank Shell Plates, then Spherical Tank Shell Plates is carried out retaining wall on slope, obtain the Spherical Tank Shell Plates through retaining wall on slope, welding rod is adopted the Spherical Tank Shell Plates through retaining wall on slope to be welded again, obtain the Propylene Spherical Tanks semi-finished product with upper manhole and lower manhole, welding rod is finally adopted to be welded on by forging in the half-finished upper manhole of spherical tank and lower manhole, wherein, described steel plate is 07MnNiMoVDR (B610CF-L2) steel plate, described forging is tolerable temperature is the 08MnNiCrMoVD forging of-50 DEG C, described welding rod is LB-65L welding rod。
5. preparation method according to claim 4, wherein, the yield strength R of described steel plateeL>=490MPa, tensile strength Rm>=610MPa, steel plate is 1/4 position sampling laterally :-50 DEG C of Charpy-V impact power KV2≥100J。
6. preparation method according to claim 4, wherein, the yield strength R of described forgingeL>=480MPa, tensile strength Rm>=600MPa ,-50 DEG C of Charpy-V impact power KV2≥60J。
7. the preparation method according to any one in claim 4-6, wherein, the method also includes the spherical tank being welded with forging is carried out heat treatment。
8. preparation method according to claim 7, wherein, described heat treated condition includes: time more than 400 DEG C, programming rate is 50-80 DEG C/h, is incubated 1-3 hour, then natural cooling after rising to 555-585 DEG C。
9. the Propylene Spherical Tanks that prepared by the method according to claim 4-8。
10. Propylene Spherical Tanks according to claim 9, wherein, the volume of described Propylene Spherical Tanks is 2000-3000m3, wall thickness is 44-50mm, and tolerable temperature is-45～-50 DEG C, and proof pressure is 2-3MPa。
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| CN1641257A (en) * | 2004-12-28 | 2005-07-20 | 上海市安装工程有限公司 | Low-temperature spherical tank for storing ethylene and its preparing method |
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- 2014-11-26 CN CN201410696431.6A patent/CN105698003A/en active Pending
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: China National Offshore Oil Corporation Applicant after: CNOOC Huizhou Petrochemical Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Huizhou Petrochemical Co., Ltd. |
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