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31. 发明申请

WO2010140703A1 PHOTOCURABLE COMPOSITION SUITABLE FOR RUST PREVENTION OF A THREADED JOINT FOR STEEL PIPES 审中-公开
标题翻译：适用于防止钢管螺纹接头的光电组合物
公开(公告)号：WO2010140703A1
公开(公告)日：2010-12-09
申请号：PCT/JP2010/059587
申请日：2010-06-01
申请人： SUMITOMO METAL INDUSTRIES, LTD. , VALLOUREC MANNESMANN OIL & GAS FRANCE , CHUGOKU MARINE PAINTS, LTD. , NAGAREO Tomomitsu , KAMEDA Yoshinori , MATSUMOTO Keishi , KAMIMURA Takayuki , TAKAHASHI Masaru , GOTO Kunio , IMAI Ryuichi
发明人： NAGAREO Tomomitsu , KAMEDA Yoshinori , MATSUMOTO Keishi , KAMIMURA Takayuki , TAKAHASHI Masaru , GOTO Kunio , IMAI Ryuichi
IPC分类号： C08F290/06 , F16L15/04 , F16L58/04
CPC分类号： F16L15/001 , C08F290/06 , C09D5/086 , C09D175/16 , Y10T428/31692 , C08F222/1006 , C08F220/12 , C08F230/02
摘要： A thin and highly transparent coating having excellent air tightness, adhesion to a substrate, lubricating properties, galling resistance, and corrosion resistance is formed on the surface of a metal substrate and particularly on the surface of a threaded joint which is used for connection of oil country tubular goods. A photocurable composition comprising (A) a photocurable (meth)acrylate resin, (B) a (meth)acrylate monomer selected from a monofunctional (meth)acrylate monomer and a difunctional (meth)acrylate monomer, (C) a trifunctional or higher multifunctional (meth)acrylate monomer, (D) a photopolymerization initiator, (E) a benzotriazole anticorrosive agent, (F) an anticorrosive pigment selected from a phosphate anticorrosive pigment and calcium ion-exchanged silica, and (G) a phosphate ester is used to form a photocured coating.
摘要翻译：在金属基材的表面上，特别是在用于连接油的螺纹接头的表面上形成具有优异的气密性，对基材的粘附性，润滑性，耐磨损性和耐腐蚀性的薄且高度透明的涂层国家管状物品。一种可光固化组合物，其包含（A）光固化性（甲基）丙烯酸酯树脂，（B）选自单官能（甲基）丙烯酸酯单体和双官能（甲基）丙烯酸酯单体的（甲基）丙烯酸酯单体，（C）三官能以上多官能（甲基）丙烯酸酯单体，（D）光聚合引发剂，（E）苯并三唑防腐剂，（F）选自磷酸盐防腐颜料和钙离子交换二氧化硅的防腐颜料和（G）磷酸酯形成光固化涂层。

32. 发明申请

WO2010130344A1 SET FOR PRODUCING A THREADED CONNECTION FOR DRILLING AND OPERATING HYDROCARBON WELLS, AND RESULTING THREADED CONNECTION 审中-公开
标题翻译：用于生产用于钻孔和操作碳氢化合物的螺纹连接以及结果螺纹连接
公开(公告)号：WO2010130344A1
公开(公告)日：2010-11-18
申请号：PCT/EP2010/002682
申请日：2010-05-03
申请人： VALLOUREC MANNESMANN OIL & GAS FRANCE , SUMITOMO METAL INDUSTRIES, LTD. , GRANGER, Scott , CARON, Olivier , VERGER, Eric
发明人： GRANGER, Scott , CARON, Olivier , VERGER, Eric
IPC分类号： E21B17/042
CPC分类号： E21B17/042
摘要： The invention concerns a set for producing a threaded connection, comprising a first and a second tubular component with an axis of revolution (10), one of their ends (1, 2) being provided with a threaded zone (3; 4) formed on the external or internal peripheral surface of the component depending on whether the threaded end is of the male or female type, said ends (1, 2) finishing in a terminal surface (7, 8) which is orientated radially with respect to the axis of revolution (10) of the tubular components, said threaded zones (3; 4) comprising threads (32; 42) comprising, viewed in longitudinal section passing through the axis of revolution (10) of the tubular components, a thread crest (35, 45), a thread root (36, 46), a load flank (30; 40) and a stabbing flank (31; 41), the width of the thread crests (35, 45) of each tubular component reducing in the direction of the terminal surface (7; 8) of the tubular component under consideration, while the width of the thread roots (36, 46) increases, characterized in that the lead of the male stabbing flanks and/or load flanks is different from the lead of the female stabbing flanks and/or load flanks. The invention also pertains to a threaded connection.
摘要翻译：本发明涉及一种用于生产螺纹连接的组件，包括具有旋转轴线（10）的第一和第二管状部件，其端部（1,2）中的一个设置有螺纹区域（3; 4）所述部件的外部或外部周边表面取决于所述螺纹端部是阳型还是阴型，所述端部（1,2）在终端表面（7,8）中完成，所述端子表面（7,8）相对于所述螺纹区域（3; 4）包括螺纹（32; 42），所述螺纹区域（32; 42）包括在穿过所述管状部件的旋转轴线（10）的纵向截面中观察到的螺纹孔（35; 45），螺纹根部（36,46），负载侧面（30; 40）和刺刀侧面（31; 41），每个管状部件的螺纹牙顶（35,45）的宽度沿考虑到管状部件的端子表面（7; 8），而螺纹根部（36,46）的宽度其特征在于，雄性刺入侧面和/或承载侧面的引线与雌性刺入侧翼和/或负载侧面的引线不同。本发明还涉及螺纹连接。

33. 发明申请

WO2010066365A1 SEALED TUBULAR CONNECTION USED IN THE OIL INDUSTRY, AND METHOD FOR PRODUCING SAID CONNECTION 审中-公开
标题翻译：用于油田的密封管状连接以及生产连接的方法
公开(公告)号：WO2010066365A1
公开(公告)日：2010-06-17
申请号：PCT/EP2009/008550
申请日：2009-12-01
申请人： VALLOUREC MANNESMANN OIL & GAS FRANCE , SUMITOMO METAL INDUSTRIES, LTD. , VERGER, Eric , MAILLON, Bertrand , DALY, Daly , BEIGNEUX, Sylvain
发明人： VERGER, Eric , MAILLON, Bertrand , DALY, Daly , BEIGNEUX, Sylvain
IPC分类号： F16L15/04 , E21B17/042
CPC分类号： F16L15/04 , E21B17/042 , Y10T29/49826
摘要： The invention concerns a threaded connection (1) comprising a first and a second tubular component, the first component comprising a male end (3) provided on its outer peripheral surface with, in succession, a threaded zone (5), a sealing surface (13) then a terminal surface (15) finishing in an abutment surface (7) which is orientated radially with respect to the axis of revolution (20) of the connection (1), the second component comprising a female end (2) provided on its inner peripheral surface with, in succession, a threaded zone (4), a sealing surface (12) then a recess (10) finishing in an abutment surface (8) which is orientated radially with respect to the axis of revolution (20) of the connection, the threaded zone (5) of the male end (3) being made up into the threaded zone (4) of the female end (2) such that the sealing surfaces (12) and (13) are in interfering contact, as are the abutment surfaces (7) and (8), the space between the terminal surface (15) and the recess (10) defining a volume (17), characterized in that the volume (17) is at least partially filled with a filling material (M). The invention also concerns a method for producing such a connection.
摘要翻译：本发明涉及一种包括第一和第二管状部件的螺纹连接件（1），所述第一部件包括设置在其外周表面上的阳端（3），所述阳端连续地具有螺纹区域（5），密封表面 13），然后在相对于连接件（1）的旋转轴线（20）径向取向的邻接表面（7）中完成终端表面（15），所述第二部件包括设置在其上的阴端（2）其内周表面依次具有螺纹区域（4），密封表面（12），然后在相对于旋转轴线（20）径向定向的邻接表面（8）中完成凹陷（10）的连接件，阳端（3）的螺纹区域（5）被制成阴端（2）的螺纹区域（4），使得密封表面（12）和（13）处于干涉接触（7）和（8）一样，端子表面（15）和凹部（10）之间的空间，限定容积（17），其特征在于，体积（17）至少部分地填充有填充材料（M）。本发明还涉及一种用于生产这种连接的方法。

34. 发明申请

WO2010066230A2 VERFAHREN ZUR HERSTELLUNG NAHTLOSER ROHRE MITTELS EINES DREI-WALZEN-STANGENWALZWERKS 审中-公开
标题翻译：通过三辊罗拉生产无缝管的方法
公开(公告)号：WO2010066230A2
公开(公告)日：2010-06-17
申请号：PCT/DE2009/001685
申请日：2009-11-20
申请人： V & M DEUTSCHLAND GMBH , SUMITOMO METAL INDUSTRIES, LTD , KÜMMERLING, Rolf , BELLMANN, Manfred , BRAUN, Winfried , KINUGASA, Hidenori , KENICHI, Sasaki
发明人： KÜMMERLING, Rolf , BELLMANN, Manfred , BRAUN, Winfried , KINUGASA, Hidenori , KENICHI, Sasaki
IPC分类号： B21B27/02 , B21B23/00
CPC分类号： B21B27/024 , B21B17/04 , B21B17/14 , B21B23/00
摘要： Die Erfindung betrifft ein Verfahren zur Herstellung von nahtlosen Rohren aus Metall, insbesondere aus Stahl, wobei ein zuvor erzeugter heißer Hohlblock mittels eines Drei-Walzen-Stangenwalzwerkes auf einer Dornstange zu einem Mutterohr abgestreckt wird und der Hohlblock vor Einlaufen in das Stangenwalzwerk über ein vorgeschaltetes Gerüst mit einem den Durchmesser vergleichmäßigenden Walzschritt versehen wird. Dabei ist vorgesehen, dass die Walzen des vorgeschalteten Gerüstes in gleichem Maße auf- und zugefahren werden wie die Verformungsgerüste des Stangenwalzwerkes, wobei der Kalibergrundradius der Walzen des vorgeschalteten Gerüstes sich über 60° erstreckt und diesem ein Flankenradius mit tangentialem Übergang folgt, der so bemessen ist, dass auch bei maximalem Zustellen der Walzen im Bereich der Flanke nahezu keine Durchmesserreduktion des größten zu erwartenden Hohlblockdurchmessers erfolgt.
摘要翻译：
本发明涉及一种用于生产金属的无缝钢管特别是钢的，其中，先前产生的HOT它是由三辊棒上的芯棒轧机到母耳朵的装置和熨烫中空锭的方法在进入棒材轧机之前，通过预备步骤提供锭块，轧制步骤与直径相当。提供的是所述上游GER导航用途国有贸易的辊子在相同的马大街＆E上升，并反馈在作为线材轧机的Verformungsger海岸，其特征在于，所述上游GER导航用途国有贸易的辊子的槽底半径超过60° 延伸，并且，与切向导航使用过渡如下，其即使在侧面的区域中的辊子的最大进刀尺寸使得的边缘半径在直径几乎没有降低GR＆ouml; ROAD 10个预期空心块直径为

35. 发明申请

WO2009060552A1 THREADED JOINT FOR STEEL PIPES 审中-公开
标题翻译：螺纹钢管接头
公开(公告)号：WO2009060552A1
公开(公告)日：2009-05-14
申请号：PCT/JP2007/072231
申请日：2007-11-08
申请人： SUMITOMO METAL INDUSTRIES, LTD. , VALLOUREC MANNESMANN OIL & GAS FRANCE , YAMAGUCHI, Suguru , NAKAMURA, Keiichi , SUGINO, Masaaki , IWAMOTO, Michihiko , BRIQUET, Gabriel , PATUREAU, Claire , DALY, Daly , MAILLON, Bertrand
发明人： YAMAGUCHI, Suguru , NAKAMURA, Keiichi , SUGINO, Masaaki , IWAMOTO, Michihiko , BRIQUET, Gabriel , PATUREAU, Claire , DALY, Daly , MAILLON, Bertrand
IPC分类号： F16L15/00
CPC分类号： F16L15/004 , E21B17/042 , E21B17/08 , F16L15/06
摘要： A threaded joint for steel pipes comprising a pin (1) and a box (2). The pin has a male thread (11) and a lip (12) which comprises (i) a sealing surface (13) and (ii) a nose portion (16) provided with a shoulder surface. The box has a female thread (21), a sealing surface (23) and a shoulder surface. The shoulder surface of the pin comprises two distinct adjacent surfaces, main shoulder (14) in the inner side and sub shoulder (15) in the outer side. Correspondingly, the shoulder surface of the box comprises two distinct adjacent surfaces, main shoulder (24) in the inner side and sub shoulder (25) in the outer side. The main shoulder surfaces of the pin and box are disposed such as to prevent a radially inward deformation of the lip end, and the sub shoulder surfaces of pin and box are disposed such as to limit a radially outward deformation of the lip end. The main shoulder of the pin has a greater radial dimension than said sub shoulder of the pin, and at least the main shoulder surface of the pin is in axial abutment with at least the corresponding main shoulder surface of the box.
摘要翻译：一种用于钢管的螺纹接头，包括销（1）和箱体（2）。销具有外螺纹（11）和唇缘（12），该唇缘包括（i）密封表面（13）和（ii）设有肩部表面的鼻部（16）。盒具有阴螺纹（21），密封表面（23）和肩部表面。销的肩部表面包括两个不同的相邻表面，内侧的主肩部（14）和外侧的副肩部（15）。相应地，盒子的肩部表面包括两个不同的相邻表面，内侧的主肩部（24）和外侧的副肩部（25）。销和盒的主肩面被设置成防止唇端的径向向内变形，并且销和盒的副肩面被设置成限制唇端的径向向外变形。销的主肩部具有比销的所述副肩部更大的径向尺寸，并且销的至少主肩部表面与箱体的至少相应的主肩部表面轴向邻接。

36. 发明申请

WO2009000428A1 THREADED ELEMENT OF A COMPONENT WITH OPPOSED THREADING PORTIONS AND CORRESPONDING TUBULAR THREADED CONNECTION 审中-公开
标题翻译：具有对接螺纹部件的组件的螺纹元件和相应的管状螺纹连接
公开(公告)号：WO2009000428A1
公开(公告)日：2008-12-31
申请号：PCT/EP2008/004720
申请日：2008-06-10
申请人： VALLOUREC MANNESMANN OIL & GAS FRANCE , SUMITOMO METAL INDUSTRIES, LTD. , GILLOT, Laurent , VERGER, Eric , TARTAR, Olivier
发明人： GILLOT, Laurent , VERGER, Eric , TARTAR, Olivier
IPC分类号： E21B17/042 , F16L15/06
CPC分类号： F16L15/002 , Y10T403/5746
摘要： A threaded element (EM) of a component (T2) comprises at least first (FE1) and second (FE2) threading portions each comprising threads (TH1, TH2) each comprising a stabbing flank and a loading flank. The stabbing flanks and loading flanks of the threads (TH1) of the first threading portion (FE1) and the threads (TH2) of the second threading portion (FE2) are inclined in an opposed manner with respect to the radial direction.
摘要翻译：部件（T2）的螺纹元件（EM）包括至少第一（FE1）和第二（FE2）穿透部分，每个包括螺纹（TH1，TH2），每个螺纹元件包括刺入侧面和加载侧面。第一穿线部分（FE1）的螺纹（TH1）和第二穿线部分（FE2）的螺纹（TH2）的刺入侧面和加载侧面相对于径向相对倾斜。

37. 发明申请

WO2007017082A1 LIQUID AND GAS TIGHT THREADED TUBULAR CONNECTION 审中-公开
标题翻译：液体和气体紧密连接的管状连接
公开(公告)号：WO2007017082A1
公开(公告)日：2007-02-15
申请号：PCT/EP2006/007242
申请日：2006-07-21
申请人： VALLOUREC MANNESMANN OIL & GAS FRANCE , SUMITOMO METAL INDUSTRIES, LTD. , CHARVET-QUEMIN, Jean-François , EMERY, Jean-Pierre , HAMAMOTO, Takahiro , SUGINO, Masaaki
发明人： CHARVET-QUEMIN, Jean-François , EMERY, Jean-Pierre , HAMAMOTO, Takahiro , SUGINO, Masaaki
IPC分类号： F16L15/04
CPC分类号： F16L15/004 , E21B17/042
摘要： A first axial abutment surface (6) formed at the free end of an annular lip (5) of a threaded male element (1) and a second axial abutment surface (9) formed at the end of a housing (7) of a threaded female element (2) have a same axial half-sections (S) the inclination of which varies progressively in the radial direction. Such a configuration of the axial abutment surfaces optimizes the radial thrust exerted on the end of the lip depending on its thickness, in order to obtain an increased radial interference between the respective sealing surfaces (10, 12) of both elements. Application to hydrocarbon wells.
摘要翻译：形成在螺纹阳元件（1）的环形唇缘（5）的自由端处的第一轴向邻接表面（6）和形成在螺纹的外壳（7）的端部处的第二轴向邻接表面（9）阴元件（2）具有相同的轴向半部（S），其倾斜度在径向上逐渐变化。轴向邻接表面的这种构造优化了根据其厚度施加在唇缘端部上的径向推力，以便在两个元件的相应的密封表面（10,12）之间获得增加的径向干涉。应用于油气井。

38. 发明申请

WO2006104251A1 THREADED JOINT FOR STEEL PIPES 审中-公开
标题翻译：螺纹管接头钢管
公开(公告)号：WO2006104251A1
公开(公告)日：2006-10-05
申请号：PCT/JP2006/307167
申请日：2006-03-29
申请人： SUMITOMO METAL INDUSTRIES, LTD. , VALLOUREC MANNESMANN OIL & GAS FRANCE , GOTO, Kunio , IMAI, Ryuichi
发明人： GOTO, Kunio , IMAI, Ryuichi
IPC分类号： F16L15/04
CPC分类号： C10M177/00 , C10M111/04 , C10M2201/0413 , C10M2201/0623 , C10M2201/1053 , C10M2205/163 , C10M2207/0285 , C10M2207/2623 , C10M2209/0845 , C10M2209/1045 , C10M2219/0463 , C10N2210/02 , C10N2240/22 , C10N2250/10 , C10N2250/121 , C10N2250/14 , C10N2270/00 , C10N2280/00 , E21B17/042 , F16L15/004 , F16L58/182
摘要： A threaded joint for steel pipes for use in an oil well which has improved galling resistance and which is protected from rusting comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion. The contact surface of at least one of the pin and the box has a lower layer of a viscous liquid or semisolid lubricating coating comprising at least wax and a fatty acid alkaline earth metal salt and not containing a harmful heavy metal such as lead and an upper layer of a dry solid coating formed from an aqueous resin coating composition, an organic solvent type coating composition, or an ultraviolet curing coating composition.
摘要翻译：一种用于油井中的钢管螺纹接头，其具有改善的耐磨损性并且防止生锈，包括销和箱体，每个销和箱都具有包括螺纹部分和无螺纹金属接触部分的接触表面。销和箱中的至少一个的接触表面具有粘性液体或半固体润滑涂层的下层，其至少包含蜡和脂肪酸碱土金属盐，并且不含有害重金属如铅和上层由水性树脂涂料组合物，有机溶剂型涂料组合物或紫外线固化涂料组合物形成的干固体涂层层。

39. 发明申请

WO2006075774A1 THREADED JOINT FOR STEEL PIPES 审中-公开
标题翻译：螺纹管接头
公开(公告)号：WO2006075774A1
公开(公告)日：2006-07-20
申请号：PCT/JP2006/300661
申请日：2006-01-11
申请人： SUMITOMO METAL INDUSTRIES, LTD. , IMAI, Ryuichi , GOTO, Kunio , TAKANASHI, Kaoru , OGAWA, Yasuhiro
发明人： IMAI, Ryuichi , GOTO, Kunio , TAKANASHI, Kaoru , OGAWA, Yasuhiro
IPC分类号： F16L15/04 , C23C24/04 , F16B33/06
CPC分类号： C10M125/02 , C10M125/22 , C10M2201/041 , C10M2201/065 , C10M2201/066 , C10N2240/22 , C10N2250/18 , C23C28/00 , C23C28/321 , C23C28/322 , C23C28/3225 , C23C28/324 , C23C28/34 , C23C28/345 , C23C28/347 , E21B17/042 , E21B17/08 , F16B33/008 , F16B33/06 , F16L15/004 , F16L58/182
摘要： A threaded joint for steel pipes comprises a pin (1) and a box (2) each having a threaded portion (3a or 3b) and an unthreaded metal-to-metal contact portion (4a or 4b) as contact surfaces which contact each other when the joint is fastened. The contact surfaces (3a and 4a and/or 3b and 4b) of at least one of the pin (1) and the box (2) are coated with a lower layer of a solid lubricating coating containing a solid lubricating powder (e.g., molybdenum disulfide, tungsten disulfide, or graphite) and a binder (e.g., an epoxy or other organic resin) and an upper layer of a solid corrosion protective coating formed by an organic resin which does not contain solid particles.
摘要翻译：用于钢管的螺纹接头包括销（1）和盒（2），每个具有螺纹部分（3a或3b）和作为彼此接触的接触表面的无螺纹金属对金属接触部分（4a或4b）当关节紧固时。销（1）和箱（2）中的至少一个的接触表面（3a和4a和/或3b和4b）涂覆有固体润滑涂层的下层，其含有固体润滑粉末（例如钼二硫化物，二硫化钨或石墨）和粘合剂（例如环氧树脂或其它有机树脂）和由不含固体颗粒的有机树脂形成的固体防腐蚀涂层的上层。

40. 发明申请

WO2004031420A1 HIGH STRENGTH SEAMLESS STEEL PIPE EXCELLENT IN HYDROGEN-INDUCED CRACKING RESISTANCE AND ITS PRODUCTION METHOD 审中-公开
标题翻译：高强度无缝钢管优良的氢诱导破碎电阻及其生产方法
公开(公告)号：WO2004031420A1
公开(公告)日：2004-04-15
申请号：PCT/JP2003/012373
申请日：2003-09-26
申请人： SUMITOMO METAL INDUSTRIES, LTD. , MURAO, Nobutoshi , HISAMUNE, Nobuyuki , OSAKO, Hajime , KONDO, Kunio
发明人： MURAO, Nobutoshi , HISAMUNE, Nobuyuki , OSAKO, Hajime , KONDO, Kunio
IPC分类号： C21D8/10
CPC分类号： C22C38/02 , C21D8/10 , C21D8/105 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/002 , C22C38/04 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/42 , C22C38/44 , C22C38/46
摘要： The present invention relates to a high strength seamless steel pipe excellent in hydrogen-induced cracking resistance, characterized by consisting of, by mass %, C: 0.03 - 0.11 %, Si: 0.05 - 0.5 %, Mn: 0.8 - 1.6 %, P: 0.025 % or less, S: 0.003 % or less, Ti: 0.002 - 0.017 %, Al: 0.001 - 0.10 %, Cr: 0.05 - 0.5 %, Mo: 0.02 - 0.3 %, V: 0.02 - 0.20 %, Ca: 0.0005 - 0.005 %, N: 0.008 % or less and O (Oxygen): 0.004 % or less, and the balance Fe and impurities, and also characterized in that the microstructure of the steel is bainite and/or martensite, ferrite is precipitated at grain boundaries and yield stress is 483 MPa or more. Further, to ensure high strength of the steel, the seamless steel pipe preferably contains, by mass %, at least one of Cu: 0.05 - 0.5 % and Ni: 0.05 - 0.5 %. To produce the above-mentioned steel pipe, it is desirable to limit a starting temperature of quenching after rolling, a cooling rate and a tempering temperature. By this configuration a seamless steel pipe having an yield stress of 483 MPa or more and excellent HIC resistance, which is suitable for a pipeline, can be provided.
摘要翻译：本发明涉及一种氢致抗裂性优异的高强度无缝钢管，其特征在于，以质量％计含有C：0.03〜0.11％，Si：0.05〜0.5％，Mn：0.8〜1.6％，P ：0.025％以下，S：0.003％以下，Ti：0.002〜0.017％，Al：0.001〜0.10％，Cr：0.05〜0.5％，Mo：0.02〜0.3％，V：0.02〜0.20％，Ca： 0.0005〜0.005％，N：0.008％以下，O（氧）：0.004％以下，余量为Fe和杂质，其特征还在于钢的组织为贝氏体和/或马氏体，铁素体析出晶界和屈服应力为483MPa以上。此外，为了确保钢的高强度，无缝钢管优选以质量％计含有Cu：0.05〜0.5％，Ni：0.05〜0.5％中的至少一种。为了制造上述钢管，优选限制轧制后的淬火起始温度，冷却速度和回火温度。通过这种结构，可以提供一种适用于管道的屈服应力为483MPa以上，耐HIC电阻优异的无缝钢管。

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