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4、V YR av0. 8 Lm,HRCl55b“ -i51 3V V,58V *N ,7YN ,0,7YVB !,r N 1 pb %N5,!9 B*N “d,VN AA,g PrT A, ? S N b,9 ?h V5NCb4 T “ -S =Kv 5, M z P 7b TpN“Z# ! !9 ,N V 5Fwb HP9 , 5, s !9ZY,7 O s !9a/# PZ Y, BZYKrTbTe:陈峰( 1981- ),男,助理工程师,主要从事无缝钢管生产设备的研究和设计工作bl : 2007- 07- 27I : )#52# 焊 管 2008 M1 Keywords: petro le
5、um pipeline; corrosion detection; evaluationDomesticLevelerof 220mm Precision TubularCHEN FengAbstractID: 1001-3938( 2008) 01-0050-EAAbstract: At present, leveler of 220mm precision tubular is dom esticm achine of precision tubularw ith them ax imum diam eter, which has rem arka-ble characteristic o
6、n the design of leveling roller, the arrangem ent of roller system and the design ofm a in and assistant equipm ent, especially ow nsindependent intellectua l property rights about the arrangem ent of roller system ( the arrangem ent ofa jar interlaced roller system ajar), under the sam equantity of
7、 roller condition, the leveling precision ishigher than that ofother leveling unit. This article briefly states technical characteristic of levelerof 220mm precision tubular, and discuss shortage occurred dur ing usage, and also proposes disposalm easure which provides reference to designand applica
8、tion of leveler of 220mm precision tubular.Keywords: precision tube; leveler; arrangem ent of roller systemResearch onDirectlyFormingProcessofSquareSteelPipeof 300mm 300mm 12mmDU H ong-q ingAbstractID: 1001-3938( 2008) 01-0053-EAAbstract: Through research of production process of square steelpipe w
9、ith 300mm 300mm 12mm produced by LW1250 cold bending profile u-nit under directly form ing process, this process is found to have m any questions such as existing of surface scratch, discontinuousw eld seam, non-penetration, and adhering impedance. A im ing at above existing questions, pass design a
10、nd design of roller structure are optim ized and improvedw hich is effective to controlw elding V sharp angle, on the other hand, design of im pedance is also optim ized, and effective section area is reduced to50% - 60% of internal section area of steel pipe, w hich improve product quality of squar
11、e steel pipe and obtain excellent effect.Keywords: square steel pipe; pass design; roller dtructure; V sharp angle; impedanceCalculation ofBoosting andWaterSupplyofHydrostaticTestofWeldedPipeandDesign ofHigh PressureWaterSystemCHEN Y ing-lian, CHENG Shao-zhongAbstractID: 1001-3938( 2008) 01-0057-EAA
12、bstract:H ydrostatic test machine is indispensable testing equipm ent for pipeline production, each pipem ust be carried out hydrostatic test to as-sure the quality. In order to m eet testing requirem ent ofw eld pipew ith high strength and largew all thickness, necessary theory calculation and veri
13、f-ication are carried out, and dependable hydraulic pressure system is developed. This article em phasizes calculation of boosting andw ater supply anddesign of high pressure w ater system.Keywords: subm erged arc w elded pipe; hydrostatic test; testing pressure; capacity increm ent high pressure w
14、ater systemModificationDesign onHydroCylinderofSteelPlatePre-bendingMachineWANG Ya-liAbstractID: 1001-3938( 2008) 01-0061-EAAbstract: Pre-bending m achine is one of the m ost im portant facilities in the production of LSAW pipe w ith larger diam eter. O verseas technique toproduce pre-bending m achi
15、ne has beenm ature which have high tonnage and efficiency, but its cost is also very high. A im ing at smallm anufacturingenterprise of steel pipe, the production costs of pre-bending m achine could be reduced, and satisfy the needs ofm inor enterprise by im porting thetechnique of pre-bending m ach
16、ine from other country andm odifying design on hydro cylinder of steel plate pre-bending.Keywords: longitudinal spiral arcw elded pipe( LSAW pipe); pre-bending m achine; m odification design on hydro cylinderCommonQualityProblem quality problem; cause analysesMethod ofImproving theWeldingQualityofSt
17、eelPipe in PipelineZONG Bo, YANG W an-xia, ZHU Da-quanAbstractID: 1001-3938( 2008) 01-0070-EAAbstract: This article introduces 4m ethods in order to improve thew elding qua lity aim ing at production of certain pipeline, and g ives the details ofpractical plan. These m ethods includes: increasing th
18、e out-put ability of interna lw elding current, adopting w eld seam autom atic tracking device,adding the display equipm ent of outside w elding current, im proving w ire feeding m achine of inside w elding. The result show s that w elding quality ofsteel pipe is improved obviously.Keywords: spiralw elded pipe; w elding current; w eld seam tracking; w elding angle; w ire feeding m achine#99# 31 1 K1
