焊接坡口形式(英文版).doc

Welding Grooves Forms and Types GXX-XXXXX1 ScopeThis document defines the code of welding groove, chamfering and different kinds of grooves.This document can be used for all structural welding joints.2 Definitions of groove code2.1 Butt joint2.2 Fillet joint16GXX-XXXXX3 ChamferingIf two base plates thickness are different, they should be constructed as Table 1.Table 1 Chamfering detailsArrangement planNoteSectionPlan a=t1-t Chamfering if a3mm； L=3a;The direction of these grooves as I,1/2V,V,X, ，K ； Consider the thin plate, when automatic welding.4 Butt jointWhen welding different grade materials, choose the easily constructed process.4.1 Groove types for FCB SAW (See Table 2)；Table 2 Groove type for FCB SAWProcessCodeSketchApplicable plateNoteOne-side SAWFYS8t19 Used for A，B，D，AH32，AH36 DH32，DH36 steel; Used for long butt joint in the panel flow line; No back gouging； Consider t1,when t1t2.19t2424t3131t3636t404.2 Groove types for Both-side SAW (See Table 3)；Table 3 Groove types for Both-side SAWProcessCodeSketchApplicable plateNoteBoth-side autoweldingAI5t20 No back gouging； When t2t13mm, t2 is considered; When t2t13mm, t1 is considered; When 5t13mm, able to use for E,EH steel; When 5t18mm, able to be used for D,DH steel; AYSAYN19.0t21.5 No back gouging； When t1t2, t1 is considered。ADYS（=AXS）ADYN（=AXN）21.5t25 No back gouging； ADYS（or N），S，N refers to 1st W/D side。25t75ADY2SADY2N21.5t25When ADYS（or N）failed.25t754.3 Groove types for one-side SAW(See Table 4)Table 4 Groove types for one-side SAWProcessCodeSketchApplicable plateNoteOne-side automatic weldingGVN11t25 Up-vertical position Gt=6090Gh=4590Gt:Angle between the weld and the panel line of the welding plate;Gh:Angle between the welding side and the panel;Simplified electric gas-arc welding)； When 11t14，not to be used for E, EH steel。25t40ThicknessAr40t5025550t6082AOI5t10 One-side automatic welding with backing；AOVSAOVN10t25(A,B,AH,D,DH) Backing required；GOVSGOVN7t25(A,B,AH,D,DH) Used when AOVS failed; One-side automatic welding with backing；4.4 Groove types for semi-auto welding(See Table 5)Table 5 Groove types for semi-auto weldingProcessCodeSketchApplicable plateNoteOne-side semi-auto weldingCOVSCOVN5t100One-side semi-auto welding with backingCOVSCOVN25t140Used for the joint between cast steel and A，B，D，E steel;One-side semi-auto welding with backing; When t35mm，used except E steel。CO1/2VSCO1/2VN5t60One-side semi-auto welding with backing;CO1/2VSCO1/2VN25t140 Used for the joint between cast steel and A，B，D，E steel; Backing required； When t35mm，used except E steel。SOVSSOVN5t65 Backing required； Semi-auto welding one-pass firstly, then auto-welding;（CO2+SAW）SOVSSOVN65t100 Backing required； Semi-auto welding one-pass firstly, then auto-welding;（CO2+SAW）Table 5（Continued）ProcessCodeSketchApplicable plateNoteBoth-side auto weldingCI5t7 No back gouging； Used for A，B，AH32，AH36 steel。CVSCVN10t38Back gauging.C1/2VSC1/2VN5t60Back gauging.When welding SO1/2V and the root space is not enough, repairing required.5t19No back gauging when fillet welding.CX2SCX2N19t100 Back gauging; ( ) is able to be used for pipes; CX2S（or N），S（or N）refer to 1st W/D side； 1st W/D refer to the side of t/3。Table 5（Continued）ProcessCodeSketchApplicable plateNoteBoth-side semi-auto weldingCK2SCK2N19t100 Back gauging; CX2S（or N），S（or N）refer to 1st W/D side； 1st W/D refer to the side of t/3。SVSSVN5t100 Back gauging（CO2+SAW）SX2SSX2N19t50 Back gauging； ( ) is used for pipes。 CX2S（or N），S（or N）refer to 1st W/D side； 1st W/D refer to the side of t/3。 (CO2+SAW)5 Fillet joint5.1 Fillet weldingTable 6 Code of fillet jointTypesCodeSketchDouble continuous weldSingle continuous weldDouble balanced intermittent fillet weld Double staggered intermittent fillet weldSlot weld5.2 Groove types for penetration beadsTable 7 Groove types for penetration beadsProcessCodeSketchApplicable plateNoteSingle beveledT-joint weldingt6 No back gouging； Manual or semi-auto； n=0.25t(max.6) One-side welding； 451356.5t13 No back gouging； Manual or semi-auto； n=0.25t(max.6)Backing required。t50 No back gouging； Manual or semi-auto； n=0.25t(max.6) =4060Special filet joint welding5t19No back gougingTable 7（Continued）ProcessCodeSketchApplicable plateNotet5 No back gouging； n=0.25t(max.6) Manual or semi-auto。Partial penetra-tion welding13t19 No back gouging； Manual or semi-auto； n=0.25t(max.6)t19 No back gouging； Manual or semi-auto； n=0.25t(max.6)t19 No back gouging； Manual or semi-auto； n=0.25t(max.6) When nt/4，marked in drawing。Table 7（Continued）ProcessCodeSketchApplicable plateNotePartial penetration weldingt19 No back gouging； Manual or semi-auto； n=0.25t(max.6) When nt/4，marked in drawing。Double continuous fillet weldiing7t20 No back gouging； Manual or semi-auto； 60 Beveling required。7t20 No back gouging； Manual or semi-auto； t=7-8: 7090t=9-10: 7590t=11-15: 8090t=16-20: 8590604013t20 No back gouging； Manual or semi-auto.Table 7（Continued）ProcessCodeSketchApplicable plateNoteFull-penetration welding5t19 n=t/4(max.6)Manual or semi-auto； F：weld Beveled side firstly,（2/3t）(with backing) ，then weld the other side after removing the backing; when 03，no backing required, back gouging needed5t n=t/4(max.6) Manual or semi-auto； F：weld Beveled side firstly,（2/3t）(with backing) ，then weld the other side after removing the backing;when 03，no backing required, back gouging needed;30150t38 n=t/4(max.6) Manual or semi-auto； F：weld Beveled side firstly,（2/3t）(with backing) ，then weld the other side after removing the backing;when 03，no backing required, back gouging needed;Table 7（Continued）ProcessCodeSketchApplicable plateNoteFull-penetration weldingt38 n=t/4(max.6) Manual or semi-auto； F：weld Beveled side firstly,（2/3t）(with backing) ，then weld the other side after removing the backing;when 03，no backing required, back gouging needed;X=t/3, 2/3t19t25 n=t/4(max.6) Manual or semi-auto； F：weld Beveled side firstly,（2/3t）(with backing) ，then weld the other side after removing the backing;when 03，no backing required, back gouging needed;X=t/325t38 n=t/4(max.6) Manual or semi-auto； F：weld Beveled side firstly,（2/3t）(with backing) ，then weld the other side after removing the backing;when 0