焊接坡口形式(英文版).doc

Welding Grooves’ Forms and Types GXX-XXXXX Scope This 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 code 2.1 Butt joint 2.2 Fillet joint 3 Chamfering If two base plates’ thickness are different, they should be constructed as Table 1. Table 1 Chamfering details Arrangement plan Note Section Plan a=t1-t Chamfering if a＞3mm； L=3a; —The direction of these grooves as I,1/2V,V,X, ，K ； Consider the thin plate, when automatic welding. 4 Butt joint When 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 SAW Process Code Sketch Applicable plate Note One-side SAW FYS 8≤t＜19 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. 19≤t＜24 24≤t＜31 31≤t＜36 36≤t＜40 4.2 Groove types for Both-side SAW (See Table 3)； Table 3 Groove types for Both-side SAW Process Code Sketch Applicable plate Note Both-side auto welding AI 5≤t≤20 — No back gouging； When t2－t1≤3mm, t2 is considered; When t2－t1≤3mm, t1 is considered; — When 5≤t≤13mm, able to use for E,EH steel; — When 5≤t≤18mm, able to be used for D,DH steel; AYS AYN 19.0≤t≤21.5 — No back gouging； — When t1≤t2, t1 is considered。 ADYS （=AXS） ADYN （=AXN） 21.5＜t≤25 — No back gouging； — ADYS（or N），S，N refers to 1st W/D side。 25＜t≤75 ADY2S ADY2N 21.5＜t≤25 When ADYS（or N）failed. 25＜t≤75 4.3 Groove types for one-side SAW(See Table 4) Table 4 Groove types for one-side SAW Process Code Sketch Applicable plate Note One-side automatic welding GVN 11≤t≤25 — Up-vertical position Gt°=60°∽90° Gh°=45°∽90° Gt: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)；