船舶舱室设备底座焊接工艺规范.docx

编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第页共NUMPAGES8页第PAGE\*MERGEFORMAT8页共NUMPAGES\*MERGEFORMAT8页船舶舱室设备底座焊接工艺规范WELDINGPROCEDURESPECIFICATIONFOREQUIPMENTBASEOFHULLCABIN1范围Scope本规范规定了船舶舱室重要设备底座焊接与普通设备底座焊接施工前的准备、人员、工艺要求、工艺过程、检验。Thespecificationrulestherequirementsofforeweldingtopreparation,personnel,technologicalrequirements,technologyprocess,examination;whichareforbaseofimportantequipmentsandcommonequipmentsofhullcabin.本规范适用于各类船舶舱室设备底座的焊接。Thespecificationapplytotheweldingforequipmentbaseofdiversifiedhullcabin.2规范引用文件«船舶建造质量检验»Referringtodocument≤QUALITYINSPECTIONOFSHIPBUILDING≥3焊接前准备Preparationofforewelding3.1CJ422钛钙型药皮碳钢焊条参数(CJ422parametersforCsteelelectrodeofTiandCacovering)表3.1-1(form)试验项目(Testproject)δs(Mpa)δb(Mpa)δ5(%)AKV（-20°）J≥330≥420≥22≥47X射线探伤(Radiographicinspection)：Ⅱ级（Gradetwo）焊条直径(MM)Diameter2.53.245焊接电流(A)Current60~110120~150160~210220~2703.2CJ507低氢钠药皮碳钢焊条参数(CJ422parametersforCsteelelectrodeoflowhydrogenNacovering)表3.2-1(form)试验项目(Testproject)δs(Mpa)δb(Mpa)δ5(%)AKV（-20℃）J(-30℃)≥400≥490≥22≥47≥27X射线探伤(Radiographicinspection)Ⅱ级（Gradetwo）焊条直径(MM)Diameter2.53.2455.8焊接电流(A)Current60~110120~150160~210220~270210~2603.3焊前施工人员应先了解被焊工件的施工要求及作业环境、钢材牌号等级、据此按材料的选配原则确定焊条焊丝牌号、规格及极性。Weldershouldknowabouttheweldingrequirements,environment,brandandgrandofsteelbeforewelding.Accordingtothat,todecidethebrand,sizeofelectrodeandwireandpolarityontheprincipleofchoosingmaterial.3.4定位焊Tackwelding3.4.1定位焊用的焊条牌号应与正式焊缝的焊条牌号相同。Electrodebrandfortackweldingshallbeuniformwithnormalwelds.3.4.2定位焊高度不得超过正式焊缝的高度，焊后的熔渣应立即去除。Theheightoftackweldingdon’texceednormalwelds,eliminatingpos