《钢筋焊接及验收规程》新旧对照.doc

文档介绍：钢筋焊接方法的适用范围焊接方法接头型式适用范围钢筋牌号钢筋直径(mm)电阻点焊HPB300HRB335HRBF335HRB400HRBF400CRB5506~166~166~165~12闪光对焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF500RRB4008~228~328~3210~3210~32箍筋闪光对焊HPB300HRB335HRBF335HRB400HRBF4006~166~166~16电弧焊帮条焊双面焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF5006~226~406~406~40单面焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF5006~226~406~406~40搭接焊双面焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF5006~226~406~406~40HPB3006~22单面焊HRB335HRBF335HRB400HRBF400HRB500HRBF5006~406~406~40熔槽帮条焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF50020~2220~4020~4020~(mm)坡口焊平焊HPB300HRB335HRBF335HRB400HRBF40018~4018~4018~4018~40电弧焊HRB500HRBF500立焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF50018~4018~4018~4018~40钢筋与钢板搭接焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF5008~408~408~408~40窄间隙焊 HPB300HRB335HRBF335HRB400HRBF40016~4016~4016~40预埋件钢筋角焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF5006~256~256~256~25穿孔塞焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF50020~2520~2520~2520~25埋弧压力焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF5006~256~256~256~25埋弧螺柱焊电渣压力焊HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF50012~3212~3212~3212~32气压焊固态HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF50012~4012~4012~4012~40熔态注:,适用范围的钢筋直径指两根不同直径钢筋交叉叠接中较小钢筋的直径;;,对于有较高要求的抗震结构用钢筋,在牌号后加E(例如:HRB400E,HRBF400E)可参照同级别钢筋施焊。,如果有HPB235钢筋需要进行焊接时,可参考采用HPB300钢筋的焊接工艺参数。连续闪光焊钢筋上限直径焊机容量钢筋牌号钢筋直径(mm)160(150)HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF50022222020100HPB300HRB335HRBF335HRB400HRBF400HRB500HRBF5002020181680(75)HPB300HRB335HRBF335HRB400HRBF400161412烧化留量的选择,应根据焊接工艺方法确定。当连续闪光焊时,闪光过程应较长。烧化留量应等于两根钢筋在断料时切断机刀口严重压伤部分(包括端面的不平整度),再加8mm。闪光—预热闪光焊时,应区分一次烧化留量和二次烧化留量。一次烧化留量应不小于10mm。预热闪光焊时的烧化留量应不小于10mm。3需要预热时,宜采用电阻预热法。预热留量应为1~2mm,预热次数应为1~4次;~2s,间歇时间应为3~4s。4顶锻留量应为4~10mm,并应随钢筋直径的增大和钢筋牌号的提高而增加。其中,有电顶锻留量约占1/3,无电顶锻留量约占2/3,焊接时必须控制得当。钢筋帮条长度钢筋牌号焊缝型式帮条长度lHPB300单面焊≥8d双面焊≥4dHRB335HRBF335HRB400HRBF400HRB500HRBF500RRB400单面焊≥10d双面焊≥5d电渣压力焊焊接参数钢筋直径焊接电流焊接电压(V)焊接通电时间(s)~18