钢板制焊接弯头（90，45）制作相关参数表及图示:一。钢板制弯头第一种形式：钢板制中二边二虾壳弯头90-即三大节弯头（设计单位：鞍山焦化耐火材料设计研究院）1.肘管（钢板弯头）一般制作成不带法兰盘的（如图一），用T422号电焊条与煤气管道进行对接焊接。2。当时管与设备或阀门相连接时可做成带法兰的焊接法兰盘按IB503-3，转动法兰盘按IB503-4制造。3。肘管和法兰的材料为A3，Pg=1kgf/cm4。制造与安装技术条件 IB503-365。本图规定的d1,d2位最小尺寸，按设计要求可加大。（表中L4为弯头两端带法兰的尺寸，图中位置同L1）6，对于Dg700者，要求背面加强焊缝。(注：式中d1，d2均为弯头曲率半径)公称直径Dg外径DOSd1d2RLlL2L3L4重量kg2002196302310270321347520414216.22502737292300260321396621314721.03003208292300262321455822615329.43503776342350300421737226218130.24004266392400350421937930220639.64504786442450400422138534222149.65005296492500450422349238424261.86006306542550490522689943227681.6700720659260054052293100482301100.8800820669270064052334113564342135.0900920774075068060366119612376187.810001020779080073060393119665403221.011001120785086079060422122723432261.012001220791092085060451124782461304.613001320798099091070490137840500357.21400142071040105097070520140900530412.015001520810901100102070547140954557520.4160016208115011601080705771411014587594.0180018208127012801190806431551125653740.0200020208140014101310907132701245723902.02200222081510152014209077017313607801069.02400242081620163015309082517614708351249.0二。90钢制弯头大样图Dg=450-2000（中三边二即四大节），源于标准图集S311页32-4。说明：1。本土尺寸以毫米计，重量以公斤计。 2。弯头用A3钢板制造，用T42焊条焊接。 3。工作压力：Dg600mm,Pg=16kgf/cm;Dg700mm,Pg=10kgf/cm. 4.如采用法兰，须参照钢制法兰大样图 5。加工完毕后，外表刷底漆一遍（底漆包括樟丹或冷底子油），外层防腐由设计院决定。 6。管子下料图中“L”，未包括切割余量，加工时由工厂决定。重量及尺寸表DgD2d12d9RFHL0LL1d1d2d3d4d5d6d7d8d9重量450480968252400391145071815083437476280981131231266650053097828245039115007981665394354709011012613714192600630974316490391154085819793741547497.51211411541581187007209763545403911390938226238435881107.513415717217714880082099641464039116901098257648547196127.5159184201207198900920992450680391173011622890465372101135.517019921822523510001020992490730391178012423204465375107145.51842162382452791200122010965728405812910145238334857831211672132512772864341400142011109656950671310301646446150619113618924228731732863016001620128872410207614111017765089445690142203264316350362846180018201486798111084161210193657184356951532212893473863991210200020201482874120094161310210063464156991632393153794224371453三.45钢制弯头大样图 Dg=502000，资料源于标准图集（1975）S311第326说明:1.本图尺寸以毫米计，重量以公斤计。2.弯头用A3钢板制造，用T422焊条焊接。3.工作压力 Dg600mm,Pg=16kgf/cm Dg700mm,Pg=10kgf/cm4. 如采用法兰，须参照“钢制法兰大样图”。5.加工完毕后,外表面刷底漆一遍（底漆包括樟丹漆或冷底子油）。6.管子下料图中“L”未包括切割余量，加工由工厂决定。尺寸及重量表：DgD?2d1?2d9RFHL0LL1d1d2d3d4d5d6d7d8d9重量50573.52690365801481791314151618202122230.69707343058110386901642291516171922252728291.128089436681304061001842801819212426293135341.25100108444841603861102043392223252832363441422.1125133458185396125232418252832374246492.741501594.5542304261352545092728313642485556576.612002196621462604282866033153374852406771736.95250273832391016029210002628345248707630032584216626042101652921021212334350377940192300421117532011042427344660864004269503504011195358133828324156709810811133.445048094003911215396150834374162809811312813641.4500530945038112354361065394354709011012613714157.46006209490381125547219973741547497.51211541646570072095404111275510226238435981107.513415717017780.580082096404011315588251648547