当(dang)封头和封头的(de)(de)(de)(de)(de)筒(tong)体在进(jin)(jin)(jin)行焊接(jie)成功之(zhi)后，首(shou)先我们要(yao)做的(de)(de)(de)(de)(de)就是(shi)(shi)及(ji)时(shi)(shi)清理掉(diao)封头焊缝和热影响(xiang)区域或者是(shi)(shi)周围留有(you)的(de)(de)(de)(de)(de)污染(ran)物和焊渣，是(shi)(shi)可(ke)(ke)以进(jin)(jin)(jin)行pt的(de)(de)(de)(de)(de)检(jian)查或者是(shi)(shi)封头表(biao)面(mian)的(de)(de)(de)(de)(de)酸(suan)洗(xi)。封头的(de)(de)(de)(de)(de)表(biao)面(mian)我们工作人员也必须保护好其(qi)表(biao)面(mian)，不(bu)(bu)(bu)要(yao)出现表(biao)面(mian)划伤或者是(shi)(shi)磕碰的(de)(de)(de)(de)(de)情(qing)况(kuang)；尽量不(bu)(bu)(bu)要(yao)让封头和碳素(su)钢发生直接(jie)的(de)(de)(de)(de)(de)接(jie)触，因为(wei)可(ke)(ke)能(neng)会因为(wei)铁离子而造成比较严重的(de)(de)(de)(de)(de)污染(ran)。存放封头千万不(bu)(bu)(bu)要(yao)在风吹雨淋(lin)的(de)(de)(de)(de)(de)环境(jing)下进(jin)(jin)(jin)行；在对(dui)封头进(jin)(jin)(jin)行组焊时(shi)(shi)不(bu)(bu)(bu)可(ke)(ke)以强制进(jin)(jin)(jin)行，不(bu)(bu)(bu)管是(shi)(shi)结构的(de)(de)(de)(de)(de)设(she)计还是(shi)(shi)别的(de)(de)(de)(de)(de)什么(me)都(dou)不(bu)(bu)(bu)能(neng)出现拘束的(de)(de)(de)(de)(de)情(qing)况(kuang)，所(suo)以应力一定要(yao)足够大。在进(jin)(jin)(jin)行水(shui)压试验时(shi)(shi)，水(shui)中氯离子的(de)(de)(de)(de)(de)含量不(bu)(bu)(bu)要(yao)大于25mg/L，当(dang)试验结束之(zhi)后，立马将其(qi)吹干。镜面(mian)椭圆封头设(she)备，就选温州(zhou)浩邦金属(shu)制品有(you)限公司(si)，让您满意，欢迎您的(de)(de)(de)(de)(de)来电哦！内蒙(meng)古油罐椭圆封头厂家

碳钢封(feng)头(tou)(tou)出(chu)现裂纹的(de)解决方法：1、提升化学成分(fen)即(ji)(ji)在不(bu)改(gai)(gai)酿成形(xing)工(gong)(gong)艺的(de)情况(kuang)下(xia)可(ke)改(gai)(gai)用更好(hao)的(de)资料(liao)。2、提高(gao)封(feng)头(tou)(tou)的(de)加(jia)工(gong)(gong)温(wen)度实行温(wen)旋(xuan)压(ya)工(gong)(gong)艺。3、改(gai)(gai)变应变巨细(xi)依据资料(liao)介绍即(ji)(ji)从Cr-Ni不(bu)锈钢冷加(jia)工(gong)(gong)对(dui)到导(dao)磁率的(de)影响可(ke)以(yi)看出(chu)在变形(xing)量百(bai)分(fen)之。可(ke)以(yi)在变形(xing)较大区(qu)域增加(jia)压(ya)制(zhi)次数，控制(zhi)每次变形(xing)量在百(bai)分(fen)之。4、热处置固溶处置能消(xiao)除马氏(shi)体恢复机(ji)能。5、提高(gao)焊(han)接质(zhi)量在旋(xuan)制(zhi)进步行探伤检查(cha)消(xiao)除内外部(bu)缺陷(xian)。选用适合(he)的(de)焊(han)接工(gong)(gong)艺，提高(gao)焊(han)接接头(tou)(tou)力(li)(li)学机(ji)能减(jian)小热影响区(qu)。江西(xi)热交换椭(tuo)圆封(feng)头(tou)(tou)厂家温(wen)州(zhou)浩邦金属制(zhi)品有限公(gong)司致力(li)(li)于提供镜(jing)面椭(tuo)圆封(feng)头(tou)(tou)设备，期待(dai)您(nin)的(de)光临(lin)！

封(feng)(feng)(feng)头(tou)(tou)制(zhi)(zhi)造(zao)通用(yong)工(gong)艺(yi)规(gui)(gui)程(cheng)(cheng)(cheng)：范围(wei)、拼板(ban)、焊(han)接(jie)(jie)、成(cheng)形(xing)、检验等(deng)的(de)方法和要(yao)(yao)求。总则封(feng)(feng)(feng)头(tou)(tou)的(de)制(zhi)(zhi)造(zao)除符合(he)本规(gui)(gui)程(cheng)(cheng)(cheng)的(de)规(gui)(gui)定外，还(hai)应遵(zun)守国家(jia)颁布的(de)有关法令(ling)、法规(gui)(gui)、标(biao)(biao)(biao)准、和其它相应规(gui)(gui)程(cheng)(cheng)(cheng)和图(tu)样(yang)及工(gong)艺(yi)文件的(de)要(yao)(yao)求。材(cai)料(liao)(liao)，并(bing)附有钢(gang)板(ban)生产(chan)单(dan)位的(de)钢(gang)材(cai)质(zhi)量(liang)证(zheng)明(ming)书(shu)和确认(ren)标(biao)(biao)(biao)记。、二类及无(wu)类压力容器的(de)封(feng)(feng)(feng)头(tou)(tou)的(de)材(cai)料(liao)(liao)质(zhi)量(liang)证(zheng)明(ming)书(shu)项(xiang)目齐(qi)(qi)全(quan)，实物标(biao)(biao)(biao)志清(qing)楚，可不(bu)(bu)(bu)复(fu)验。若(ruo)材(cai)料(liao)(liao)质(zhi)量(liang)证(zheng)明(ming)书(shu)项(xiang)目不(bu)(bu)(bu)齐(qi)(qi)全(quan)或(huo)(huo)齐(qi)(qi)全(quan)但实物标(biao)(biao)(biao)志不(bu)(bu)(bu)清(qing)楚者，必(bi)须复(fu)验合(he)格。并(bing)与实物标(biao)(biao)(biao)志相符，且经本公司(si)复(fu)验合(he)格。4制(zhi)(zhi)造(zao)检验流(liu)程(cheng)(cheng)(cheng)。，如(ru)需拼接(jie)(jie)时，封(feng)(feng)(feng)头(tou)(tou)各(ge)种不(bu)(bu)(bu)相交的(de)拼焊(han)焊(han)缝中心(xin)线间距离(li)至(zhi)少应为封(feng)(feng)(feng)头(tou)(tou)钢(gang)材(cai)厚(hou)度的(de)3倍(bei)，且不(bu)(bu)(bu)小于(yu)(yu)100㎜。当封(feng)(feng)(feng)头(tou)(tou)由瓣片和顶(ding)圆板(ban)拼接(jie)(jie)制(zhi)(zhi)成(cheng)时，接(jie)(jie)头(tou)(tou)方向(xiang)(xiang)只(zhi)允许是径向(xiang)(xiang)和环向(xiang)(xiang)的(de)，中心(xin)顶(ding)圆板(ban)直(zhi)径应小于(yu)(yu)1/2DN。，不(bu)(bu)(bu)得拼接(jie)(jie)。（外协(xie)成(cheng)形(xing)封(feng)(feng)(feng)头(tou)(tou)下(xia)料(liao)(liao)尺寸按外协(xie)厂家(jia)要(yao)(yao)求）划线，采用(yong)机械加(jia)工(gong)、等(deng)离(li)子切割或(huo)(huo)氧乙炔焰(yan)气割等(deng)方法进(jin)行下(xia)料(liao)(liao)和切割坡口，切割后(hou)必(bi)须去净割瘤、飞溅、毛刺(ci)及氧化层(ceng)(ceng)，并(bing)用(yong)砂轮打磨呈金属光泽，坡口表面不(bu)(bu)(bu)得有裂纹、分层(ceng)(ceng)、夹渣等(deng)缺陷(xian)。

封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)按形(xing)(xing)(xing)(xing)(xing)状不(bu)同(tong)，可(ke)分(fen)为(wei)半(ban)(ban)(ban)球(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)、无(wu)折(zhe)边(bian)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)、椭圆(yuan)(yuan)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)、蝶(die)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)、锥形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)等多(duo)(duo)个(ge)种类(lei)，不(bu)同(tong)的(de)(de)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)有(you)(you)哪些特点(dian)，又(you)适用(yong)(yong)于哪些领域呢？1、半(ban)(ban)(ban)球(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)。半(ban)(ban)(ban)球(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)又(you)被(bei)(bei)称为(wei)球(qiu)(qiu)冠(guan)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)，其受(shou)力(li)(li)结(jie)构(gou)形(xing)(xing)(xing)(xing)(xing)式理想，深(shen)度较(jiao)(jiao)(jiao)大，但由(you)于制造难(nan)(nan)度相(xiang)对较(jiao)(jiao)(jiao)高，一般只用(yong)(yong)于压(ya)力(li)(li)较(jiao)(jiao)(jiao)高、直(zhi)(zhi)径(jing)(jing)较(jiao)(jiao)(jiao)大的(de)(de)压(ya)力(li)(li)容器(qi)(qi)，在日常生活中较(jiao)(jiao)(jiao)少使用(yong)(yong)。2、平(ping)(ping)底(di)(di)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)。平(ping)(ping)底(di)(di)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)底(di)(di)面平(ping)(ping)整(zheng)，侧边(bian)向上(shang)折(zhe)弯，整(zheng)体结(jie)构(gou)简(jian)单(dan)，制造难(nan)(nan)度低(di)(di)，但平(ping)(ping)底(di)(di)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)综合受(shou)力(li)(li)情(qing)况较(jiao)(jiao)(jiao)差，相(xiang)同(tong)受(shou)压(ya)条(tiao)件下，所需厚(hou)度更多(duo)(duo)。平(ping)(ping)底(di)(di)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)综合成本较(jiao)(jiao)(jiao)低(di)(di)，经(jing)(jing)常用(yong)(yong)于压(ya)力(li)(li)较(jiao)(jiao)(jiao)低(di)(di)、直(zhi)(zhi)径(jing)(jing)较(jiao)(jiao)(jiao)小的(de)(de)容器(qi)(qi)。3、椭圆(yuan)(yuan)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)。椭圆(yuan)(yuan)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)由(you)半(ban)(ban)(ban)个(ge)椭圆(yuan)(yuan)面和一圆(yuan)(yuan)柱(zhu)直(zhi)(zhi)边(bian)段(duan)组(zu)(zu)成，综合了(le)半(ban)(ban)(ban)球(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)受(shou)力(li)(li)好(hao)和碟形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)深(shen)度浅的(de)(de)优点(dian)，椭圆(yuan)(yuan)部(bu)(bu)分(fen)经(jing)(jing)线曲率平(ping)(ping)滑连续，应(ying)力(li)(li)分(fen)布(bu)均匀，综合性能较(jiao)(jiao)(jiao)好(hao)。椭圆(yuan)(yuan)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)是目前较(jiao)(jiao)(jiao)为(wei)常用(yong)(yong)的(de)(de)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)种类(lei)，被(bei)(bei)广泛应(ying)用(yong)(yong)于储(chu)罐、反应(ying)釜、换(huan)热器(qi)(qi)等低(di)(di)压(ya)容器(qi)(qi)。4、蝶(die)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)。蝶(die)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)又(you)称带折(zhe)边(bian)球(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)，由(you)球(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)表(biao)面，圆(yuan)(yuan)柱(zhu)直(zhi)(zhi)边(bian)和过(guo)渡部(bu)(bu)分(fen)组(zu)(zu)成，曲率半(ban)(ban)(ban)径(jing)(jing)小于球(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)表(biao)面的(de)(de)半(ban)(ban)(ban)径(jing)(jing)。碟形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)深(shen)度较(jiao)(jiao)(jiao)浅，消耗(hao)材料更少，加(jia)(jia)工较(jiao)(jiao)(jiao)为(wei)容易(yi)，加(jia)(jia)工成本更低(di)(di)，当椭圆(yuan)(yuan)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)加(jia)(jia)工有(you)(you)困难(nan)(nan)时(shi)，一般使用(yong)(yong)碟形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)代。温州浩邦金属制品有(you)(you)限公司镜面椭圆(yuan)(yuan)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)设备(bei)设备(bei)值得放心(xin)。

椭(tuo)圆封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)整(zheng)(zheng)体(ti)(ti)(ti)冲(chong)(chong)压(ya)(ya)(ya)模(mo)(mo)具(ju)的(de)(de)(de)制作方法技术(shu)(shu)领域：本实用(yong)(yong)(yong)新(xin)型(xing)(xing)(xing)(xing)涉及压(ya)(ya)(ya)力容(rong)器(qi)(qi)领域，具(ju)体(ti)(ti)(ti)地讲是一(yi)种(zhong)椭(tuo)圆封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)整(zheng)(zheng)体(ti)(ti)(ti)冲(chong)(chong)压(ya)(ya)(ya)模(mo)(mo)具(ju)。背景(jing)技术(shu)(shu)：封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)是压(ya)(ya)(ya)力容(rong)器(qi)(qi)上(shang)的(de)(de)(de)端盖，是压(ya)(ya)(ya)力容(rong)器(qi)(qi)的(de)(de)(de)ー个主要承(cheng)压(ya)(ya)(ya)部件(jian)。根据几何形(xing)(xing)状(zhuang)的(de)(de)(de)不(bu)同(tong)(tong)，可(ke)(ke)分(fen)为(wei)(wei)球(qiu)形(xing)(xing)、椭(tuo)圆形(xing)(xing)、碟(die)形(xing)(xing)、球(qiu)冠(guan)形(xing)(xing)、锥壳和(he)(he)平(ping)盖等几种(zhong)，其中(zhong)球(qiu)形(xing)(xing)、椭(tuo)圆形(xing)(xing)、碟(die)形(xing)(xing)、球(qiu)冠(guan)型(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)又统(tong)称为(wei)(wei)凸(tu)(tu)形(xing)(xing)封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)。封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)可(ke)(ke)用(yong)(yong)(yong)于各种(zhong)容(rong)器(qi)(qi)设(she)备(bei)(bei)，如储(chu)罐、换热器(qi)(qi)、塔(ta)、反(fan)应釜、锅炉和(he)(he)分(fen)离设(she)备(bei)(bei)等。用(yong)(yong)(yong)于制造(zao)封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)成(cheng)型(xing)(xing)(xing)(xing)方法和(he)(he)装置有(you)多种(zhong)，如基于带整(zheng)(zheng)体(ti)(ti)(ti)支承(cheng)裙座(zuo)的(de)(de)(de)厚壁封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)，需(xu)要经过锻造(zao)、切削和(he)(he)热态拉伸成(cheng)型(xing)(xing)(xing)(xing)等步骤，得到(dao)整(zheng)(zheng)体(ti)(ti)(ti)封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)锻件(jian)。随着(zhe)技术(shu)(shu)的(de)(de)(de)发展(zhan)，采用(yong)(yong)(yong)冲(chong)(chong)压(ya)(ya)(ya)来制造(zao)封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)已经成(cheng)为(wei)(wei)广(guang)泛应用(yong)(yong)(yong)的(de)(de)(de)技木，为(wei)(wei)了(le)提高生产(chan)效率，需(xu)要对封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)一(yi)体(ti)(ti)(ti)成(cheng)型(xing)(xing)(xing)(xing)。封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)成(cheng)型(xing)(xing)(xing)(xing)冲(chong)(chong)压(ya)(ya)(ya)模(mo)(mo)具(ju)”，包括上(shang)模(mo)(mo)座(zuo)，所述(shu)(shu)上(shang)模(mo)(mo)座(zuo)上(shang)设(she)置有(you)凸(tu)(tu)模(mo)(mo)，所述(shu)(shu)凸(tu)(tu)模(mo)(mo)的(de)(de)(de)工作面(mian)与(yu)封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)凹面(mian)匹(pi)配，所述(shu)(shu)凸(tu)(tu)模(mo)(mo)下方设(she)置有(you)与(yu)凸(tu)(tu)模(mo)(mo)对应的(de)(de)(de)凹摸，所述(shu)(shu)凹模(mo)(mo)的(de)(de)(de)工作面(mian)与(yu)封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)凸(tu)(tu)面(mian)匹(pi)配；上(shang)述(shu)(shu)凹模(mo)(mo)的(de)(de)(de)中(zhong)部设(she)置有(you)卸件(jian)弹簧。技术(shu)(shu)虽然能实现整(zheng)(zheng)体(ti)(ti)(ti)冲(chong)(chong)压(ya)(ya)(ya)成(cheng)型(xing)(xing)(xing)(xing)，但是若将其用(yong)(yong)(yong)于椭(tuo)圆封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)整(zheng)(zheng)体(ti)(ti)(ti)成(cheng)型(xing)(xing)(xing)(xing)，会带来诸(zhu)如兼(jian)容(rong)性差(cha)、匹(pi)配难等问题，从而影响产(chan)品(pin)的(de)(de)(de)质量。另外，不(bu)同(tong)(tong)的(de)(de)(de)使用(yong)(yong)(yong)场(chang)合，对封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)刚强(qiang)度以及精度的(de)(de)(de)要求也有(you)所不(bu)同(tong)(tong)。镜面(mian)椭(tuo)圆封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)设(she)备(bei)(bei)，就选(xuan)温州浩邦金(jin)属制品(pin)有(you)限公司(si)，让(rang)您满意，欢迎您的(de)(de)(de)来电！新(xin)疆(jiang)国标椭(tuo)圆封(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)图片

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封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)是(shi)(shi)锅炉(lu)、压力(li)容(rong)器(qi)(qi)的(de)(de)(de)(de)主(zhu)(zhu)要受(shou)压元件，其结构(gou)及(ji)形(xing)(xing)(xing)状设计是(shi)(shi)否合理(li)，影响(xiang)着锅炉(lu)、压力(li)容(rong)器(qi)(qi)的(de)(de)(de)(de)安全。所以有关规(gui)范(fan)中(zhong)对各(ge)种封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)(de)形(xing)(xing)(xing)状都有限(xian)制。（1）椭(tuo)(tuo)球(qiu)(qiu)(qiu)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)锅炉(lu)、压力(li)容(rong)器(qi)(qi)的(de)(de)(de)(de)凸形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)宜采(cai)用椭(tuo)(tuo)球(qiu)(qiu)(qiu)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)，比较(jiao)好选用标准椭(tuo)(tuo)球(qiu)(qiu)(qiu)形(xing)(xing)(xing)（Ｄn／ｈn＝４）。采(cai)用非标准椭(tuo)(tuo)球(qiu)(qiu)(qiu)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)时(shi)(shi)，其长短轴的(de)(de)(de)(de)比值(zhi)不(bu)(bu)(bu)得大(da)于(yu)(yu)(yu)(yu)。（2）碟形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)碟形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)即是(shi)(shi)有折边(bian)(bian)的(de)(de)(de)(de)球(qiu)(qiu)(qiu)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)。它(ta)存在(zai)较(jiao)大(da)的(de)(de)(de)(de)弯(wan)曲应(ying)(ying)(ying)(ying)力(li)，而椭(tuo)(tuo)球(qiu)(qiu)(qiu)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)主(zhu)(zhu)要是(shi)(shi)膜应(ying)(ying)(ying)(ying)力(li)，因而在(zai)工程(cheng)使(shi)用中(zhong)并(bing)(bing)不(bu)(bu)(bu)理(li)想(xiang)。采(cai)用碟形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)时(shi)(shi)，封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)过渡(du)区(qu)(qu)转(zhuan)角半(ban)径(jing)应(ying)(ying)(ying)(ying)不(bu)(bu)(bu)小于(yu)(yu)(yu)(yu)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)内(nei)(nei)(nei)直径(jing)的(de)(de)(de)(de)10％，且不(bu)(bu)(bu)小于(yu)(yu)(yu)(yu)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)厚度的(de)(de)(de)(de)3倍，封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)球(qiu)(qiu)(qiu)面(mian)部分的(de)(de)(de)(de)内(nei)(nei)(nei)半(ban)径(jing)应(ying)(ying)(ying)(ying)不(bu)(bu)(bu)大(da)于(yu)(yu)(yu)(yu)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)(de)内(nei)(nei)(nei)直径(jing)。（3）无(wu)(wu)折边(bian)(bian)球(qiu)(qiu)(qiu)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)无(wu)(wu)折边(bian)(bian)球(qiu)(qiu)(qiu)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)与筒体(ti)的(de)(de)(de)(de)连接处存在(zai)明显(xian)的(de)(de)(de)(de)形(xing)(xing)(xing)状突变，会产(chan)生较(jiao)大(da)的(de)(de)(de)(de)附加弯(wan)曲应(ying)(ying)(ying)(ying)力(li)，因此(ci)只应(ying)(ying)(ying)(ying)用于(yu)(yu)(yu)(yu)直径(jing)较(jiao)小、压力(li)较(jiao)低的(de)(de)(de)(de)容(rong)器(qi)(qi)。采(cai)用无(wu)(wu)折边(bian)(bian)球(qiu)(qiu)(qiu)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)时(shi)(shi)，封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)(de)球(qiu)(qiu)(qiu)面(mian)内(nei)(nei)(nei)半(ban)径(jing)不(bu)(bu)(bu)应(ying)(ying)(ying)(ying)大(da)于(yu)(yu)(yu)(yu)筒体(ti)内(nei)(nei)(nei)直径(jing)。（4）锥(zhui)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)锥(zhui)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)(de)受(shou)力(li)情况(kuang)*优于(yu)(yu)(yu)(yu)平板盖(gai)(gai)，它(ta)只在(zai)容(rong)器(qi)(qi)的(de)(de)(de)(de)生产(chan)工艺确实(shi)需要的(de)(de)(de)(de)情况(kuang)下才采(cai)用。无(wu)(wu)折边(bian)(bian)锥(zhui)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)(de)半(ban)锥(zhui)角不(bu)(bu)(bu)得大(da)于(yu)(yu)(yu)(yu)30°。半(ban)锥(zhui)角大(da)于(yu)(yu)(yu)(yu)30°时(shi)(shi)，应(ying)(ying)(ying)(ying)采(cai)用带(dai)折边(bian)(bian)的(de)(de)(de)(de)锥(zhui)形(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)，并(bing)(bing)要求折边(bian)(bian)过渡(du)区(qu)(qu)的(de)(de)(de)(de)转(zhuan)角内(nei)(nei)(nei)半(ban)径(jing)应(ying)(ying)(ying)(ying)不(bu)(bu)(bu)小于(yu)(yu)(yu)(yu)圆筒体(ti)内(nei)(nei)(nei)直径(jing)的(de)(de)(de)(de)10％，且应(ying)(ying)(ying)(ying)不(bu)(bu)(bu)小于(yu)(yu)(yu)(yu)锥(zhui)体(ti)厚度的(de)(de)(de)(de)3倍。（5）平板盖(gai)(gai)平板盖(gai)(gai)与其他(ta)封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)比较(jiao)，受(shou)力(li)情况(kuang)想(xiang)对轻差。内(nei)(nei)(nei)蒙古油罐椭(tuo)(tuo)圆封(feng)(feng)(feng)(feng)(feng)头(tou)(tou)(tou)(tou)(tou)(tou)(tou)厂家

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