球(qiu)形(xing)封(feng)(feng)頭(tou)在我們的生(sheng)活中比較常(chang)見，并且無(wu)論從工(gong)作的強度(du)還(huan)是節省(sheng)材料上來講(jiang)，都(dou)是一(yi)種非常(chang)不錯的選擇(ze)。而且球(qiu)形(xing)封(feng)(feng)頭(tou)的設計合理，并采(cai)用無(wu)角(jiao)焊縫(feng)的鏈接，受力更(geng)均勻，使(shi)用壽命更(geng)長。經過大量的研(yan)究發現，球(qiu)形(xing)封(feng)(feng)頭(tou)無(wu)論是采(cai)用哪種形(xing)式，河北半球(qiu)形(xing)封(feng)(feng)頭(tou)，通常(chang)情況下它(ta)都(dou)是容器中較為薄弱(ruo)的一(yi)個部(bu)位。并且球(qiu)形(xing)封(feng)(feng)頭(tou)的強度(du)一(yi)般還(huan)只有筒體強度(du)的70%~80%左右。

選擇安全地點挖個圓坑，把胎具架(jia)在(zai)坑上(shang)面。毛(mao)(mao)坯放(fang)在(zai)胎具上(shang)(與(yu)胎具同(tong)心)，用(yong)(yong)(yong)壓圈壓好(hao)，用(yong)(yong)(yong)油氈(zhan)紙(zhi)在(zai)毛(mao)(mao)坯外(wai)(wai)(wai)周圍(wei)成(cheng)一個擋(dang)圈，外(wai)(wai)(wai)圍(wei)用(yong)(yong)(yong)8號鐵線(xian)做兩個鐵箍箍緊，并用(yong)(yong)(yong)黃甘(gan)油抹縫，以擋(dang)圈中不(bu)漏水(shui)，不(bu)漲開(kai)為準。另(ling)外(wai)(wai)(wai)用(yong)(yong)(yong)8號鐵線(xian)做一個三(san)角(jiao)支架(jia)，放(fang)在(zai)毛(mao)(mao)坯的(de)中心。把、和用(yong)(yong)(yong)油紙(zhi)包(bao)(bao)好(hao)，外(wai)(wai)(wai)面用(yong)(yong)(yong)黃甘(gan)油密封，放(fang)在(zai)三(san)角(jiao)架(jia)上(shang)。為防止后包(bao)(bao)浮起(qi)，應該用(yong)(yong)(yong)沙(sha)子(zi)包(bao)(bao)將(jiang)藥包(bao)(bao)壓住。然后向油氈(zhan)紙(zhi)國內注水(shui)，加到水(shui)面高出200—300毫米為止。

球形(xing)封(feng)(feng)頭(tou)(tou)(qiuxingfengtou)也稱為球型封(feng)(feng)頭(tou)(tou)，是以(yi)球殼的(de)(de)球冠部分所構成的(de)(de)封(feng)(feng)頭(tou)(tou)，有半(ban)(ban)球形(xing)封(feng)(feng)頭(tou)(tou)和無折(zhe)邊球性封(feng)(feng)頭(tou)(tou)兩類。壓(ya)力(li)容器多采用半(ban)(ban)球形(xing)封(feng)(feng)頭(tou)(tou)作為端(duan)封(feng)(feng)頭(tou)(tou)，其優點是在同樣容積下表(biao)面積小(xiao)，半(ban)(ban)球形(xing)封(feng)(feng)頭(tou)(tou)制造廠，相同承(cheng)壓(ya)條件下需要的(de)(de)厚(hou)度(du)薄(bo)，從(cong)節省(sheng)材料和強度(du)上看，半(ban)(ban)球形(xing)封(feng)(feng)頭(tou)(tou)價格，是合(he)理的(de)(de)。

無(wu)折邊球(qiu)形封(feng)(feng)(feng)頭(tou)與(yu)簡體(ti)用角(jiao)焊縫銜接，常用作容(rong)器中(zhong)兩獨立受壓室(shi)的中(zhong)心封(feng)(feng)(feng)頭(tou)，也可作端封(feng)(feng)(feng)頭(tou)。不(bu)銹(xiu)鋼(gang)封(feng)(feng)(feng)頭(tou)是一(yi)(yi)(yi)種用來封(feng)(feng)(feng)堵不(bu)銹(xiu)鋼(gang)管(guan)(guan)道的產品(pin)。是管(guan)(guan)道到頭(tou)了之(zhi)后(hou)或者在一(yi)(yi)(yi)段圓(yuan)管(guan)(guan)的兩頭(tou)焊上(shang)兩個封(feng)(feng)(feng)頭(tou)做(zuo)容(rong)器用的一(yi)(yi)(yi)種產品(pin)。與(yu)之(zhi)類似的產品(pin)有盲(mang)板、管(guan)(guan)帽、堵頭(tou)等。不(bu)銹(xiu)鋼(gang)封(feng)(feng)(feng)頭(tou)的其他叫法：不(bu)銹(xiu)鋼(gang)無(wu)直邊封(feng)(feng)(feng)頭(tou)、桶(tong)體(ti)旋邊、橢圓(yuan)封(feng)(feng)(feng)頭(tou)、碟(die)形封(feng)(feng)(feng)頭(tou)、淺形封(feng)(feng)(feng)頭(tou)、各種大(da)小(xiao)頭(tou)旋邊、不(bu)銹(xiu)鋼(gang)大(da)小(xiao)頭(tou)旋邊、平底、半球(qiu)形旋邊、球(qiu)形封(feng)(feng)(feng)頭(tou)等。