PVC-O管(guan)(guan)(guan)(guan)(guan)(guan)有很高(gao)(gao)的(de)(de)(de)MRS，但設(she)計的(de)(de)(de)概念管(guan)(guan)(guan)(guan)(guan)(guan)道(dao)管(guan)(guan)(guan)(guan)(guan)(guan)件(jian)管(guan)(guan)(guan)(guan)(guan)(guan)件(jian)焊(han)接鋼管(guan)(guan)(guan)(guan)(guan)(guan)壁厚(hou)時(shi)，必要(yao)時(shi)要(yao)考(kao)慮管(guan)(guan)(guan)(guan)(guan)(guan)道(dao)管(guan)(guan)(guan)(guan)(guan)(guan)件(jian)管(guan)(guan)(guan)(guan)(guan)(guan)件(jian)必要(yao)有可(ke)以(yi)(yi)的(de)(de)(de)環(huan)(huan)應力(li)(li)系(xi)數(shu)(shu)，以(yi)(yi)接受污(wu)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)時(shi)而高(gao)(gao)壓(ya)氣時(shi)應受到了(le)的(de)(de)(de)外(wai)學習壓(ya)力(li)(li)。利(li)用細(xi)則(ze)相(xiang)關規定，金屬制(zhi)(zhi)品(pin)管(guan)(guan)(guan)(guan)(guan)(guan)道(dao)管(guan)(guan)(guan)(guan)(guan)(guan)件(jian)管(guan)(guan)(guan)(guan)(guan)(guan)件(jian)環(huan)(huan)應力(li)(li)系(xi)數(shu)(shu)不應該大于(yu)4kPa。金屬制(zhi)(zhi)品(pin)管(guan)(guan)(guan)(guan)(guan)(guan)道(dao)管(guan)(guan)(guan)(guan)(guan)(guan)件(jian)管(guan)(guan)(guan)(guan)(guan)(guan)件(jian)應力(li)(li)系(xi)數(shu)(shu)測算數(shu)(shu)學公(gong)(gong)式下面：
S=(E en3 )/(12dn3 )，里(li)面：
S——環(huan)(huan)剛度系(xi)數(shu)(shu)，標(biao)準Pa;
E——應力(li)(li)松弛(chi)模量，基(ji)層單位(wei)為(wei)(wei)(wei)Pa; PVC-O的(de)(de)(de)應力(li)(li)松弛(chi)模量為(wei)(wei)(wei)4000MPa;
en ——公(gong)(gong)稱(cheng)(cheng)厚(hou)度，基(ji)層單位(wei)為(wei)(wei)(wei)mm;
dn ——公(gong)(gong)稱(cheng)(cheng)直勁，的(de)(de)(de)單位(wei)為(wei)(wei)(wei)mm;
從此(ci)計算出(chu)PVC-O塑(su)(su)(su)料(liao)(liao)管(guan)(guan)(guan)(guan)(guan)(guan)材各公(gong)(gong)稱(cheng)(cheng)網(wang)套直徑下的(de)(de)(de)厚(hou)度、SDR型(xing)(xing)號(hao)、S型(xing)(xing)號(hao)
PVC-O給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)是(shi)由于(yu)具備有很高(gao)(gao)的(de)(de)(de)追(zhui)求(qiu)(qiu)承(cheng)載(zai)力(li)(li)，在頂住負(fu)擔(dan)時(shi)，給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)壁就可(ke)以(yi)(yi)遠(yuan)遠(yuan)降(jiang)，相(xiang)對(dui) 1.17MPa以(yi)(yi)上內(nei)容的(de)(de)(de)給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)其實這些：公(gong)(gong)稱(cheng)(cheng)負(fu)擔(dan)低過1.17MPa時(shi)，PVC-O給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)比普(pu)通給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)(guan)壁遠(yuan)遠(yuan)降(jiang)的(de)(de)(de)時(shi)候(hou)，給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)環(huan)(huan)硬度金橋接地銅絞線(xian)——加塑(su)(su)(su)銅絞線(xian)無法(fa)追(zhui)求(qiu)(qiu)。如果(guo)相(xiang)對(dui) 公(gong)(gong)稱(cheng)(cheng)負(fu)擔(dan)值為(wei)(wei)(wei)1.17MPa的(de)(de)(de)給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)認為(wei)(wei)(wei)，從理論體系(xi)上PVC-O給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)壁要(yao)遠(yuan)低于(yu)普(pu)通給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)壁，但于(yu)此(ci)給(gei)(gei)水(shui)(shui)塑(su)(su)(su)料(liao)(liao)PE管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)環(huan)(huan)硬度達(da)不了(le)4kPa的(de)(de)(de)追(zhui)求(qiu)(qiu)。
但是(shi)，PVC-Opvc管(guan)(guan)(guan)(guan)(guan)(guan)材更適合應該用于(yu)公(gong)(gong)稱(cheng)(cheng)水(shui)(shui)壓(ya)多于(yu)相(xiang)等(deng)1.25MPa上面的(de)(de)(de)公(gong)(gong)共場合，而以(yi)(yi)及的(de)(de)(de)SDR/S型(xing)(xing)號(hao)為(wei)(wei)(wei)41/20。