Kwihlabathi elihlala liguquka lokwakha kunye nezicelo zemizi-mveliso, imibhobho yentsimbi engenamthungo ibe yinxalenye ebalulekileyo ngenxa yokusebenza kwayo okugqwesileyo kunye nokuthembeka. Le mibhobho isetyenziswa ngokubanzi kumashishini ahlukeneyo, afana nepetrochemical, ukuveliswa kwamandla, kunye nokuvelisa, ngenxa yesakhiwo sayo esingenamthungo kunye neempawu ezikhethekileyo.

II-ASTM A335 P5, P9, kunye ne-P11 iipayipi zensimbi ezingenamthungo zifunwa kakhulu ngamabakala aziwa ngokuba nobushushu obuphezulu kunye nokumelana noxinzelelo. Le mibhobho isetyenziswa kakhulu kwiindawo zokuhluza, kwiindawo zokutshintshisa ubushushu nakwimizi-mveliso yombane, apho idlala indima ebalulekileyo ekuthutheni ulwelo olushushu neegesi ngokukhuselekileyo nangendlela efanelekileyo.

Kwelinye icala, carbon steel imibhobho ingenamthungo, ezifanaI-ASTM A106kunye neetyhubhu zebhoyila ezifanaGB 8162 10#, zaziwa ngezicelo zazo ezijoliswe ngokubanzi. Imibhobho ye-ASTM A106 isetyenziswa ngokubanzi kwizicelo zoxinzelelo oluphantsi kunye noxinzelelo oluphakathi njengemibhobho, ngelixa i-GB 8162 10 #.iityhubhu kwibhoyilazithandwa kumashishini ahlukeneyo ngenxa yokukwazi ukumelana namaqondo obushushu aphezulu kunye noxinzelelo, nto leyo ezenza zilungele ukufakela kwibhoyila.

Inkqubo yokuvelisa ingenamthungo yongeza amandla ale mibhobho kwaye ishenxisa iindawo ezibuthathaka, iyenza ukuba ingachaphazeleki kakhulu kukuvuza nokugqabhuka phantsi kweemeko zoxinzelelo oluphezulu. Ukongeza, indawo yabo yangaphakathi egudileyo iququzelela ukuhamba kwamanzi okungathintelekiyo, ukunciphisa ukulahleka kwamandla ngexesha lokuhamba.

Njengoko imfuno yezisombululo zemibhobho ehlala ixesha elide kunye nesebenzayo iqhubeka nokunyuka, ukusetyenziswa kwe-A335 P5, P9, P11, ASTM A106, kunye ne-GB 8162 10# imibhobho yentsimbi engenamthungo isetelwe ukukhula ngokubonakalayo kuwo wonke amashishini kwihlabathi jikelele. Abavelisi kunye nabasebenzisi bokugqibela ngokufanayo baya kuqaphela ngakumbi ukubaluleka kwale mibhobho yensimbi engenamthungo ekuqinisekiseni impumelelo kunye nobomi obude beeprojekthi zabo.