Ukufaneleka kwebanga le-ASTM A105 kukhiqizwa ngokucaciswa kwensimbi engenamthungo. Ama-ASTM A105 Fittings aklanywa ngokuqukethwe kwamakhemikhali kwe-nickel, i-chromium, molybdenum, ithusi kanye ne-vagadium. Lolu sizo olufanelekile ekuxhumaniseni amamaki ahlukene amapayipi embonini kawoyela negesi.