Lokhu kufakwa okuvame ukusetshenziswa kumapayipi okucindezela kanye nemikhumbi yengcindezi \ amathangi emazingeni okushisa aphansi.
I-ASTM A105, eyaziwa nangokuthi yi-carbon steel, iyi-alloy ye-iron-carbon nge-carbon yangaphakathi ye-carbon cishe ngamaphesenti amabili.
Ukufakwa kwamazinga okushisa kwensimbi okuphansi kukhiqizwa ngaphansi kokujwayelekile futhi okunomoya, okwenziwe ngezinto ezijwayelekile, okuhlangenwe nakho noma okucishiwe futhi okunolaka futhi okunolaka futhi okunolaka. Abakhiqizi abaningi bangakhiqiza ukufakwa okufana ne-SA 420 wpl6 elbow njengoba kudingwa ngabathengi abathile. Isizathu esisodwa sokwamukelwa kwe-A420 WPL6 Fittings ukuthi bangenziwa batholakale kububanzi obukhulu, usayizi, ubukhulu kanye nobukhulu. Ukufakwa kwamapayipi we-welded, i-welding yenzeka ngaphambi kwenqubo yokwelashwa kokushisa. I-A420 Ibanga le-WPL6 lingenye yezinto ezisetshenziswa kakhulu ezibonakalayo ebangeni le-A420.