AWWA C207-07 ke tekanyetso e phatlalalitsoeng ke American Water Works Association (AWWA) e hlalosang boholo, mamello, le lisebelisoa tsa liphaephe tsa tšepe tse sebelisoang lits'ebetsong tsa metsi. Li-hub flange tsa Class D li etselitsoe lisebelisoa tse itekanetseng ho isa ho tse phahameng ka har'a tsamaiso ea metsi.
Li-hub tsa Sehlopha sa D li arotsoe ho ipapisitsoe le likhatello tsa tsona tsa khatello 'me hangata li sebelisoa libakeng tsa ho hloekisa metsi, litsing tsa metsi a litšila, le marang-rang a phepelo ea metsi a masepala. Li-flange tsena li etselitsoe ho fana ka khokahanyo e matla le e sireletsehileng pakeng tsa lipeipi, li-valve le li-fittings lits'ebetsong tsa metsi.
Ho AWWA C207-07, li-hub tsa Sehlopha sa D li hlalositsoe ho ipapisitsoe le litekanyo tse fapaneng, ho kenyelletsa bophara ba flange, bophara ba lesoba la bolt, bophara ba selika-likoe sa bolt, litekanyo tsa hub, litekanyo tse shebaneng le botenya. Litlhaloso tsena li netefatsa hore li-flange li finyella litekanyetso tse hlokahalang le ho fana ka tlhophiso e nepahetseng le ho tiisa ha li hokahane le mekhoa ea liphaephe.
Li-hub tsa sehlopha sa D hangata li etsoa ka thepa e kang tšepe ea khabone kapa tšepe e sa jeleng paate ho netefatsa ho tšoarella le ho hanyetsa ho bola ha metsi. Sebaka se phahamisitsoeng bohareng ba flange se fana ka matla a eketsehileng le ts'ehetso ha o hokela liphaephe kapa li-valve.
Ka kakaretso, li-hub tsa AWWA C207-07 tsa Sehlopha sa D ke likarolo tsa bohlokoa lits'ebetsong tsa kabo ea metsi, tse fanang ka khokahano e tšepahalang le e sa luleng bakeng sa meaho ea lipeipi litsing tsa kalafo ea metsi le marang-rang a phepelo ea metsi a masepala.
