1. Uma ukhetha ukwesekwa kwephayiphi kanye ne-hanger, ukwesekwa okufanele kanye ne-hanger kufanele kukhethwe ngokuya ngobukhulu bomthwalo kanye nesiqondiso sendawo yokusekela, ukufuduka kwephayiphi, ukuthi izinga lokushisa lokusebenza livikelwe futhi libanda, kanye nezinto zephayiphi:

2. Lapho kuklanywa izisekelo zamapayipi kanye neziphanyeko, kufanele kusetshenziswe iziphanyeko zamapayipi ezijwayelekile, izisekelo zamapayipi kanye neziphanyeko zamapayipi ngangokunokwenzeka;

3. Izisekelo zamapayipi ezihlanganisiwe kanye neziphanyeko zamapayipi zigcina insimbi kunezisekelo zamapayipi ezihlanganisiwe kanye neziphanyeko zamapayipi, futhi zilula ukuzikhiqiza kanye nezindlela zokwakha. Ngakho-ke, ngaphandle kwalezi zimo ezilandelayo, iziphanyeko zamapayipi ezihlanganisiwe kanye neziphanyeko zamapayipi kufanele zisetshenziswe ngangokunokwenzeka;

1) Amapayipi enziwe ngensimbi yekhabhoni anezinga lokushisa eliphakathi epayipini elilingana noma elingaphezu kwama-degrees angu-400;

2) ipayipi lokushisa eliphansi;

3) Amapayipi ensimbi e-alloy;

4) Amapayipi adinga ukudilizwa nokulungiswa njalo ngesikhathi sokukhiqiza;