I-ASTM A420 ingukucaciswa okujwayelekile kokufakwa kwamapayipi kwensimbi ye-carbon kanye nensimbi ye-alloy esetshenziselwa izinsizakalo zokushisa eziphansi. I-WPL6 iyinto esetshenziswa kakhulu yebanga elingaphansi kwe-A420.
Ngaphandle kweBanga le-WPL6, i-Standard ifaka futhi i-WPL9, i-WPL3, i-WPL8, izinga lokushisa lomthelela, lokushisa lokuhlola ngokulandelana ku -45¡en, -195¡æ, -195¡æ, -195¡¬, -195¡¬, -195¡¬, -195¡¬, -195¡¬, -195¡å¡¬.