ASTM A420 ndiyo matsikirwo emapipi emapipi ecarbon simbi uye alloy simbi inoshandiswa kune yakadzika tembiricha. Wpl6 ndiyo inonyanya kushandiswa giredhi zvinyorwa pasi peA420.
ASTM A420 WLL6 PIPE Fittings inoumbwa neCarbon Steel Alloy yakagadzirwa neCarbon, Manganese, Phesphorous, Sulfa naSiliton.