Gradd Dur: Q195-Q345, S235JR, GR.BD, STK500 Safon: GB/T3091–2001, BS1387–1985, DIN EN 10025, EN10219, JIS G3444: 2004, ASTM A53 SCH40219-2004, ASTM A53 SCH40219/802 Arwyneb Gorffen: cyn galfanedig, edau, soced, ysgythru, paentio Diamedr allanol (modfedd): 1/2'' - 4'' Trwch ...
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