Lwc coil Level wound coils are especially suited to long production runs for industrial applications and are available in ultra-thin walls as per astm, en (bs), jis standard. Most commonly supplied in the annealed form with weight 30-200kgs per coil. Packing with wooden pallet. (1)copper tube for air-conditioning and refrigeration field service astm b280, en1057, as1571, jis300 (2)copper tube for general engineering application astm b75, en1057, as1571, jis300 (3)copper tube for refrigeration, oil lines, gasoline lines astm b68, en1057, as1571, jis300