... 1,Non-posion,corrision-resisting,high mechanical strengthk,low brittle temperature and long wearing,2,Little liquid resistance,uneasy-fouling, ... non-polluted to liquid but making larger effiecinet pipe diamete,3.100%-insulating from oxygen,thoroughly abolishing permeation, ... nature,suitable for gas-oil transferring and curving pipe or making pipe straight back.4.They are suitable for use ...