... ; and improve the resistant abrasion ability and the average service life can reach 25,000 to 30,000 cubic meter of ... to rupture and blows out .With special treatment, their service life are remarkbly prolonged , and can be up to 50000-80000 ... dual wall pipe has the advantage of safety, longer work life, energy saving, continuum, low maintenance.4. bimetal abrasion resistant steel pipes ...