flexible connection  Firmness and rot- resistance; Need no welding; Without fire danger; Saving space; no limit on a pipe; non-stop plugging, convenient installation
2 Application field :

ground surface and underground engineering, Platform for ship building/ marine/ petroleum,water, supplies for coal gas/ natural gas, electric power, industrial production, Wastewater Treatment, and maintenance, etc.
3  Application of pipe line:

crude oil pipeline, coal gas pipeline, natural gas pipeline, Water Supply and Drainage pipeline, fuel pipeline, aviation and automobile only pipeline, lubricating oil pipeline, sludge pipeline, suction pipeline , water flush power pipeline, Cable Protection pipeline, Seawater/Fresh Water pipeline, Turbine pipeline, air conditioning pipeline, fire control pipeline , vent pipe pipeline, compressed air pipeline.