... 1.5-36Boiler pipes for refinery, heat-exchanging pipes, seamless steel pipes for pipelineHigh-pressureSeamless pipes for fertilizer making equipment20, ... boiled pipe10,20GB3087-199910-530*2-40Over-heat pipe for low and medium pressure boiler, boiling water pipe, locomotive ... propThe flow chart of production processOur certificate Some information for your reference1.MOQ: 3 Ton2.Delivery time: about ...