Our main products include: 1. seamless steel pipes, 2. hot-finished pipes, 3. welded steel pipes, 4. pipe fittings. ItemMaterialStandardSpecification(OD*WT)mmUsageAlloy pipe35CrMoCr5Mo15CrMo12Cr1MoV ... , Cr9Mo GB9948-8810-530*1.5-36Boiler pipes for refinery,heatexchangeing pipes,seamless steel pipes for pipelineHigh-pressureSeamless pipes for fertilizer making equipment20, 16Mn,Q345GB6479-200018-530 ...