Changzhou Hongtai Precision Steel Pipe Co. is subsidiary of Zhenzhou Hongtai Steel Pipe Group, it has independent import and export rights, the company owns a professional team, provides the best service to our customers.Product NameH7 honing pipeH8 honing pipeTolerance on ODID 30mm, +21,0mm;ID:30-50mm,+25,0mm; ID:50-80mm, +30,0mm;ID:80-120mm, +35,0mm;ID:120-180mm, +40,0mm;ID:180-250mm, +46,0mm; ID:250-315mm,+52,0mm; ID:315-400mm,+57,0mmID 30mm, +33,0mm;ID:30-50mm,+39,0mm; ID:50-80mm, +46,0mm;ID:80-120mm, +54,0mm;ID:120-180mm, +63,0mm;ID:180-250mm, +72,0mm; ID:250-315mm,+81,0mm; ID:315-400mm,+89,0mmMaterial20#,45#,Q345B,Q345D,25Mn,27SiMn,E355StandardGB/T3639-2009, GB/T8713, EN10305-1:2002, EN10305-2:2002, ASTM A519-2006; ASTM A513-2007, GB/T1591-2008, GB/T17396-2009LengthAs customer s requestPackagingStandard export packing, packed in woven bags, with two nylon slings, or can be customized as requestHeat Treatment/      Delivery ConditionCold finished and stress-relieved annealing BKS(+SR)Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.Delivery TimeWithin 35-50 days from receiving depositPayment Term100% L/C at sight or 30% deposit, 70% balance against copy of B/LUsage/ApplicationPipes for hydraulic cylinder, pneumatic cylinder, petrifaction oil pump,etcMain MarketAsia, Middle East, Europe, etc.