Product Name: DIN2391 Cold Drawn Seamless Carbon Steel Skived and Roller Burnished Pipe Model NO.: Seamless Tube Connection Type: Seamless Cross-Section Shape: Round Medium: Liquid Diameter: 273mm Standard: ASTM, GB, API, DIN, JIS Material: Carbon Steel MPa Classfication: High Pressure Piping Temperature Classification: Room Temperature Piping Trademark: Deshun Transport Package: Bundle Packing, Slightly Internal and External Oi Specification: ID: 30-299 Origin: China HS Code: 841290 Product Description DIN2391 Cold Drawn Seamless Carbon Steel Skived and Roller Burnished Pipe isthemainpartofthehydrauliccylinder.Theinnerholeofthehydrauliccylindertubeusuallyprecisionprocessedbyboring,reaming,rollingorhoning.Bytheseprocesscanensurethepiston,sealingelementsandthesupportelementsmovesmoothly,thenensurethesealingeffectandreducetheabrasion.Thehydrauliccylindertubewillbearbigpressure,soneedhighstrengthandstiffness.Honed tubes can be produced according to the demands of costumers that the degree of precision can reach H8/H9. Burnishing and honing service can be provided depending on the roughness requirement of inner diameter.Specification:StandardDIN2391, EN10305, ASTM A519, GB/T 8713 etc.MaterialST45, ST52, E355, E355SR, STKM13C, 27SiMn SAE1020, C20Q235B, CK45, etc.HeattreatmentBK+S conditionSpecificationOuterdiameter(mm) Innerdiameter(mm) 50-37740-320I.DToleranceH8~H9Length3-9 Mtr(Suggested length 3-5.8 Mtr suitable for 20' container)Straightness0.3/1000IDroughnessRA0.4 micron(max)TechnologyHoning / Cold Drawn / Boring and RollingScopeHoned tubefor hydraulic cylinder, crane,injectionmachineandconstructionmachineapplicationProduction process:Applications:Company Profile:Jiangyin Deshun hydraulic machinery Co., LTD, is located in the Yangtze river delta-jiangyin. Company south by Wuxi, with the Yangze river in the north, traffic developed. JingHu, HuNing, along the river highway, and Xuxiake road across our company, borders on Shanghai economic radiation zone.Company was founded in 1999.We mainly produceCylinder, Cold Drawn Tubes, Honed Tube, Piston Rod, and machinery manufacturing, the annual output reaches over 20000 tons. Our company has advanced equipment and strong technical force. Complete with various kinds of advanced producions equipment and technology.Certificates:FAQ:1. How long time is the shortest delivery?For stock material,the delivery time is just 3-5 working days.And for customized product,it will takes 25-35 working days based on different size and quantity.2. What kind ofPaymentdoes your company support?CFR/CIF: 30% T/T in advance, balance paid against the copy of B/L,andalso we can accept EXW, FOB.3. Do you charge for theSamples?According to our company principle, free charge for samples, you pay for the freight charge4. How to know theQualityGuarantee?Visit Our factory is the best way to know each other moreISO9001:2018 by international quality system Certificate and The Third Inspection can prove our qualityWe will attach some relevant photos via email so show our factory, machine and products for you5.May ICustomizethe steel pipe?Sure you can, we can produce according to your requirement, you can send the CAD ordesign drawing.6.Any value-addedServices?Fortunately for you,we are very experience in this industry. We have equipped our warehouse with the necessities to perform in-house oiling,coating,pipe cutting, etc.