JIS seamless pipe is steel pipe that has been created by JIS and meets certain performance requirements. Manufacturers follow Japan Industrial Standards voluntarily.Japanese Industrial Standards (JIS) developed by the organization apply to a wide variety of industrial services and technologies such as automobiles, metallurgy, ships and medical equipment.JIS G3461 pipeJIS G3455 STS370JIS G3456 STPT370JIS G3441 Alloy tubeJIS G3454 STPG370JIS G3462 STB A12The method for making cold-drawn seamless pipes involves taking a round ‘billet’ or bar of steel and boring it in the center, turning it, cutting it, heating it to make it more pliable, then ‘drawing’ it (extruding or pulling it) to make it a longer and thinner tube.JIS seamless pipe according to alloy, stainless steel or carbon. It tests steel’s properties, hardness, resistance to corrosion, pitting, heat treating processes and others. The results are listed in a main JIS steel grade for steel pipe as below.JIS G3429Steel grade:STH38, STH55, STH67Application: Seamless Steel Tubes in High Pressure Gas CylinderJIS G3439Steel grade: STO-G, STO-H, STO-J, STO-N, STO-C, STO-D, STO-EApplication: Seamless Steel Oil Well, Casing, Tubing and Drill PipeJIS G3441Steel grade:SCr 420TK, SCM415TK, SCM418TK, SCM420TK, SCM430TK, SCM435TK, SCM440TKApplication:Alloy Steel Tubes for General Structural PurposeJIS G3444Steel grade: STK 30, STK 41, STK 50, STK 51, STK 55Application: Carbon Steel Tubes for General Structural PurposeDimension Range: 21.7-1016.0 mmJIS G3445Steel grade: STKM11A,STKM12A, STKM12B, STKM12C, STKM13A, STKM13B, STKM13C, STKMI4A, STKM14B, STKM14C, STKM15A, STKM18C, STKM16A, STKM18C, STKM17A, STKM17C, STKM18A, STKM18B, STKM18C, STKM19A, STKM19C, STKM20AApplication: Carbon Steel Tubes for Machine Structural PurposesJIS G3454Steel grade: STPG 38, STPG 42Application: Carbon Steel Pipes for Pressure ServiceDimension Range: 10.5-660.4 mmJIS G3455Steel grade: STS 38, STS 42, STS 49Application: Carbon Steel Pipes for High Pressure ServiceDimension Range: 10.5-660.4 mmJIS G3456Steel grade: STPT 38, STPT 42, STPT 49Application: Carbon Steel Pipes for High Temperature ServiceDimension Range:10.5-660.4 mmJIS G3458Steel grade:STPA 12, STPA 20, STPA 22, STPA 23, STPA 24, STPA 25, STPA 26Application: Alloy Steel Pipes for ServiceDimension Range:10.5-660.4 mmJIS G3460Steel grade:STPL 39, STPL 46, STPL 70Application: Steel Pipes for Low Temperature ServiceDimension Range:10.5-660.4 mmJIS G3461Steel grade:STB 35, STB 42, STB 52Application: Carbon Steel Boiler and Heat Exchanger TubesDimension Range:15.9-139.8 mmJIS G3462Steel grade: STBAl2, STBAM, STBA20, STBA22, STBA23, STBA24, STBA25, STEA26Application:Alloy Steel Boiler and Heat Exchanger TubesDimension Range: 15.9-139.8 mmJIS G3464Steel grade: STBL 39, STBL46, STBL 70Application: Steel Heat Exchanger Tubes for Low Temperature ServiceDimension Range: 15.9-139.8 mmJIS G3465Steel grade: STM-055, STM-C65, STM-R60, STM-1170, STM-1180, STM-R85Application: Seamless Steel Tubes for DrillingDimension Range: Casing: 43-142mm / Hollow Pipes: 34-180mm / Drilling:33.5-50mmJIS G3467Steel grade: STF 42, STFAl2, STFA22, STFA23, 5TFA24, STFA23, STFA26Application:Steel Tubes for Fired HeaterDimension Range:60.5-267.4mmMeasurement size & TestingJIS seamless pipe testing covers many specifications, including alloy, size, toughness and composition. Those using steel products purchase the product that fulfills the requirements they need for what they are building.We have the professional engineers, measurement the size of steel pipes.And then calculate a steel pipe and tube theoretic weight.Packing:Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.Delivery:Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.Weight of bundle – up to 5000 kg upon request of customer.Each bundle is furnished with three tags.
