JIS Seamless Pipe - Seamless Steel Tube

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 pipe
JIS G3455 STS370
JIS G3456 STPT370
JIS G3441 Alloy tube
JIS G3454 STPG370
JIS G3462 STB A12

The 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.