About JIS G3461 Steel Tube jis g3461 stb340 OD: 15.9mm ~ 139.8mm WT: 1.24mm-59.54mm, SCH5~SCH160,XXS Length: 5-12m Application: Hydraulic system pipeline pipe,Gas and Fluid Transportation, Mechanical Pipeline, power plant, etc. Supplementary Technology: Plain or threaded with socket, beveled with plastic caps, hydraulic testing, eddy current, ...