ISO(International organization for Standaridization)
ISO 65 / Carbon Steel Tubes Suitable for Screwing in Accordance with ISO 7/1 (TS/TW)
ISO 559 / Welded or Seamless Steel Tubes for Water Sewage and Gas
(TSO/TWO/TS1/TW1/TS4/TW4/TS9/TW9)
ISO 2604-2 / Steel Products for Pressure Purposes PART2 Wrought Seamless Tubes
(TS1/TS2/TS4/TS5/TS6/TS9/TS9H/TS10/TS13/TS14/TS15)
ISO 2604-3 / Steel Products for Pressure Purpose Parts Electric Resistance and Induction Welded Tubes
(TW1/TW2/TW4/TW5/TW6/TW9/TW9H/TW10/TW13/TW14)
ISO 2604-5 / Steel Products for Pressure Purposes PART5 Longitudinally Welded Austenitic stainless Steel
Tubes (TW46/TW47/TW50/TW53/TW57/TW58/TW60/TW61/TW69)
ISO 2937 / Plain End Seamless Steel Tubes for Mechanical Application (TS1/TS4/TS9/TS18/C35)
ISO 2938 / Hollow Steel Bars for Machining (Gr1/Gr2)
ISO 3183 / Oil and Natural Fas Industries Steel Line Pipe (E17/E21/E24-1/E24-2)
ISO 3304 / Plain end Seamless Precision Steel Tubes (R28/R33/R37/R42/R50)
ISO 3305 / Plain end Welded Precision Steel Tuves (R28/R33/R37/R44/R50)
ISO 3306 / Plain end as Welded and Sized Precision steel Tubes (R28/R33/R37/R44/R50)