IS 1161 : 2014 Standards applies to steel pipes for Structural purposes. It covers a diameter range right from NB 15 mm to NB 350 mm. Utkarsh have the full production facility for the sizes. This standard is widely used in beams and other structural purposes. Utkarsh India Ltd. have the license to produce IS 1161 : 2014 from Bureau of Indian Standards under certification mark no. CM/L – 5117652 Utkarsh duly marks his pipe by embossing : – “BANSAL “UTKARSH” “ISI LOGO” “IS 1161” “CM/L NO.