New Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 4) which is identical with IEC 60154-4 : 2017 Flanges for waveguides - Part 4: Relevant specifications for flanges for circular waveguides’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on recommendation of the Wires, Cables, Waveguides and Accessories Sectional Committee and approval of the Electronics and Information Technology Division Council.

IS 10738 (Part 4/Sec 1) : 1991 was published in 1991 and assistance were derived from IEC Pub 154-4 : 1969. Another Standard IS 10738 (Part 4/Sec 2) : 1992 was published in 1992 and assistance were derived from IEC Pub 154-4 : 1969. This superseding is being done to align it with the latest version of IEC 60154-4 : 2016. On publication of this Standard, IS 10738 (Part 4/Sec 1) : 1991 and IS 10738 (Part 4/Sec 2) : 1991 stands withdrawn.