DS DS 2199.4
DS DS 21994 1984-JAN-01 PEM and PEH ppelnes - Flanged connecton for PEMPEH ppes to steel or cast ron ppes for gas dstrbuton - Requrements and testng Replaced by DS DSSO 10838-2 DS DSSO 10838-3
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This standard lays down requiremnets for flange connections between PEM/PEH pipes to steel or cast iron pipes for gas distribution. Requirements and testing.