A41H Type are used for the equipment and pipeline of the petroleum gas ,air water etc medium what the working temperature are less than 300 degree Celsiur ,A41Y-P/R type are used for the equipment and pipline of the quality with corrode medium what the working temperature are lesss than 200 degree Celsiur Take for extra pressure devies.

Flange connectiong dimensions of comply with standard series one of JB/T94