I Humbly request you to advise on valve material selection based on pipe material , I am Factory sales engineer so I always get trouble on this regard.... If you can advise me any article about this will be highly appreciable.. If you have a stainless steel pipeline in a certain pressure class and ask for valves suitable for the given fluid and pressure class, you will often get the cheapest valve material offered, which could be epoxy coated nodular iron, or primed only common steel, as this could be adequate and with a long lifetime for the given application.If you explicit want offered 'all stainless steel valves' for the pipeline(at 3-10 times the price) you have to state this. In such cases you should specify for different options of valve materials to be able to select, at least at planning/evaluation project stage. Preferably use the piping specification to make the valve selection. This way a piping engineer has already done the real work regarding the fluid properties as well as the design pressure and temperature and the flange class. An easy exaple may be carbon steel. The piping may be specified as seamless ASTM A 106 grade B. The steel flanges are ASTM A 105. Perhaps a cast valve is A 216 WCB or WCC.

MORE NEWS