Thank you for the response, But i can't able to find it in any standard that for dual grade we have to go for higher test pressure,
Please advise the standard reference if any.
Hi,
We have an valve requirement of Dual material grade with CF8M/CF3M, when we do pressure testing for this valve, as per API 598 shell test shall be 1.5 times of maximum allowable pressure at 38 °C (100 °F)and seat test shall be 1.1 times of maximum allowable pressure at 38 °C (100 °F).
When...
WE HAVE AN REQUIREMENT FOR CARBON MOLYBDENUM STEEL, AS PER ASTM A352 CARBON MOLYBDENUM STEEL IS LC1 MATERIAL(CAST GRADE), IF WE USE FORGED FORM OF CARBON MOLYBDENUM STEEL THEN WHICH WILL BE THE CORRECT MATERIAL, AS I CHECKED THERE IS NO EQUIVALENT FORGED GRADE FOR CARBON MOLYBDENUM STEEL.