ASTM A203, Grade B for Propane Tanks
ASTM A203, Grade B for Propane Tanks
(OP)
Dear Sir/Madam,
For your kind information in our Project (BID Boland II-Iran) , we have two Propane Storage Tanks (50,000 m3,each , Temp.-50c). The material for these Tanks in our Contract is ASTM A203 Grade B , but in our normal practice we have used ASTM A 573.I will be highly appreciated , If anyone could clarify for me, any advantages of ASTM A203 Grade B(If any) and Please let me know that do you recommend this Material for the said Propane Tanks or not? Thanks in advance. Best Regards
For your kind information in our Project (BID Boland II-Iran) , we have two Propane Storage Tanks (50,000 m3,each , Temp.-50c). The material for these Tanks in our Contract is ASTM A203 Grade B , but in our normal practice we have used ASTM A 573.I will be highly appreciated , If anyone could clarify for me, any advantages of ASTM A203 Grade B(If any) and Please let me know that do you recommend this Material for the said Propane Tanks or not? Thanks in advance. Best Regards





RE: ASTM A203, Grade B for Propane Tanks
ASTM A 203 is a nickel alloy steel plate for welded pressure vessels. Typically used for pressure vessels in moderate to low temperature service.
ASTM A 573 is only a structural quality grade carbon steel plates for improved toughness. There is no nickel addition which is used to improve notch toughness.
If you are using ASME Section VIII, Div 1 for construction of the storage tanks, use the A 203 pressure vessel quality steel.
RE: ASTM A203, Grade B for Propane Tanks
Thanks
RE: ASTM A203, Grade B for Propane Tanks
Well, thanks for the clarification. In my opinion, I have serious doubt about having sufficient notch toughness at -50 deg C (-58 deg F) as your MDMT. You will need to conduct impact testing per the requirements in Table 4-1 of API 620. ASTM A 573 is carbon steel plate with increased notch toughness. You have no nickel in this steel and you are relying on a fine grain practice to achieve suitable notch toughness at lower temperature service.
My recommendation still stands that I would go with A 203 plate for this storage tank to ensure adequate notch toughness at your stated MDMT.
RE: ASTM A203, Grade B for Propane Tanks