Betts weld flanges are designed for use on cargo tanks with bolt-hole patterns in accordance with TTMA recommended practices. Flange performance is dependent on proper weld procedures with an achievable MAWP of 75 psi [5.2 bar] for steel and stainless and 50 psi [3.4 bar] for aluminum.
For additional information on Betts products and Proposition 65 list please see: https://www.bettsind.com/proposition-65/