Hanson oil pots are built and tested in accordance with the A.S.M.E. boiler and pressure vessel code section VIII division I for unfired pressure vessels and bear "UM" stamp and serial number. A copy of A.S.M.E. data sheet U1A, signed by an A.S.M.E. authorized inspector, will be sent with the invoice if requested at time of order.

Hanson Oil Pots meet Cal/OSHA Safety Orders Title 8, Article 2, Section# 458 rules for ammonia vessels. This includes at least spot x-ray, .1875" minimum material thickness and stress relieving the heads before fabrication. Ours are rated for 350# working pressure at -50 degrees F, by post weld stress relieving the entire vessel. Exterior paint system is power buff to SSPC-SP3 plus one coat 2/3 mil dft rust resistant primer.

Oil pots are guaranteed free from defects in material and workmanship for one year from the date of shipment, FOB our factory. Full limited warranty terms are available on request.