TC331
- Highway tank for liquefied compressed gases (e.g., LPG, NH3)
- Seamless or welded, or a combination of the two
- Steel or aluminum
- Design pressure shall be at least 690 kPa (100 psi) and not more than 3450 kPa (500 psi)
TC338
- Insulated highway tank for gases as refrigerated liquidfied gases
- Supported welded inner vessel enclosed within a jacket
- Insulation may be by vacuum
- Design pressure shall be at least 180 kPa (26 psi) and not more than 3450 kPa (500 psi)
TC341
- Insulated highway tank for nonflammable refrigerated liquidfied gases
- Optional pressure control valve vessel set at or below 174.4 kPa (25.3 psi)
- Supported inner vessel enclosed within a jacket
- Insulation between the inner vessel and jacket
- Insulation may be by vacuum
- Maximum Allowable Working Pressure (MAWP) shall be at least 174.4 kPa (25.3 psi) and no more than 1034.2 kPa (150 psi)
TC406
- Highway tank for flammable liquids and low chemicals
- Steel or aluminum shell or fibre-reinforced plastic (FRP)
- MAWP between 18 and 28 kPa (2.65 and 4 psi)
- If transporting crude, MAWP between 18 and 101.3 kPa (2.65 and 14.7 psi)
TC407
- Highway tank for toxic, corrosive and flammable liquids
- Circular cross-section
- MAWP of at least 172 kPa (25 psi)
- Over 235 kPa (35 psi or vacuum loaded), shall be ASME-certififed
- May be vacuum loaded if external design pressure is at least 103 kPa (15 psi) and internal design pressure is at least 173 kPa (25 psi)
- Steel, aluminum or FRP
TC412
- Highway tank for corrosive and some flammable liquids
- MAWP of at least 35 kPa (5 psi)
- MAWP greater than 104 kPa (15 psi) shall be circular cross-section and ASME-certified
- Steel, aluminum or FRP
- May be vacuum loaded if external design pressure is at least 103 kPa (15 psi) and internal design pressure is at least 173 kPa (25 psi)
TC423
- Highway tank for emulsion and water-gel explosives
- MAWP of at least 35 kPa (5 psi) but not more than 103 kPa (15 psi)
- Steel or aluminum
- Hopper style configuration accommodated
- May be insulated
