Hotel pans, also called steam-table pans, are rectangular food-service containers supplied in full-size and fractional footprints and several depths. They fit compatible steam tables, buffet equipment and preparation stations. Material and manufacturer determine whether a pan is suitable for oven use.
US hotel-pan dimensions and Gastronorm dimensions are similar but not universally interchangeable. Check actual measurements, lid fit and equipment specifications. Pan depth also affects how quickly food can undergo rapid cooling.
Reference: Further reading.