What causes sausages to burst?

Online Answer
Sausages split because pressure builds up on the inside as they cook (typically from vapor produced by the heat, but also from the expansion of the foody goodness inside). ... When the stress in the casing reaches a critical value, it fails catastrophically and the sausage bursts.
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There are many ways to cook sausages, but cooking them in the oven is often the simplest method. You don't have to stand over them, turning them in a frying pan or on the grill. And cooking them on foil means easy clean-up. ....
Cooking Frozen Sausages Has never been easier, than making them in your air fryer. Simply add them frozen to the air fryer basket or tray, and set the temperature. It's so easy, I am usually busy making eggs, while the sausages are air frying. This makes for a great time saver.
Sausages can also be baked in the oven (a good method to use if you're cooking something else in the oven). Preheat the oven to 190°C, gas mark 5..
about 12 minutesHeat oil in a large skillet over medium heat until hot but not smoking. Cook sausages, turning, until well browned but still slightly pink in center, about 12 minutes..
Sausages can be cooked in numerous ways. In general, boiling and baking are the healthiest methods, as they don't require much oil. However, pan- and stir-frying are good options as long as you choose a healthy oil. Conversely, deep frying is the least healthy way because of the fat and calories it adds.