The optimal time for steaming crabs varies depending on the size of the crab. Generally speaking, if you use an ordinary pot to steam crabs, crabs under three taels need to be steamed for about 10 minutes, and crabs between 3 and 4 taels need to be steamed for about 12 minutes, with each additional one or two taels needing an additional 2 minutes. Steaming with a pressure cooker is faster, taking only about 8 minutes. Steaming crabs to steam 15 minutes appropriate, the majority of food verification, found that 15 minutes is the best time to steam crabs. 1, crabs should be steamed for about 30 minutes appropriate. 2, in general, all normal block head of hairy crabs only need to steam for thirty minutes up and down, to be boiled to take possession of the water for ten minutes, the water is boiled and then need to be steamed for fifteen minutes to twenty minutes up and down. 3, but there are exceptions, if the hairy crabs However, there are exceptions, if the hairy crab is very large words, then need to steam a little longer, but it is recommended to control as much as possible in an hour, in order to prevent the steam time is too long and give the flavor impact.