There are lots of different types of door hinges, so we are going to name and describe a few of them for you!
Strap Hinges - A hinge with two long straps; one is fixed onto the surface of a moving part and the other is fastened to the stationary frame of the door. Strap hinges are an earlier hinge and are used on many kinds of doors and cabinets.
Piano/Continuous Hinges - This type of hinge runs the entire length of the door, panel or box. They are manufactured with or without holes and come in various pin diameters, knuckle lengths and thicknesses. A Piano Hinge adds strength and stability to furniture that gets a lot of use and easily bears the weight of heavy lids and doors. It is made of metal such as stainless steel or brass with closely spaced screws and it can be concealed on the underside or back of an object.
Butterfly/Dovetail Hinges - A Butterfly Hinge has a butterfly like shape and a decorative finish that makes it visually interesting. This particular design is suitable for applications where the hinge will be visible. The precise shape of a Butterfly Hinge can vary by manufacturer but it tends to look like the wings of a butterfly, spreading from the centre pin. Ornamental finishes may include a variety of textures, scrollwork or embossing. Some dovetail hinges are finished in enamel to leave a coloured appearance.
Pivot Hinges - A hinge with a short fixed shaft or pin upon which a part rotates or swings, most commonly used for cabinet doors.
Flag Hinges - A Flag Hinge can be taken apart with a fixed pin on one leaf. They could spin a full 360 degrees around the pin; they are manufactured in a right hand and a left hand configuration.
H Hinges - Shaped like an H, small H hinges tend to be used for cabinet hinges, while larger hinges are for passage or closet doors.
HL Hinges - Large HL hinges were common for passage, room and closet doors in the 17th, 18th and even 19th centuries. On taller doors, the previously mentioned H hinges were occasionally used in the middle alongside the HL hinges.
Butt Hinges - Usually in threes or fours, which are inset into the door and frame. Most residential hinges are made of steel although hinges for exterior doors are often made of brass or stainless steel to prevent corrosion.
Case Hinges - Case Hinges are similar to a Butt Hinge. However, they usually have more of a decorative nature and are most commonly used in suitcases, briefcases etc.