The varieties of socket fittings include 45 ° elbows, 90 ° elbows, tees, crosses, 45 ° angled tees, double socket pipe clamps, single socket pipe clamps, pipe caps, flexible joints, branch pipe seats, etc. Among them, three-way and four-way can be divided into equal diameter and different diameter; Double socket pipe clamps can also be divided into equal diameter and reduced diameter, and reduced diameter double socket pipe clamps can also be classified as concentric or eccentric.
　　Plug in fittings are mainly a type of high-pressure elbow pipe connection accessory that is formed by molding and forging blanks from round steel or steel ingots, and then processed by lathe machining. It is a type of forged socket elbow series pipe fittings. Common standards for socket elbows include GB/T14383, GB/T14383, American standard ASME B16.11, petrochemical standard SH3410, and Ministry of Chemical Industry standard HG/T21634. According to the form, it is divided into 45 ° socket elbows and 90 ° socket elbows. The specifications of socket elbows are as follows: DN6、DN8、DN10、DN15、DN20、DN25、DN32、DN40 、DN50、DN65、DN80、DN100。 The commonly used ordering specifications are DN15~DN50. Divided by pressure level: 3000LB, 6000LB, 9000LB or SCH80, SCH160, XXS.
　　Mainly suitable for departments and fields such as petrochemicals, pharmaceuticals and healthcare, electricity, aerospace, military industry, fire protection, metallurgy, shipbuilding, gas, nuclear power, and environmental protection that require high pressure and precise dimensions.