Sleeve (construction)

A sleeve is a device for uninterrupted connection between two pipes or cables, and the counterpart to the nipple. Fastening members with an internal thread, which is more than twice as long as the inner diameter will be referred to as threaded sleeves.

Rohrtechnik

For pipes, for example Stemmmuffen, grid couplings, plug-in sleeves, adhesive joints, pressing joints and threaded sockets depending on the requirement of the tube material and the duty transporting goods ( for example, liquids, gases, granulated solid, cables, wires ) are used. A sleeve can also - are produced by the expansion of a pipe end ( tube expander ) - depending on the material.

Sleeves can enhance the joint when connecting thin-walled tubes or connect in the first place. Advantages are very low material stresses caused by gluing, screwing, crimping or soldering.

Due to the lower temperatures of up to 900 ° C during soldering arise (as opposed to welding) reduced material stresses and no material weakening due to uncontrolled burn. Furthermore, the bonding of different materials is possible. Disadvantages are a potentially improper preparation of the joint and requirements for the artisanal qualities of the performers as well - in metals - the risk of electrochemical corrosion between the material and the Lot. Typical example are lugged bicycle frame here.

Depending on the application, a distinction between connection, through joints and branch joints, which are sometimes also different in their design. When changing the nominal diameter is called a reducer.

Valve technology

For valves, the term will be half sleeves and sleeves valve used.

• The sleeve valve is a separate valve that has all the necessary connections integrated via a terminal block. The working ports are on the valve itself
• The half sleeve valve is designed for installation in an omnibus block / valve support, which includes the supply terminals. The working ports are on the valve itself

Electrical Engineering

Strictly speaking sockets in electrical connection but no insulation and protection elements - are firmly connected to the cable and only the actual electrical junction enclose - as opposed to a protective tube. For cables is made ​​is between cast resin, Gelmuffen, shrink sleeves ( heat shrink and cold shrink sleeves), distinguished sleeves in slide-on, being employed in energy technology might in different voltage levels as low or medium voltage, various socket types.

With sleeves in communication technology is crucial that each corresponding wires ( copper technology ) and fibers ( fiber optics ) are joined smoothly with one another. In fiber optics, this is done with the help of splice trays that are placed in the socket. And branching points in communication cables are generally sealed with shrink sleeves or Thermoplastic - clamping sleeves ( TK - sleeves). For cables with lead sheath of the old type lead sleeves were used. Today we used for shrink transition joints for connection to plastic cables.

The grounding sleeve ( telecommunications ), however not only serves as insulation and protective element, but also constitutes an electrical connection

With sleeves in energy technology (medium voltage from 10 kV) electrical control by field control body or control box hoses is made in Endverschlusstechnik. In this case, it depends on the inner and outer field smoothing.

Chemical Laboratory

With sleeves in the chemical laboratory of tripods devices for attaching a small device parts ( stand clamps, radiator brackets, iron rings, et cetera ) are attached.

Sayings

Both the " jitters " and "I'm the sleeve " describe a queasy feeling of fear that an activity can proceed disadvantageous.