Armored steel pipe

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Various armored steel pipes for routing cables, including dust-proof partitioning, but not passed through a fire protection partition! The photo does not show a fireproof bulkhead for fire protection

Armored steel pipe (colloquially Stapa pipe) is an electrical installation pipe made of steel and is primarily used to accommodate cables and wires. It has a very high mechanical strength and is therefore particularly suitable for extremely rough operation (e.g. mining , power plants, chemical plants). Armored steel pipes are supplied in lengths of three meters. There are black painted and galvanized pipes on the market. The connections for two pipes are available as push-in sockets or as threaded sockets, which are pushed or screwed over both ends. Since 2011, armored steel pipes have also been manufactured with a molded socket.

Recently, stainless steel pipes made of the materials 1.4301 or 1.4571 have been used to a greater extent, especially in the food sector, in the area of ​​sewage treatment plants and in road tunnels. There is also a trend towards replacing Stapa pipes with aluminum pipes.

Since 2000, the PG sizes have been replaced by metric sizes for the outer diameter. According to the current European standard, there are 16, 20, 25, 32, 40, 50 and 63 mm outer diameters. Ready-made bends are available for 90 ° bends. Armored steel pipes with a wall thickness of 2 mm or more can be bent cold using a bending device. Corresponding plastic end grommets provide mechanical protection for the cables and wires emerging from the pipe. The pipes are fastened using special clamps .

The following standards apply:

  • EN 60423 Electrical installation pipe systems for electrical energy and for information - outer diameter of electrical installation pipes and threads for electrical installation pipes and their accessories
  • EN 61386 (corresponds in Germany to VDE 0605) Electrical installation pipe systems for electrical energy and for information
    • Part 1: General requirements
    • Part 21: Special requirements for rigid electrical installation pipe systems
    • Part 25: Special requirements for pipe holders
  • EN ISO 1461 for hot dip galvanizing

literature

  • A. Verduhn / W. Nell: Handbook of electrical engineering . Fachbuchverlag GmbH Leipzig
  • Friedrich books of tables : VEB Fachbuchverlag Leipzig 1985

See also